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Publications (86)

astro-ph.CO2012

Search for Antihelium with the BESS-Polar Spectrometer

K. Abe, H. Fuke, S. Haino +33

In two long-duration balloon flights over Antarctica, the BESS-Polar collaboration has searched for antihelium in the cosmic radiation with higher sensitivity than any reported inv…

cond-mat.str-el2014

Magnetic phase diagram of Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$

J. Sugiyama, H. Nozaki, I. Umegaki +8

In order to study the phase diagram from a microscopic viewpoint, we have measured wTF- and ZF- $I^¼^{+}$ SR spectra for the Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$ powder samples with $x = 0$ , 0.2,…

cond-mat.str-el2005

High field x-ray diffraction study on a magnetic-field-induced valence transition in YbInCu4

Y. H. Matsuda, T. Inami, K. Ohwada +6

We report the first high-field x-ray diffraction experiment using synchrotron x-rays and pulsed magnetic fields exceeding 30 T. Lattice deformation due to a magnetic-field-induced…

astro-ph1998

Measurement of Low-Energy Cosmic-Ray Antiprotons at Solar Minimum

H. Matsunaga, S. Orito, H. Matsumoto +21

The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS '95 data. The…

physics.acc-ph2022

Nurturing the Industrial Accelerator Technology Base in the US

A. M. M. Todd, R. Agustsson, D. L. Bruhwiler +8

The purpose of this white paper is to discuss the importance of having a world class domestic industrial vendor base, capable of supporting the needs of the particle accelerator fa…

cond-mat.supr-con2006

In-plane Anisotropy of the Magnetic Fluctuations in NaxCoO2-yH2O

C. Michioka, Y. Itoh, H. Ohta +2

We report the $^{59}$ Co NMR studies of the in-plane anisotropy of bilayer hydrated Na $_{x} Co O_{2} \cdot$ $y H_{2} O$ using a oriented powder sample by a magnetic fie…

cond-mat.str-el2007

Magnetic and Structural Studies of the Quasi-Two-Dimensional Spin-Gap System (CuCl)LaNb2O7

M. Yoshida, N. Ogata, M. Takigawa +6

We report magnetization, nuclear magnetic resonance (NMR), nuclear quadrupole resonance (NQR), and transmission electron microscopy (TEM) studies on the quasi-two-dimensional spin-…

cond-mat.supr-con2004

Weak Magnetic Order in the Bilayered-hydrate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O Structure Probed by Co Nuclear Quadrupole Resonance - Proposed Phase Diagram in Superconducting Na $_{x}$ CoO $_{2} \cdot$ $y$ H $_{2}$ O

Y. Ihara, K. Ishida, C. Michioka +6

A weak magnetic order was found in a non-superconducting bilayered-hydrate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O sample by a Co Nuclear Quadrupole Resonance (NQR) measurement. The nucle…

cond-mat.supr-con2005

$^{23}$ Na NMR Study of Layered Superconductor $N a_{x} C o O_{2} - y H_{2} O$

H. Ohta, C. Michioka, Y. Itoh +5

We measured $^{23}$ Na-NMR spectra and nuclear spin-lattice relaxation rates $^{23} (1/ T_{1})$ of superconducting and non-superconducting bilayer hydrate $N a_{x} C o O_{2} - y H_{2} O$ (x ~ 0.3, y…

hep-ex2000

Large-Area Scintillator Hodoscope with 50 ps Timing Resolution Onboard BESS

Y. Shikaze, S. Orito, T. Mitsui +7

We describe the design and performance of a large-area scintillator hodoscope onboard the BESS rigidity spectrometer; an instrument with an acceptance of 0.3 m^{2}sr. The hodoscope…

hep-ph2016

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

T. Aramaki, S. Boggs, S. Bufalino +24

Recent years have seen increased theoretical and experimental effort towards the first-ever detection of cosmic-ray antideuterons, in particular as an indirect signature of dark ma…

cond-mat.str-el2002

High-field magnetization of the 3d heavy-fermion system LiV $_{2}$ O $_{4 - d}$ (d = 0, 0.08)

N. Tsujii, K. Yoshimura, K. Kosuge +2

Metamagnetic behavior has been observed in LiV2O4 powder sample around 38 T at 4.2 K. On the other hand, magnetization for oxygen deficient LiV2O3.92 shows no indication of metamag…

astro-ph2008

Measurement of cosmic-ray low-energy antiproton spectrum with the first BESS-Polar Antarctic flight

K. Abe, H. Fuke, S. Haino +27

The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were record…

cond-mat.str-el2006

Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR

K. Kitagawa, K. Ishida, R. S. Perry +3

We report a site-separated $^{17}$ O-NMR study of the layered perovskite ruthenate Sr $_{3}$ Ru $_{2}$ O $_{7}$ , which exhibits nearly two-dimensional transport properties and itinerant metama…

cond-mat.supr-con2018

Evidence of a structural quantum critical point in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ from a lattice dynamics study

Y. W. Cheung, Y. J. Hu, M. Imai +11

Approaching a quantum critical point (QCP) has been an effective route to stabilize superconductivity. While the role of magnetic QCPs has been extensively discussed, similar explo…

cond-mat.str-el2004

Magnetic Fluctuations in the Metallic State of Na $_{0.7}$ CoO $_{2}$ Revealed by $^{23}$ Na NMR

