EPJ Web of Conferences (Jan 2019)

Measurement of the angular distribution of prompt gamma-rays emitted in the 117Sn(n, γ) reaction for a T-violation search

  • Koga Jun,
  • Takada Shusuke,
  • Yoshioka Tamaki,
  • Shimizu Hirohiko M.,
  • Hirota Katsuya,
  • Oi Norio,
  • Yamamoto Tomoki,
  • Ito Ikuya,
  • Ishizaki Kohei,
  • Endo Shunsuke,
  • Sato Takumi,
  • Kitaguchi Masaaki,
  • Haddock Christopher C.,
  • Okudaira Takuya,
  • Sakai Kenji,
  • Kimura Atsushi

DOI
https://doi.org/10.1051/epjconf/201921909004
Journal volume & issue
Vol. 219
p. 09004

Abstract

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It is theoretically suggested that the violation of charge conjugation and parity symmetry (CP-violation) could be enhanced in several compound nuclear reactions. According to the CPT theorem the violation of time-reversal symmetry (T-violation) would be enhanced too. The experimental sensitivity to find a T-violating effect in neutron-induced compound nuclear reactions depends on the value of a spin factor κ(J), which is a parameter specific for each nuclide. It can be determined from the angular dependence of γ-ray emission in (n,γ) reactions induced near a p-wave resonance. In this paper, the measurement result and the analysis status of experiments using the target nucleus 117Sn are reported.