EPJ Web of Conferences (Jan 2019)

Measurement of P-Violation in 139La(n,γ)140La – a first step towards a T-Violation search

  • Yamamoto Tomoki,
  • Shimizu Hirohiko M.,
  • Kitaguchi Masaaki,
  • Hirota Katsuya,
  • Haddock Christopher C.,
  • Endo Shunsuke,
  • Ishizaki Kohei,
  • Sato Takumi,
  • Takada Shusuke,
  • Koga Jun,
  • Yoshioka Tamaki,
  • Ino Takashi,
  • Asahi Koichiro,
  • Momose Takamasa,
  • Iwata Takahiro,
  • Sakai Kenji,
  • Okudaira Takuya,
  • Oku Takayuki,
  • Kimura Atsushi,
  • Hino Masahiro,
  • Shima Tatsushi,
  • Yamagata Yutaka

DOI
https://doi.org/10.1051/epjconf/201921909002
Journal volume & issue
Vol. 219
p. 09002

Abstract

Read online

We performed a polarized neutron transmission asymmetry measurement utilizing the 139La(n,γ)140La reaction. This measurement involved the use of a recently developed 3He spin filter mounted on the J-PARC MLF beam line number 4 (BL04). The resulting value of the longitudinal asymmetry AL = (11.7 ± 1.1)% was found to be in good agreement with existing values in the literature suggesting that the method by which we polarize the neutron beam is not a significant source of uncertainty. This preliminary work represents a first step toward future measurements of the angular correlation in (n̅,Υ) reactions necessary in the search for enhanced T-Violation in compound nuclei.