Y. Ihara, K. Ishida, C. Michioka +4

Nuclear-magnetic-resonance (NMR) studies were performed in Na $_{0.7}$ CoO $_{2}$ to investigate its magnetic properties from the microscopic point of view. Na $_{0.7}$ CoO $_{2}$ is a start…

cond-mat.str-el2022

Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe $_{2}$ investigated by $I^¼^{+}$ SR as well as neutron and X-ray diffraction

E. Nocerino, C. Witteveen, S. Kobayashi +12

Two $-$ dimensional (2D) triangular lattices antiferromagnets (2D $-$ TLA) often manifest intriguing physical and technological properties, due to the strong interplay between lattice…

astro-ph2000

Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer

T. Sanuki, M. Motoki, H. Matsumoto +31

We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the BESS spectrometer in 1998…

astro-ph2003

Measurements of Proton, Helium and Muon Spectra at Small Atmospheric Depths with the BESS Spectrometer

K. Abe, T. Sanuki, K. Anraku +32

The cosmic-ray proton, helium, and muon spectra at small atmospheric depths of 4.5 -- 28 g/cm^2 were precisely measured during the slow descending period of the BESS-2001 balloon f…

hep-ex1995

The Cherenkov Correlated Timing Detector: Beam Test Results from Quartz and Acrylic Bars

H. Kichimi, Y. Sugaya, H. Yamaguchi +23

Several prototypes of a Cherenkov Correlated Timing (CCT) Detector have been tested at the KEK-PS test beam line. We describe the results for Cherenkov light yields and timing char…

astro-ph2003

Measurements of atmospheric muon spectra at mountain altitude

T. Sanuki, M. Fujikawa, K. Abe +26

We report new measurements of the atmospheric muons at mountain altitude. The measurement was carried out with the BESS detector at the top of Mt. Norikura, Japan. The altitude is…

cond-mat.mtrl-sci2014

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO $_{4}$

N. BÃ¼ttgen, K. Nawa, T. Fujita +7

We have performed NMR experiments on the quasi one-dimensional frustrated spin-1/2 system LiCuVO $_{4}$ in magnetic fields $H$ applied along the c-axis up to field values near the sat…

astro-ph.HE2011

Measurement of the cosmic-ray antiproton spectrum at solar minimum with a long-duration balloon flight over Antarctica

K. Abe, H. Fuke, S. Haino +26

The energy spectrum of cosmic-ray antiprotons from 0.17 to 3.5 GeV has been measured using 7886 antiprotons detected by BESS-Polar II during a long-duration flight over Antarctica…

cond-mat.str-el2009

$I^¼$ SR studies of the frustrated quasi-2d square-lattice spin system Cu(Cl,Br)La(Nb,Ta) $_{2}$ O $_{7}$ : evolution from spin-gap to antiferromagnetic state

Y. J. Uemura, A. A. Aczel, Y. Ajiro +15

We report muon spin relaxation ( $I^¼$ SR) and magnetic susceptibility measurements on Cu(Cl,Br)La(Nb,Ta) $_{2}$ O $_{7}$ , which demonstrate: (a) the absence of static magnetism in (CuCl…

cond-mat.supr-con2022

Peak in the critical current density in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ tuned towards the structural quantum critical point

Xinyou Liu, Wei Zhang, Kwing To Lai +4

(Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ is a rare system that has been shown to display an interesting interplay between structural quantum criticality and superconductivity. A put…

cond-mat.supr-con2003

Unconventional Superconductivity and Nearly Ferromagnetic Spin Fluctuations in Na $_{x}$ CoO $_{2}$ $\cdot y$ H $_{2}$ O

K. Ishida, Y. Ihara, Y. Maeno +7

Co NQR studies were performed in recently discovered superconductor Na $_{x}$ CoO $_{2}$ $\cdot y$ H $_{2}$ O to investigate physical properties in the superconducting (SC) and normal states. T…

hep-ph2015

Status of cosmic-ray antideuteron searches

P. von Doetinchem, T. Aramaki, S. Boggs +24

The precise measurement of cosmic-ray antiparticles serves as important means for identifying the nature of dark matter. Recent years showed that identifying the nature of dark mat…

cond-mat.supr-con2005

23Na NMR Studies of Non-superconducting and Superconducting Na0.35CoO2-1.3H2O (Tc < 1.8 and ~ 4.5 K)

H. Ohta, Y. Itoh, C. Michioka +1

We report 23Na NMR studies of the polycrystalline samples of bilayer hydrated cobalt oxides Na0.35CoO2-1.3H2O with the superconducting transition temperatures Tc < 1.8 and ~ 4.5 K.…

cond-mat.str-el2010

Magnetic Phase Diagram of Alternating Chain Compound Pb2V3O9

K. Nawa, C. Michioka, K. Yoshimura +2

Pb2V3O9 was found to have antiferromagnetic alternating chains of S=1/2 and show the antiferromagnetic long range ordered (AFLRO) state under the magnetic field between 4 and 38 T.…

cond-mat.supr-con2005

Possible Spin-triplet Superconductivity in NaxCoO2yH2O - 59Co NMR Study

M. Kato, C. Michioka, T. Waki +7

We report 59Co NMR studies on the magnetically oriented powder samples of Co-oxide superconductors NaxCoO2yH2O with Tc ~ 4.7 K. From two-dimensional powder pattern in the NMR spect…

