Transverse asymmetry of individual $γ$-rays in the $^{139}$La($\vec{n}$, $γ$)$^{140}$La reaction
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Okuizumi, M. Auton, C. J. Endo, S. Fujioka, H. Hirota, K. Ino, T. Ishizaki, K. Kimura, A. Kitaguchi, M. Koga, J. Makise, S. Niinomi, Y. Oku, T. Okudaira, T. Sakai, K. Shima, T. Shimizu, H. M. Tada, H. Takada, S. Takahashi, S. Tani, Y. Yamamoto, T. Yoshikawa, H. Yoshioka, T. |
| author_facet | Okuizumi, M. Auton, C. J. Endo, S. Fujioka, H. Hirota, K. Ino, T. Ishizaki, K. Kimura, A. Kitaguchi, M. Koga, J. Makise, S. Niinomi, Y. Oku, T. Okudaira, T. Sakai, K. Shima, T. Shimizu, H. M. Tada, H. Takada, S. Takahashi, S. Tani, Y. Yamamoto, T. Yoshikawa, H. Yoshioka, T. |
| contents | The enhancement of the parity-violating asymmetry in the vicinity of $p$-wave compound nuclear resonances was observed for a variety of medium-heavy nuclei. The enhanced parity-violating asymmetry can be understood using the $s$-$p$ mixing model. The $s$-$p$ mixing model predicts several neutron energy-dependent angular correlations between the neutron momentum $\vec k_n$, neutron spin $\vecσ_n$, $γ$-ray momentum $\vec k_γ$, and $γ$-ray polarization $\vecσ_γ$ in the $(n,γ)$ reaction. In this paper, the improved value of the transverse asymmetry of $γ$-ray emissions, corresponding to a correlation term $\vecσ_n\cdot(\vec k_n\times\vec k_γ)$ in the $^{139}\mathrm{La}(\vec n,γ)^{140}\mathrm{La}$ reaction, and the transverse asymmetries in the transitions to several low excited states of $^{140}\mathrm{La}$ are reported. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18876 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Transverse asymmetry of individual $γ$-rays in the $^{139}$La($\vec{n}$, $γ$)$^{140}$La reaction Okuizumi, M. Auton, C. J. Endo, S. Fujioka, H. Hirota, K. Ino, T. Ishizaki, K. Kimura, A. Kitaguchi, M. Koga, J. Makise, S. Niinomi, Y. Oku, T. Okudaira, T. Sakai, K. Shima, T. Shimizu, H. M. Tada, H. Takada, S. Takahashi, S. Tani, Y. Yamamoto, T. Yoshikawa, H. Yoshioka, T. Nuclear Experiment The enhancement of the parity-violating asymmetry in the vicinity of $p$-wave compound nuclear resonances was observed for a variety of medium-heavy nuclei. The enhanced parity-violating asymmetry can be understood using the $s$-$p$ mixing model. The $s$-$p$ mixing model predicts several neutron energy-dependent angular correlations between the neutron momentum $\vec k_n$, neutron spin $\vecσ_n$, $γ$-ray momentum $\vec k_γ$, and $γ$-ray polarization $\vecσ_γ$ in the $(n,γ)$ reaction. In this paper, the improved value of the transverse asymmetry of $γ$-ray emissions, corresponding to a correlation term $\vecσ_n\cdot(\vec k_n\times\vec k_γ)$ in the $^{139}\mathrm{La}(\vec n,γ)^{140}\mathrm{La}$ reaction, and the transverse asymmetries in the transitions to several low excited states of $^{140}\mathrm{La}$ are reported. |
| title | Transverse asymmetry of individual $γ$-rays in the $^{139}$La($\vec{n}$, $γ$)$^{140}$La reaction |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2402.18876 |