43 citations · 221 across the 20 of their papers we have counts for
20 papers
Development of a Modular Current-Mode NaI(Tl) Detector Array for Parity Odd (n,γ) Cross Section Measurements
J. T. Mills, J. G. Otero Munoz, K. Dickerson +26
The Neutron Optics Parity and Time-Reversal Violation Experiment (NOPTREX) Collaboration has developed a modular array of 24 NaI(Tl) detectors to measure parity and time-reversal s…
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…
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…
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…
High sensitivity of a future search for P-odd/T-odd interactions on the 0.75 eV -wave resonance in forward transmission determined using pulsed neutron beam
R. Nakabe, C. J. Auton, S. Endo +27
Neutron transmission experiments can offer a new type of highly sensitive search for time-reversal invariance violating (TRIV) effects in nucleon-nucleon interactions via the same…
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…
Spin dependence in the -wave resonance of
T. Okudaira, R. Nakabe, S. Endo +24
We measured the spin dependence in a neutron-induced -wave resonance by using a polarized epithermal neutron beam and a polarized nuclear target. Our study focuses on the 0.75~e…
Measurements of neutron total and capture cross sections of La and evaluation of resonance parameters
Shunsuke Endo, Shiori Kawamura, Takuya Okudaira +6
Neutron total and capture cross sections of Lanthanum(La)-139 were measured at the Accurate Ne-utron-Nucleus Reaction measurement Instrument (ANNRI) of the Materials and Life Scien…
Angular distribution of -rays from a neutron-induced -wave resonance of Xe
T. Okudaira, Y. Tani, S. Endo +16
A neutron-energy dependent angular distribution was measured for individual -rays from the 3.2 eV -wave resonance of Xe+, that shows enhanced parity violation owin…
Measurement of the transverse asymmetry of -rays in the Sn(n,)Sn reaction
S. Endo, T. Okudaira, R. Abe +13
Largely enhanced parity-violating effects observed in compound resonances induced by epithermal neutrons are currently attributed to the mixing of parity-unfavored partial amplitud…
Angular distribution of rays from the p-wave resonance of Sn
J. Koga, S. Takada, S. Endo +14
The neutron energy-dependent angular distribution of rays from reaction was measured with germanium detectors and a pulsed neutron beam. The angular distr…
Energy dependent angular distribution of individual -rays in the La(, )La* reaction
T. Okudaira, S. Endo, H. Fujioka +14
Neutron energy-dependent angular distributions were observed for individual -rays from the 0.74 eV p-wave resonance of La+ to several lower excited states of …
Measurement of rays from LiF tile as an inner wall of a neutron-decay detector
J. Koga, S. Ieki, A. Kimura +12
A neutron lifetime measurement conducted at the Japan Proton Accelerator Research Complex (J-PARC) is counting the number of electrons from neutron decays with a time projection ch…
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…
Transverse asymmetry of rays from neutron-induced compound states of
T. Yamamoto, T. Okudaira, S. Endo +17
A correlation term in the reaction has been studied utilizing epithermal polarized neutrons and germanium det…
A Search for Possible Long Range Spin Dependent Interactions of the Neutron From Exotic Vector Boson Exchange
Christopher C. Haddock, Joseph Amadio, Eamon Anderson +26
We present a search for possible spin dependent interactions of the neutron with matter through exchange of spin 1 bosons with axial vector couplings as envisioned in possible exte…
Characterization of Germanium Detectors for the Measurement of the Angular Distribution of Prompt gamma-rays at the ANNRI in the MLF of the J-PARC
Shusuke Takada, Takuya Okudaira, Fumiya Goto +9
In this study, the germanium detector assembly, installed at the Accurate Neutron-Nuclear Reaction measurement Instruments (ANNRI) in the Material and Life Science Facility (MLF) o…
Angular Distribution of -rays from Neutron-Induced Compound States of La
T. Okudaira, S. Takada, K. Hirota +10
Angular distribution of individual -rays, emitted from a neutron-induced compound nuclear state via radiative capture reaction of La(n,) has been studied as a funct…
The Search for >35 MeV Neutrons from the June 3, 2012 Impulsive Flare
K. Koga, S. Masuda, H. Matsumoto +5
We analyzed a highly impulsive solar flare observed on June 3, 2012. In association with this flare, emissions of hard X-rays, high-energy gamma rays, and neutrons were detected by…