astro-ph2007

Measurements of 0.2 to 20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer

Y. Shikaze, S. Haino, K. Abe +21

We measured low energy cosmic-ray proton and helium spectra in the kinetic energy range 0.215 - 21.5 GeV/n at different solar activities during a period from 1997 to 2002. The obse…

cond-mat.str-el2001

Superconductivity in a pyrochlore oxide Cd2Re2O7

H. Sakai, K. Yoshimura, H. Ohno +6

We make the first report that a metallic pyrochlore oxide \Cd2Re2O7, exhibits type II superconductivity at 1.1 K. The pyrochlore oxide is known to be a geometrical frustrated syste…

cond-mat.str-el2005

Universality in heavy-fermion systems with general degeneracy

N. Tsujii, H. Kontani, K. Yoshimura

We discuss the relation between the T^{2}-coefficient of electrical resistivity $A$ and the T-linear specific-heat coefficient $I^^{3}$ for heavy-fermion systems with general $N$ , wher…

cond-mat.str-el2006

Hole Doping Effects on Spin-gapped Na2Cu2TeO6 via Topochemical Na Deficiency

K. Morimoto, Y. Itoh, K. Yoshimura +2

We report the magnetic susceptibility and NMR studies of a spin-gapped layered compound Na2Cu2TeO6 (the spin gap $I^ \sim$ 250 K), the hole doping effect on the Cu2TeO6 plane via a…

physics.ins-det2010

The design, construction and performance of the MICE scintillating fibre trackers

M. Ellis, P. R. Hobson, P. Kyberd +49

Charged-particle tracking in the international Muon Ionisation Cooling Experiment (MICE) will be performed using two solenoidal spectrometers, each instrumented with a tracking det…

hep-ex1998

Development of a Large-Area Aerogel Cherenkov Counter Onboard BESS

Y. Asaoka, K. Abe, K. Yoshimura +3

This paper describes the development of a threshold type aerogel Cherenkov counter with a large sensitive area of 0.6 m $^{2}$ to be carried onboard the BESS rigidity spectrometer to…

cond-mat.str-el2006

Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr $_{1 - x}$ Ca $_{x}$ )RuO $_{3}$

Y. J. Uemura, T. Goko, I. M. Gat-Malureanu +18

Quantum phase transitions (QPTs) have been studied extensively in correlated electron systems. Characterization of magnetism at QPTs has, however, been limited by the volume-integr…

cond-mat.str-el2008

Novel critical exponent of magnetization curves near the ferromagnetic quantum phase transitions of Sr1-xAxRuO3 (A = Ca, La0.5Na0.5, and La)

Y. Itoh, T. Mizoguchi, K. Yoshimura

We report a novel critical exponent delta=3/2 of magnetization curves M=H^{1/delta} near the ferromagnetic quantum phase transitions of Sr1-xAxRuO3 (A = Ca, La0.5Na0.5, and La), wh…

astro-ph1997

A New Limit on the Flux of Cosmic Antihelium

T. Saeki, K. Anraku, S. Orito +21

A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any a…

cond-mat.supr-con2006

Unconventional Superconductivity Induced by Quantum Critical Fluctuations in Hydrate Cobaltate Na $_{x}$ (H $_{3}$ O) $_{z}$ CoO $_{x} \cdot$ $y$ H $_{2}$ O -- Relationship between Magnetic Fluctuations and the Superconductivity Revealed by a Co Nuclear Quadrupole Resonance --

Y. Ihara, H. Takeya, K. Ishida +7

Co nuclear-quadrupole-resonance (NQR) measurements were performed on various bilayered hydrate cobaltate Na_x(H_3O)_zCoO_2\cdot yH_2O with different values of the superconducting a…

cond-mat.str-el2015

Soft X-ray Angle Resolved Photoemission with Micro Positioning Techniques for Metallic V $_{2}$ O $_{3}$

H. Fujiwara, T. Kiss, Y. K. Wakabayashi +17

We have performed soft-X-ray angle resolved photoemission for metallic V $_{2}$ O $_{3}$ . Combining a micro focus beam (40 x 65 $I^¼$ m $^{2}$ ) and micro positioning techniques with a long wor…

cond-mat.supr-con2009

Magnetic anomalies of hydrous cobaltate compound Na_x(H_3O)_zCoO_2 \cdot yH_2O detected by NMR and NQR measurements

Y. Ihara, H. Takeya, K. Ishida +5

In order to investigate the relationship between superconductivity and magnetism in bilayer-hydrate cobaltate Na_x(H_3O)_zCoO_2 \cdot yH_2O, Co nuclear magnetic resonance (NMR) and…

astro-ph2002

Precise Measurements of Atmospheric Muon Fluxes with the BESS Spectrometer

M. Motoki, T. Sanuki, S. Orito +36

The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observat…

cond-mat.supr-con2015

Ambient Pressure Structural Quantum Critical Point in the Phase Diagram of (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$

S. K. Goh, D. A. Tompsett, P. J. Saines +5

The quasi-skutterudite superconductor Sr $_{3}$ Rh $_{4}$ Sn $_{13}$ features a pronounced anomaly in electrical resistivity at $T^{*} \sim$ 138 K. We show that the anomaly is caused by a secon…

cond-mat.supr-con2007

Site-selective $^{63}$ Cu NMR study of the vortex cores of Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$

