A modular apparatus for use in high-precision measurements of parity violation in polarized eV neutron transmission
A modular apparatus for use in high-precision measurements of parity violation in polarized eV neutron transmission
复制标题
一种用于高精度测量偏振 eV 中子传输中奇偶校验破坏的模块化装置
DOI:
10.1016/j.nima.2020.163961
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Dickerson, K.A.
中科院分区:
文献类型:
--
作者:
Schaper, D.C.;Auton, C.;Barrón-Palos, L.;Borrego, M.;Chavez, A.;Cole, L.;Crawford, C.B.;Curole, J.;Dhahri, H.;Dickerson, K.A.
We describe a modular apparatus for use in parity-violation measurements in epithermal neutron–nucleus resonances with high instantaneous neutron fluxes at the Manuel Lujan Jr. Neutron Scattering Center at Los Alamos National Laboratory. This apparatus is designed to conduct high-precision measurements of the parity-odd transmission asymmetry of longitudinally polarized neutrons through targets containing nuclei with p-wave neutron–nucleus resonances in the 0.1–10 eV energy regime and to accommodate a future search for time reversal violation in polarized neutron transmission through polarized nuclear targets. The apparatus consists of an adjustable neutron and gamma collimation system, a 3 He-4 He ion chamber neutron flux monitor, two identical cryostats for target cooling, an adiabatic eV-neutron spin flipper, a near-unit efficiency 6 Li-7 Li scintillation detector operated in current mode, a flexible CAEN data acquisition system, and a neutron spin filter based on spin-exchange optical pumping of 3 He gas. We describe the features of the apparatus design devoted to the suppression of systematic errors in parity-odd asymmetry measurements. We describe the configuration of the apparatus used to conduct a precision measurement of parity violation at the 0.7 eV p-wave resonance in 139 La which employs two identical 139 La targets, one to polarize the beam on the p-wave resonance using the weak interaction and one to analyze the polarization.
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影响因子:
2.4
作者:
FLOWERS, JL;PETLEY, BW;RICHARDS, MG
通讯作者:
RICHARDS, MG
DOI:
10.1016/j.nima.2018.03.055
发表时间:
2018-07-01
影响因子:
1.4
作者:
Musgrave, M. M.;Baessler, S.;Wilburn, W. S.
通讯作者:
Wilburn, W. S.
DOI:
--
发表时间:
1996
期刊:
Physical review. C, Nuclear physics
影响因子:
--
作者:
Skoy;Sharapov;Gundorin;Popov;Prokofichev;Roberson;Mitchell
通讯作者:
Mitchell
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
P. Koehler
通讯作者:
P. Koehler
DOI:
--
发表时间:
1992
期刊:
Physical review. C, Nuclear physics
影响因子:
--
作者:
Frankle;Bowman;Bush;Delheij;Gould;Haase;Knudson;Mitchell;Penttilä;Postma;Roberson;Seestrom;Szymański;Yuan;Zhu
通讯作者:
Zhu