Transverse asymmetry of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> rays from neutron-induced compound states of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>La</mml:mi><mml:mprescripts/><mml:none/><mml:mn>140</mml:mn></mml:mmultiscripts></mml:math>
Tomoki Yamamoto, Takuya Okudaira, Shunsuke Endo, Hiroyuki Fujioka, K. Hirota, Takashi Ino, Kohei Ishizaki, A. Kimura, Masaaki Kitaguchi, Jun Koga, So Makise, Y. Niinomi, Takayuki Oku, K. Sakai, Tatsushi Shima, Hirohiko M. Shimizu, S. Takada, Y. Tani, H. Yoshikawa, T. Yoshioka
Abstract
An $sp$-mixing model, which describes a compound nuclear reaction by mixing partial waves, predicts a correlation term in this reaction. A detailed study of the $sp$-mixing model is required to study the feasibility of a new type of time reversal symmetry violation search experiment. The correlation term ${\mathbit{\ensuremath{\sigma}}}_{n}\ifmmode\cdot\else\textperiodcentered\fi{}({\mathbit{k}}_{n}\ifmmode\times\else\texttimes\fi{}{\mathbit{k}}_{\ensuremath{\gamma}})$ in the $^{139}\mathrm{La}(\stackrel{P\vec}{n},\ensuremath{\gamma})$ reaction has been studied by measuring $\ensuremath{\gamma}$-ray and neutron energies utilizing epithermal polarized neutrons and germanium detectors. The transverse asymmetry for single $\ensuremath{\gamma}$-ray transition was measured to be $0.60\ifmmode\pm\else\textpm\fi{}0.19$ in the $p$-wave resonance.