Y. Itoh, C. Michioka, K. Yoshimura +2

We report site-selective $^{63}$ Cu NMR studies of the vortex core states of an overdoped Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ with $T_{c}$ = 85 K. We observed a relatively high density of…

physics.acc-ph2001

Progress in Absorber R&D 2: Windows

D. M. Kaplan, E. L. Black, K. W. Cassel +16

A program is underway to develop liquid-hydrogen energy absorbers for ionization cooling of muon-beam transverse emittance. Minimization of multiple-scattering-induced beam heating…

astro-ph.HE2016

Measurements of cosmic-ray proton and helium spectra from the BESS-Polar long-duration balloon flights over Antarctica

K. Abe, H. Fuke, S. Haino +34

The BESS-Polar Collaboration measured the energy spectra of cosmic-ray protons and helium during two long-duration balloon flights over Antarctica in December 2004 and December 200…

astro-ph2003

Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude

T. Sanuki, M. Fujikawa, H. Matsunaga +22

Cosmic-ray proton and antiproton spectra were measured at mountain altitude, 2770 m above sea level. We observed more than 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy…

physics.med-ph2015

Measurement and comparison of individual external doses of high-school students living in Japan, France, Poland and Belarus -- the "D-shuttle" project --

N. Adachi, V. Adamovitch, Y. Adjovi +228

Twelve high schools in Japan (of which six are in Fukushima Prefecture), four in France, eight in Poland and two in Belarus cooperated in the measurement and comparison of individu…

astro-ph1999

Precision Measurement of Cosmic-Ray Antiproton Spectrum

S. Orito, T. Maeno, H. Matsunaga +31

The energy spectrum of cosmic-ray antiprotons has been measured in the range 0.18 to 3.56 GeV, based on 458 antiprotons collected by BESS in recent solar-minimum period. We have de…

cond-mat.supr-con2008

Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR

Y. Itoh, N. Moritsu, K. Yoshimura

We report 7Li NMR studies of V-substitution effects on spinel oxide superconductor LiTi2O4 (Tc = 13.4 K). In LiTi2-xVxO4 (x = 0-0.4), the V substitution for the Ti site suppressed…

physics.ins-det2006

Development of Multi-Pixel Photon Counters

M. Yokoyama, T. Nobuhara, M. Taguchi +12

The multi-pixel photon counter (MPPC) is a newly developed photodetector with an excellent photon counting capability. It also has many attractive features such as small size, high…

cond-mat.supr-con2004

Determination of The Spin Contributed Knight Shift in $N a_{0.35} C o O_{2} \cdot 1.3 H_{2} O$

C. Michioka, M. Kato, K. Yoshimura +4

The spin contributed Knight shift $^{59} K_{s}$ of $^{59} Co$ in the triangular lattice superconductor, $N a_{0.35} Co O_{2} \cdot 1.3 H_{2} O$ , has been estimated by NM…

hep-ex2003

A New Method For A Sensitive Deuteron EDM Experiment

Y. K. Semertzidis, M. Aoki, M. Auzinsh +35

In this paper a new method is presented for particles in storage rings which could reach a statistical sensitivity of 10**(-27) e cm for the deuteron EDM. This implies an improveme…

hep-ex2013

Thorium isomer for radiative emission of neutrino pair

N. Sasao, S. Uetake, A. Yoshimi +2

It is proposed to use the isomer ionic ground state $^{229 m}$ Th $^{4 +}$ embedded in transparent crystals for precision determination of unknown neutrino parameters. Isolation from s…

cond-mat.supr-con2006

59Co Nuclear Quadrupole Resonance Studies of Superconducting and Non-superconducting Bilayer Water Intercalated Sodium Cobalt Oxides NaxCoO2.yH2O

C. Michioka, H. Ohta, Y. Itoh +1

We report 59Co nuclear quadrupole resonance (NQR) studies of bilayer water intercalated sodium cobalt oxides NaxCoO2.yH2O (BLH) with the superconducting transition temperatures, 2…

cond-mat.str-el2022

The Duel of Magnetic Interactions & Structural Instabilities: Itinerant Frustration in the Triangular Lattice Compound LiCrSe $_{2}$

E. Nocerino, S. Kobayashi, C. Witteveen +14

The recent synthesis of the chromium selenide compound LiCrSe $_{2}$ constitutes a valuable addition to the ensemble of two-dimensional triangular lattice antiferromagnets (2D-TLA). I…

astro-ph2004

Measurements of Primary and Atmospheric Cosmic-Ray Spectra with the BESS-TeV Spectrometer

S. Haino, T. Sanuki, K. Abe +30

Primary and atmospheric cosmic-ray spectra were precisely measured with the BESS-TeV spectrometer. The spectrometer was upgraded from BESS-98 to achieve seven times higher resoluti…

astro-ph2005

Measurements of Atmospheric Antiprotons

K. Yamato, K. Abe, H. Fuke +21

We measured atmospheric antiproton spectra in the energy range 0.2 to 3.4 GeV, at sea level and at balloon altitude in the atmospheric depth range 4.5 to 26 g/cm^2. The observed en…

physics.ins-det2018

Energy response of X-rays under high flux conditions using a thin APD for the energy range of 6-33 keV

