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Transverse asymmetry of individual $$gamma$$ rays in the $$^{139}$$La($$overrightarrow{n},gamma$$)$$^{140}$$La reaction

Okuizumi, Mao*; Auton, C. J.*; Endo, Shunsuke   ; Fujioka, Hiroyuki*; Hirota, Katsuya*; Ino, Takashi*; Ishizaki, Kohei*; Kimura, Atsushi   ; Kitaguchi, Masaaki*; Koga, Jun*; Makise, So*; Niinomi, Yudai*; Oku, Takayuki   ; Okudaira, Takuya*; Sakai, Kenji ; Shima, Tatsushi*; Shimizu, Hirohiko*; Tada, Hiroki*; Takada, Shusuke*; Takahashi, Shingo*; Tani, Yuika*; Yamamoto, Tomoki*; Yoshikawa, Hiromoto*; Yoshioka, Tamaki*

The observed enhancement of Parity Violation in the vicinity of p-wave compound nuclear resonances for a variety of medium-heavy nuclei can be understood using the sp-mixing model. The sp-mixing model predicts several neutron energy-dependent angular correlations between the spin and momentum of neutron and $$gamma$$-ray emitted from (n,$$gamma$$) reactions. In this work, the correlation term $$overrightarrow{sigma_textrm{n}}cdot(overrightarrow{k_textrm{n}}timesoverrightarrow{k_gamma})$$ in the $$^{139}$$La($$overrightarrow{n}$$,$$gamma$$)$$^{140}$$La$$^ast$$ reaction was measured precisely and a significant transverse asymmetry was found in the transition to the excited states of $$^{140}$$La.

Language

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English

Journal

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Physical Review C

Volume

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111

Number

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3

Pages

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p.034611_1 - 034611_6

Publication Year/Month

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2025/03

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Held date

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Patent information

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Paper URL

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https://doi.org/10.1103/PhysRevC.111.034611

DOI for research data

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Link to research data related to this paper/report.

Keywords

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中性子ビーム; 偏極中性子; 原子核反応; La-139

Research Facility

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J-PARC物質・生命科学実験施設  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

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