142 citations · 372 across the 24 of their papers we have counts for
24 papers
Development and Characterization of Low-Scattering Vanadium Nanoparticle Targets for Short-Range Interaction Searches
Masayuki Hiromoto, Tatsushi Shima, Christopher C. Haddock +8
We developed high-purity vanadium-based nanoparticle targets for neutron scattering experiments aimed at exploring gravity-like short-range new interactions in the submicron regime…
First Constraint on P-odd/T-odd Cross Section in Polarized Neutron Transmission through Transversely Polarized La
Rintaro Nakabe, Clayton J. Auton, Shunsuke Endo +27
We report the first constraint on time-reversal invariance violating (TRIV) effects in polarized neutron transmission through a transversely polarized La target. We formula…
Angular correlations in neutron-gamma reactions
Vladimir Gudkov, Hirohiko M. Shimizu
Angular correlations for low-energy neutron induced reactions are calculated using nuclear reaction formalism for multi level neutron capture with arbitrary multiplicities of $…
Proof-of-Principle Experiment on a Displacement-Noise-Free Neutron Interferometer for Gravitational Wave Detection
Shoki Iwaguchi, Takuhiro Fujiie, Taro Nambu +13
The displacement-noise-free interferometer (DFI) is designed to eliminate all displacement-induced noise while retaining sensitivity to gravitational wave (GW) signals. Ground-base…
Precision measurements of muonium and muonic helium hyperfine structure at J-PARC
Patrick Strasser, Mitsushi Abe, Kanta Asai +19
At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is now performing new precision measurements of the ground state hyperfine structure (HFS) of both muonium and…
Polarized cold-neutron reflectometry at JRR-3/MINE2 for the development of ultracold-neutron spin analyzers for a neutron EDM experiment at TRIUMF
Takashi Higuchi, Hiroaki Akatsuka, Alexis Brossard +18
The neutron electric dipole moment (EDM) is a sensitive probe for currently undiscovered sources of charge-parity symmetry violation. As part of the TRIUMF Ultracold Advanced Neutr…
Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons
S. Endo, R. Abe, H. Fujioka +21
Measurements of circular polarization of -ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited sta…
Demonstration of Near-Epithermal Neutron Reflective Optics
Takuhiro Fujiie, Ryota Abe, Masahiro Hino +11
Specular reflection of neutrons on material surfaces has been demonstrated in the energy range of 0.09-0.7 eV. The results suggest that the applicable energy range of reflective ne…
Combination of crystal growth with optical floating zone and evaluation of Nd3+:LaAlO3 crystals with the dynamic nuclear polarization of 139La and 27Al
Kohei Ishizaki, Ikuo Ide, Masaki Fujita +12
Producing a polarized lanthanum (La) target with high polarization and long relaxation time is crucial for realizing time-reversal violation experiments using polarized neutron bea…
Performance of the Fully-equipped Spin Flip Chopper For Neutron Lifetime Experiment at J-PARC
K. Mishima, G. Ichikawa, Y. Fuwa +19
To solve the ''neutron lifetime puzzle,'' where measured neutron lifetimes differ depending on the measurement methods, an experiment with pulsed neutron beam at J-PARC is in progr…
Sagnac-type neutron displacement-noise-free interferometeric gravitational-wave detector
Yuki Kawasaki, Shoki Iwaguchi, Tomohiro Ishikawa +13
The detection of low-frequency gravitational waves on Earth requires the reduction of displacement noise, which dominates the low-frequency band. One method to cancel test mass dis…
Improved Measurements of Muonic Helium Ground-State Hyperfine Structure at a Near-Zero Magnetic Field
P. Strasser, S. Fukumura, R. Iwai +9
Muonic helium atom hyperfine structure (HFS) measurements are a sensitive tool to test the three-body atomic system and bound-state quantum electrodynamics theory, and determine fu…
A Novel Nuclear Emulsion Detector for Measurement of Quantum States of Ultracold Neutrons in the Earth's Gravitational Field
Naoto Muto, Hartmut Abele, Tomoko Ariga +19
Hypothetical short-range interactions could be detected by measuring the wavefunctions of ultracold neutrons (UCNs) on a mirror bounded by the Earth's gravitational field. The Sear…
Precise Neutron Lifetime Measurement Using Pulsed Neutron Beams at J-PARC
N. Sumi, K. Hirota, G. Ichikawa +18
A neutron decays into a proton, an electron, and an anti-neutrino through the beta-decay process. The decay lifetime (880 s) is an important parameter in the weak interaction…
Development and application of a He Neutron Spin Filter at J-PARC
T. Okudaira, T. Oku, T. Ino +22
We are developing a neutron polarizer with polarized He gas, referred to as a He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scatte…
A Search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam
Christopher C. Haddock, Noriko Oi, Katsuya Hirota +8
We describe an experimental search for deviations from the inverse square law of gravity at the nanometer length scale using neutron scattering from noble gases on a pulsed slow ne…
A neutron detector with spatial resolution of submicron using fine-grained nuclear emulsion
N. Naganawa, S. Awano, M. Hino +9
We have been developing a neutron detector with spatial resolution of submicron by loading 6Li into fine-grained nuclear emulsion. By exposure to thermal neutrons, tracks from neut…
Pulsed UCN production using a Doppler shifter at J-PARC
S. Imajo, K. Mishima, M. Kitaguchi +8
We have constructed a Doppler-shifter-type pulsed ultra-cold neutron (UCN) source at the Materials and Life Science Experiment Facility (MLF) of the Japan Proton Accelerator Resear…
Development of time projection chamber for precise neutron lifetime measurement using pulsed cold neutron beams
Y. Arimoto, N. Higashi, Y. Igarashi +24
A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J…
Project X: Physics Opportunities
Andreas S. Kronfeld, Robert S. Tschirhart, Usama Al-Binni +133
Part 2 of "Project X: Accelerator Reference Design, Physics Opportunities, Broader Impacts". In this Part, we outline the particle-physics program that can be achieved with Project…
Summary of the J-PARC UCN Taskforce
The J-Parc Ucn Taskforce, :, Tomokazu Aso +21
Discussions in the taskforce meetings in the period of Jan.-Mar. 2009 on the technical possibility of the ultracold neutron (UCN) source at the Japan Proton Accelerator Research Co…
Parametric Resonance Enhancement in Neutron Interferometry and Search for Non-Newtonian Gravity
V. Gudkov, H. M. Shimizu, G. L. Greene
The parametric resonance enhancement of the phase of neutrons due to non-Newtonian anomalous gravitational is considered. The existence of such resonances are confirmed by numerica…
Apparatus for a Search for T-violating Muon Polarization in Stopped-Kaon Decays
E246 Collaboration, M. Abe
The detector built at KEK to search for T-violating transverse muon polarization in K+ --> pi0 mu+ nu (Kmu3) decay of stopped kaons is described. Sensitivity to the transverse pola…
A Precursor of Chiral Symmetry Restoration in the Nuclear Medium
T. Hatsuda, T. Kunihiro, H. Shimizu
Spectral enhancement near the 2m_π threshold in the I=J=0 channel in nuclei is shown to be a distinct signal of the partial restoration of chiral symmetry. The relevance of this ph…