T. Masuda, T. Hiraki, H. Kaino +10

This paper reports on the demonstration of a high-rate energy measurement technique using a thin depletion layer silicon avalanche photodiode (Si-APD). A dedicated amplitude-to-tim…

cond-mat.supr-con2005

Vortex State of Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ via $^{205}$ Tl NMR at 2 Tesla

Y. Itoh, C. Michioka, K. Yoshimura +2

We report a $^{205}$ Tl NMR study of vortex state for an aligned polycrystalline sample of an overdoped high- $T_{c}$ superconductor Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ ( $T_{c} \sim$ 85 K) with mag…

nucl-ex2022

Measurement of differential cross sections for $I^£^{+} p$ elastic scattering in the momentum range 0.44-0.80 GeV/c

PARC E40 Collaboration, T. Nanamura, K. Miwa +69

We performed a novel $I^£^{+} p$ scattering experiment at the J-PARC Hadron Experimental Facility. Approximately 2400 $I^£^{+} p$ elastic scattering events were identified from $4.9 \tim…

physics.ins-det2022

SiPM module for the ACME III electron EDM search

A. Hiramoto, T. Masuda, D. G. Ang +9

This report shows the design and the performance of a large area Silicon Photomultiplier (SiPM) module developed detection of fluorescent light emitted from a 10 cm scale volume. T…

hep-ex1995

The Cherenkov Correlated Timing Detector: Materials, Geometry and Timing Constraints

D. Aronstein, T. Bergfeld, D. Horton +19

The key parameters of Cherenkov Correlated Timing (CCT) detectors are discussed. Measurements of radiator geometry, optical properties of radiator and coupling materials, and photo…

nucl-ex2025

Measurement of $I^$ Polarization in the $I ¨ ^{-} p \to K^{0} I^$ Reaction at $p_{I ¨ ^{-}} = 1.33$ GeV/ $c$ toward a New $I^ p$ Scattering Experiment

PARC E40 Collaboration, T. Sakao, K. Miwa +69

This paper presents high-precision experimental data of the polarization of the $I^$ hyperon in the $I ¨ ^{-} p \to K^{0} I^$ reaction, measured in the angular range $0.6<\cos Î¸^{CM}…

physics.ins-det2002

Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV

Y. Asaoka, K. Yoshimura, T. Yoshida +22

An accelerator experiment was performed using a low-energy antiproton beam to measure antiproton detection efficiency of BESS, a balloon-borne spectrometer with a superconducting s…

nucl-ex2017

Nuclear resonant scattering experiment with fast time response: new scheme for observation of $^{229 m}$ Th radiative decay

A. Yoshimi, H. Hara, T. Hiraki +24

Nuclear resonant excitation of the 29.19-keV level in $^{229}$ Th with high-brilliance synchrotron- radiation and detection of its decay signal, are proposed with the aim of populat…

astro-ph2002

Measurements of Cosmic-ray Low-energy Antiproton and Proton Spectra in a Transient Period of the Solar Field Reversal

Y. Asaoka, Y. Shikaze, K. Abe +39

The energy spectra of cosmic-ray low-energy antiprotons and protons have been measured by BESS in 1999 and 2000, during a period covering the solar magnetic field reversal. Based o…

cond-mat.supr-con2006

23Na NMR study of non-superconducting double-layer hydrate NaxCoO2.yH2O

H. Ohta, Y. Itoh, C. Michioka +1

We report 23Na NMR studies of the polycrystalline samples of double-layer hydrated cobalt oxides NaxCoO2.yH2O (x ~ 0.35 and y ~ 1.3) with the superconducting transition temperature…

physics.acc-ph2001

Progress in Absorber R&D for Muon Cooling

D. M. Kaplan, E. L. Black, M. Boghosian +19

A stored-muon-beam neutrino factory may require transverse ionization cooling of the muon beam. We describe recent progress in research and development on energy absorbers for muon…

physics.acc-ph2013

MICE: the Muon Ionization Cooling Experiment. Step I: First Measurement of Emittance with Particle Physics Detectors

U. Bravar, M. Bogomilov, Y. Karadzhov +144

The Muon Ionization Cooling Experiment (MICE) is a strategic R&D project intended to demonstrate the only practical solution to providing high brilliance beams necessary for a neut…

astro-ph2003

Measurement of Cosmic-Ray Proton, Antiproton and Muon Spectra at Mountain Altitude

T. Sanuki, M. Fujikawa, K. Abe +22

Measurement of cosmic-ray proton, antiproton and muon spectra was carried out at mountain altitude. We observed 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy region of…

physics.ins-det2017

Fast X-ray detector system with simultaneous measurement of timing and energy for a single photon

T. Masuda, S. Okubo, H. Hara +12

We developed a fast X-ray detector system for nuclear resonant scattering (NRS) experiments. Our system employs silicon avalanche photo-diode (Si-APD) as a fast X-ray sensor. The s…

nucl-ex2022

Precise measurement of differential cross sections of the Î£-p --> Î n reaction in momentum range 470-650 MeV/c

PARC E40 Collaboration, K. Miwa, J. K. Ahn +69

The differential cross sections of the Î£-p --> Î n reaction were measured accurately for the Î£- momentum (p_{Î£}) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental…

nucl-ex2021

Estimation of radiative half-life of $^{229 m}$ Th by half-life measurement of other nuclear excited states in $^{229}$ Th

