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Sakai, Kenji; Oku, Takayuki; Okudaira, Takuya; Kai, Tetsuya; Harada, Masahide; Hiroi, Kosuke; Hayashida, Hirotoshi*; Kakurai, Kazuhisa*; Shimizu, Hirohiko*; Hirota, Katsuya*; et al.
JPS Conference Proceedings (Internet), 33, p.011116_1 - 011116_6, 2021/03
In neutron fundamental physics, study of correlation term 
of a neutron spin 
and a target nuclear spin 
is important because term interferes to parity non-conserving (PNC) and time reversal non-conserving terms. For this study, a xenon (Xe) is an interesting nucleus because it has been observed an enhancement of PNC effect around neutron resonance peaks, and polarizes up to 
by using a spin exchange optical pumping (SEOP) method. We would plan to develop a polarized Xe gas target with a compact in-situ SEOP system, and to study term by utilizing epithermal neutron beams supplied from a high intense pulsed spallation neutron source. As the first step, we attempted to measure neutron polarizing ability caused by term at a 9.6 eV s-wave resonance peak of 
Xe at BL10 in MLF, by detecting change 
of ratio between neutron transmissions with the polarized and unpolarized Xe target. After demonstrating that our apparatus could detect small change (
) of neutron transmissions caused by Doppler broadening effect, a signified value of has been obtained as preliminary results. For analyzing the obtained in detail, we are improving our nuclear magnetic resonance and electron paramagnetic resonance systems for evaluating Xe polarization independently of neutron beams.
Li, H.; Maekawa, Masaki; Kawasuso, Atsuo; Tanimura, Naoki*
Journal of Physics; Condensed Matter, 27(24), p.246001_1 - 246001_5, 2015/06
Times Cited Count：6 Percentile：27.97(Physics, Condensed Matter)
and its homologuesAnton, J.*; Hirata, Masaru; Fricke, B.*; Pershina, V.*
Chemical Physics Letters, 380(1-2), p.95 - 98, 2003/10
Times Cited Count：6 Percentile：18.14(Chemistry, Physical)We use the newly developed non collinear spin polarized density functional method to describe the tetrachlorides of element Rutherfordium (Rf) and its homologues. It is the first time that a real three-dimensional molecule is described with this method. Without any additional corrections (used so far for the atomic values) we get nearly complete agreement for all homologues and thus a good prediction for the unknown value for RfCl.
Takeda, Masayasu; Torikai, Naoya*; Ino, Takashi*; Tasaki, Seiji*
KENS Report-XIV, p.205 - 206, 2003/00
no abstracts in English
He neutron spin filters at J-PARC MLFOku, Takayuki
no journal, ,
We have been developing a He neutron spin filter (NSF) for the efficient utilization of pulsed neutrons, since the He NSF is effective for neutrons in the wide energy range. The He NSF is effective especially for neutrons with energy higher than several-tens-meV. It also can cover a large solid angle and polarize neutrons without deflecting them from their original trajectory, it is suitable for the analyzer for SANS and reflectometer instruments. In addition, the He NSF will be a key device in the application of recently developed magnetic field imaging technique by using polarized pulsed neutrons, since it can polarize a thick neutron beam without deteriorating projection image of the transmitted neutrons. In order to apply the He NSF to experiments at a pulsed neutron experimental facility such as the J-PARC, it is important to make the system stable and easy to setup and operate, because the system is located inside thick and bulky radiation shields for high energy gamma ray and neutrons. In this talk, we will report the development and application status of the He NSF at J-PARC MLF.
