Angular distribution of γ rays from neutron-induced compound states of la 140

T. Okudaira, S. Takada, K. Hirota, A. Kimura, M. Kitaguchi, J. Koga, K. Nagamoto, T. Nakao, A. Okada, K. Sakai, H. M. Shimizu, T. Yamamoto, T. Yoshioka

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

The angular distribution of individual γ rays, emitted from a neutron-induced compound-nuclear state via radiative capture reaction of La139(n,γ) has been studied as a function of incident neutron energy in the epithermal region by using germanium detectors. An asymmetry ALH was defined as (NL-NH)/(NL+NH), where NL and NH are integrals of low- and high-energy region of a neutron resonance respectively, and we found that ALH has the angular dependence of (Acosθγ+B), where θγ is the emitted angle of γ rays, with A=-0.3881±0.0236 and B=-0.0747±0.0105 in 0.74 eV p-wave resonance. This angular distribution was analyzed within the framework of interference between s- and p-wave amplitudes in the entrance channel to the compound-nuclear state, and it is interpreted as the value of the partial p-wave neutron width corresponding to the total angular momentum of the incident neutron combined with the weak matrix element, in the context of the mechanism of enhanced parity-violating effects. Additionally, we use the result to quantify the possible enhancement of the breaking of time-reversal invariance in the vicinity of the p-wave resonance.

元の言語英語
記事番号034622
ジャーナルPhysical Review C
97
発行部数3
DOI
出版物ステータス出版済み - 3 27 2018

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rays
angular distribution
neutrons
entrances
sands
energy
invariance
germanium
parity
angular momentum
asymmetry
interference
augmentation
detectors
matrices

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Angular distribution of γ rays from neutron-induced compound states of la 140. / Okudaira, T.; Takada, S.; Hirota, K.; Kimura, A.; Kitaguchi, M.; Koga, J.; Nagamoto, K.; Nakao, T.; Okada, A.; Sakai, K.; Shimizu, H. M.; Yamamoto, T.; Yoshioka, T.

:: Physical Review C, 巻 97, 番号 3, 034622, 27.03.2018.

研究成果: ジャーナルへの寄稿記事

Okudaira, T, Takada, S, Hirota, K, Kimura, A, Kitaguchi, M, Koga, J, Nagamoto, K, Nakao, T, Okada, A, Sakai, K, Shimizu, HM, Yamamoto, T & Yoshioka, T 2018, 'Angular distribution of γ rays from neutron-induced compound states of la 140', Physical Review C, 巻. 97, 番号 3, 034622. https://doi.org/10.1103/PhysRevC.97.034622
Okudaira T, Takada S, Hirota K, Kimura A, Kitaguchi M, Koga J その他. Angular distribution of γ rays from neutron-induced compound states of la 140. Physical Review C. 2018 3 27;97(3). 034622. https://doi.org/10.1103/PhysRevC.97.034622
Okudaira, T. ; Takada, S. ; Hirota, K. ; Kimura, A. ; Kitaguchi, M. ; Koga, J. ; Nagamoto, K. ; Nakao, T. ; Okada, A. ; Sakai, K. ; Shimizu, H. M. ; Yamamoto, T. ; Yoshioka, T. / Angular distribution of γ rays from neutron-induced compound states of la 140. :: Physical Review C. 2018 ; 巻 97, 番号 3.
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