Y. Shigekawa, A. Yamaguchi, K. Suzuki +8

We perform coincidence measurements between $I^\pm$ particles and $I^^{3}$ rays from a $^{233}$ U source to determine the half-lives of the excited state in a $^{229}$ Th nucleus. We first…

cond-mat.supr-con2005

Zeeman Perturbed $^{63}$ Cu Nuclear Quadrupole Resonance Study of the Vortex State of YBa $_{2}$ Cu $_{3}$ O $_{7 - I^´}$

Y. Itoh, C. Michioka, K. Yoshimura +1

We report a $^{63}$ Cu nuclear quadrupole resonance (NQR) study of the vortex state for an aligned polycrystalline sample of a slightly overdoped high- $T_{c}$ superconductor YBa $_{2}$ Cu…

astro-ph2005

Search for Cosmic-Ray Antideuterons

H. Fuke, T. Maeno, K. Abe +23

We performed a search for cosmic-ray antideuterons using data collected during four BESS balloon flights from 1997 to 2000. No candidate was found. We derived, for the first time,…

cond-mat.str-el2003

Spin Susceptibility and Superexchange Interaction in the Antiferromagnet CuO

T. Shimizu, T. Matsumoto, A. Goto +3

Evidence for the quasi one-dimensional (1D) antiferromagnetism of CuO is presented in a framework of Heisenberg model. We have obtained an experimental absolute value of the parama…

cond-mat.supr-con2008

59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2-yH2O

Y. Itoh, H. Ohta, C. Michioka +2

We present our NMR studies of double-layer hydrated cobalt oxides NaxCoO2-yH2O (x ~ 0.35, y ~ 1.3) with various Tc = 0 - 4.8 K and magnetic transition temperatures. High-resolution…

cond-mat.str-el2008

Critical Slowing Down of Triangular Lattice Spin-3/2 Heisenberg Antiferromagnet Li7RuO6 via 7Li NMR

Y. Itoh, C. Michioka, K. Yoshimura +2

We report 7Li NMR studies of single crystals of triangular-lattice Heisenberg antiferromagnet Li7RuO6. Slow critical divergence with a wide critical region of |T/TN - 1|< 7 was obs…

cond-mat.supr-con2005

Anisotropic Behavior of Knight Shift in Superconducting State of Na_xCoO_2yH_2O

Y. Ihara, K. Ishida, H. Takeya +8

The Co Knight shift was measured in an aligned powder sample of Na_xCoO_2yH_2O, which shows superconductivity at T_c \sim 4.6 K. The Knight-shift components parallel (K_c) and perp…

cond-mat.str-el2002

High-resolution Photoemission Study of Cd2Re2O7

A. Irizawa, A. Higashiya, S. Kasai +9

High-resolution bulk-sensitive photoemission has been measured for pyrochlore oxide Cd2Re2O7. Temperature variations of the spectral shapes between 20 and 250 K are obviously obser…

nucl-ex2021

Measurement of the differential cross sections of the Sigma-p elastic scattering in momentum range of 470 to 850 MeV/c

PARC E40 Collaboration, K. Miwa, J. K. Ahn +69

A high statistics $I^£ p$ scattering experiment has been performed at the J-PARC Hadron Experimental Facility. Data for momentum-tagged $I^£^{-}$ running in a liquid hydrogen target w…

cond-mat.str-el2008

Antiferromagnetic Nuclear Resonance in the Quasi-Two-Dimensional (CuBr)LaNb2O7

M. Yoshida, N. Ogata, M. Takigawa +4

We report nuclear magnetic resonance (NMR) studies in the antiferromagnetic state of the quasi-two-dimensional (CuBr)LaNb2O7. The NMR spectra at zero magnetic field and 4.2 K indic…

cond-mat.supr-con2004

Correlation between Superconducting Transition Temperature $T_{c}$ and Increase of Nuclear Spin-Lattice Relaxation Rate Devided by Temperature $1/ T_{1} T$ at $T_{c}$ in the Hydrate Cobaltate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O

Y. Ihara, K. Ishida, C. Michioka +6

We have performed Co-nuclear quadrupole resonance (NQR) studies on Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O compounds with different Na ( $x$ ) and hydrate ( $y$ ) contents. Two samples with d…

cond-mat.str-el2003

Deviation from the Kadowaki-Woods relation in Yb-based intermediate-valent systems

N. Tsujii, K. Yoshimura, K. Kosuge

The T^2 coefficient of electrical resistivity, A, is compared with the electronic specific-heat coefficient, Î³, for a number of Yb-based compounds. It is revealed that many system…

Publications (86)

Search for Antihelium with the BESS-Polar Spectrometer

Magnetic phase diagram of Sr1−x​Cax​Co2​P2​

High field x-ray diffraction study on a magnetic-field-induced valence transition in YbInCu4

Measurement of Low-Energy Cosmic-Ray Antiprotons at Solar Minimum

Nurturing the Industrial Accelerator Technology Base in the US

In-plane Anisotropy of the Magnetic Fluctuations in NaxCoO2-yH2O

Magnetic and Structural Studies of the Quasi-Two-Dimensional Spin-Gap System (CuCl)LaNb2O7

Weak Magnetic Order in the Bilayered-hydrate Nax​CoO2​⋅yH2​O Structure Probed by Co Nuclear Quadrupole Resonance - Proposed Phase Diagram in Superconducting Nax​CoO2​⋅ yH2​O

23Na NMR Study of Layered Superconductor Nax​CoO2​−yH2​O

Large-Area Scintillator Hodoscope with 50 ps Timing Resolution Onboard BESS

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

High-field magnetization of the 3d heavy-fermion system LiV2​O4−d​ (d = 0, 0.08)

Measurement of cosmic-ray low-energy antiproton spectrum with the first BESS-Polar Antarctic flight

Orbital Properties of Sr3Ru2O7 and Related Ruthenates Probed by 17O-NMR

Evidence of a structural quantum critical point in (Cax​Sr1−x​)3​Rh4​Sn13​ from a lattice dynamics study

Magnetic Fluctuations in the Metallic State of Na0.7​CoO2​ Revealed by 23Na NMR

Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe2​ investigated by I^¼+SR as well as neutron and X-ray diffraction

Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer

Measurements of Proton, Helium and Muon Spectra at Small Atmospheric Depths with the BESS Spectrometer

The Cherenkov Correlated Timing Detector: Beam Test Results from Quartz and Acrylic Bars

Measurements of atmospheric muon spectra at mountain altitude

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO4​

Measurement of the cosmic-ray antiproton spectrum at solar minimum with a long-duration balloon flight over Antarctica

I^¼SR studies of the frustrated quasi-2d square-lattice spin system Cu(Cl,Br)La(Nb,Ta)2​O7​: evolution from spin-gap to antiferromagnetic state

Peak in the critical current density in (Cax​Sr1−x​)3​Rh4​Sn13​ tuned towards the structural quantum critical point

Unconventional Superconductivity and Nearly Ferromagnetic Spin Fluctuations in Nax​CoO2​⋅yH2​O

Status of cosmic-ray antideuteron searches

23Na NMR Studies of Non-superconducting and Superconducting Na0.35CoO2-1.3H2O (Tc < 1.8 and ~ 4.5 K)

Magnetic Phase Diagram of Alternating Chain Compound Pb2V3O9

Possible Spin-triplet Superconductivity in NaxCoO2yH2O - 59Co NMR Study

Measurements of 0.2 to 20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer

Superconductivity in a pyrochlore oxide Cd2Re2O7

Universality in heavy-fermion systems with general degeneracy

Hole Doping Effects on Spin-gapped Na2Cu2TeO6 via Topochemical Na Deficiency

The design, construction and performance of the MICE scintillating fibre trackers

Development of a Large-Area Aerogel Cherenkov Counter Onboard BESS

Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr1−x​Cax​)RuO3​

Novel critical exponent of magnetization curves near the ferromagnetic quantum phase transitions of Sr1-xAxRuO3 (A = Ca, La0.5Na0.5, and La)

A New Limit on the Flux of Cosmic Antihelium

Unconventional Superconductivity Induced by Quantum Critical Fluctuations in Hydrate Cobaltate Nax​(H3​O)z​CoOx​⋅ yH2​O -- Relationship between Magnetic Fluctuations and the Superconductivity Revealed by a Co Nuclear Quadrupole Resonance --

Soft X-ray Angle Resolved Photoemission with Micro Positioning Techniques for Metallic V2​O3​

Magnetic anomalies of hydrous cobaltate compound Na_x(H_3O)_zCoO_2 \cdot yH_2O detected by NMR and NQR measurements

Precise Measurements of Atmospheric Muon Fluxes with the BESS Spectrometer

Ambient Pressure Structural Quantum Critical Point in the Phase Diagram of (Cax​Sr1−x​)3​Rh4​Sn13​

Site-selective 63Cu NMR study of the vortex cores of Tl2​Ba2​CuO6+I^´​

Progress in Absorber R&D 2: Windows

Measurements of cosmic-ray proton and helium spectra from the BESS-Polar long-duration balloon flights over Antarctica

Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude

Measurement and comparison of individual external doses of high-school students living in Japan, France, Poland and Belarus -- the "D-shuttle" project --

Precision Measurement of Cosmic-Ray Antiproton Spectrum

Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR

Development of Multi-Pixel Photon Counters

Determination of The Spin Contributed Knight Shift in Na0.35​CoO2​⋅1.3H2​O

A New Method For A Sensitive Deuteron EDM Experiment

Thorium isomer for radiative emission of neutrino pair

59Co Nuclear Quadrupole Resonance Studies of Superconducting and Non-superconducting Bilayer Water Intercalated Sodium Cobalt Oxides NaxCoO2.yH2O

The Duel of Magnetic Interactions & Structural Instabilities: Itinerant Frustration in the Triangular Lattice Compound LiCrSe2​

Measurements of Primary and Atmospheric Cosmic-Ray Spectra with the BESS-TeV Spectrometer

Measurements of Atmospheric Antiprotons

Energy response of X-rays under high flux conditions using a thin APD for the energy range of 6-33 keV

Vortex State of Tl2​Ba2​CuO6+I^´​ via 205Tl NMR at 2 Tesla

Measurement of differential cross sections for I^£+p elastic scattering in the momentum range 0.44-0.80 GeV/c

SiPM module for the ACME III electron EDM search

The Cherenkov Correlated Timing Detector: Materials, Geometry and Timing Constraints

Measurement of I^ Polarization in the I¨−p→K0I^ Reaction at pI¨−​=1.33 GeV/c toward a New I^p Scattering Experiment

Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV

Nuclear resonant scattering experiment with fast time response: new scheme for observation of 229mTh radiative decay

Measurements of Cosmic-ray Low-energy Antiproton and Proton Spectra in a Transient Period of the Solar Field Reversal

23Na NMR study of non-superconducting double-layer hydrate NaxCoO2.yH2O

Progress in Absorber R&D for Muon Cooling

MICE: the Muon Ionization Cooling Experiment. Step I: First Measurement of Emittance with Particle Physics Detectors

Measurement of Cosmic-Ray Proton, Antiproton and Muon Spectra at Mountain Altitude

Fast X-ray detector system with simultaneous measurement of timing and energy for a single photon

Precise measurement of differential cross sections of the Î£-p --> Î n reaction in momentum range 470-650 MeV/c

Estimation of radiative half-life of 229mTh by half-life measurement of other nuclear excited states in 229Th

Zeeman Perturbed 63Cu Nuclear Quadrupole Resonance Study of the Vortex State of YBa2​Cu3​O7−I^´​

Search for Cosmic-Ray Antideuterons

Spin Susceptibility and Superexchange Interaction in the Antiferromagnet CuO

59Co, 23Na, and 1H NMR Studies of Double-Layer Hydrated Superconductors NaxCoO2-yH2O

Magnetic phase diagram of Sr $_{1 - x}$ Ca $_{x}$ Co $_{2}$ P $_{2}$

Weak Magnetic Order in the Bilayered-hydrate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O Structure Probed by Co Nuclear Quadrupole Resonance - Proposed Phase Diagram in Superconducting Na $_{x}$ CoO $_{2} \cdot$ $y$ H $_{2}$ O

$^{23}$ Na NMR Study of Layered Superconductor $N a_{x} C o O_{2} - y H_{2} O$

High-field magnetization of the 3d heavy-fermion system LiV $_{2}$ O $_{4 - d}$ (d = 0, 0.08)

Evidence of a structural quantum critical point in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ from a lattice dynamics study

Magnetic Fluctuations in the Metallic State of Na $_{0.7}$ CoO $_{2}$ Revealed by $^{23}$ Na NMR

Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe $_{2}$ investigated by $I^¼^{+}$ SR as well as neutron and X-ray diffraction

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO $_{4}$

$I^¼$ SR studies of the frustrated quasi-2d square-lattice spin system Cu(Cl,Br)La(Nb,Ta) $_{2}$ O $_{7}$ : evolution from spin-gap to antiferromagnetic state

Peak in the critical current density in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ tuned towards the structural quantum critical point

Unconventional Superconductivity and Nearly Ferromagnetic Spin Fluctuations in Na $_{x}$ CoO $_{2}$ $\cdot y$ H $_{2}$ O

Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr $_{1 - x}$ Ca $_{x}$ )RuO $_{3}$

Unconventional Superconductivity Induced by Quantum Critical Fluctuations in Hydrate Cobaltate Na $_{x}$ (H $_{3}$ O) $_{z}$ CoO $_{x} \cdot$ $y$ H $_{2}$ O -- Relationship between Magnetic Fluctuations and the Superconductivity Revealed by a Co Nuclear Quadrupole Resonance --

Soft X-ray Angle Resolved Photoemission with Micro Positioning Techniques for Metallic V $_{2}$ O $_{3}$

Ambient Pressure Structural Quantum Critical Point in the Phase Diagram of (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$

Site-selective $^{63}$ Cu NMR study of the vortex cores of Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$

Determination of The Spin Contributed Knight Shift in $N a_{0.35} C o O_{2} \cdot 1.3 H_{2} O$

The Duel of Magnetic Interactions & Structural Instabilities: Itinerant Frustration in the Triangular Lattice Compound LiCrSe $_{2}$

Vortex State of Tl $_{2}$ Ba $_{2}$ CuO $_{6 + I^´}$ via $^{205}$ Tl NMR at 2 Tesla

Measurement of differential cross sections for $I^£^{+} p$ elastic scattering in the momentum range 0.44-0.80 GeV/c

Measurement of $I^$ Polarization in the $I ¨ ^{-} p \to K^{0} I^$ Reaction at $p_{I ¨ ^{-}} = 1.33$ GeV/ $c$ toward a New $I^ p$ Scattering Experiment

Nuclear resonant scattering experiment with fast time response: new scheme for observation of $^{229 m}$ Th radiative decay

Precise measurement of differential cross sections of the Î£-p --> Î n reaction in momentum range 470-650 MeV/c

Estimation of radiative half-life of $^{229 m}$ Th by half-life measurement of other nuclear excited states in $^{229}$ Th

Zeeman Perturbed $^{63}$ Cu Nuclear Quadrupole Resonance Study of the Vortex State of YBa $_{2}$ Cu $_{3}$ O $_{7 - I^´}$

Correlation between Superconducting Transition Temperature $T_{c}$ and Increase of Nuclear Spin-Lattice Relaxation Rate Devided by Temperature $1/ T_{1} T$ at $T_{c}$ in the Hydrate Cobaltate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O