New probe of M1 and E1 strengths in GDR regions

T. Hayakawa, K. Ogata, S. Miyamoto, T. Mochizuki, K. Horikawa, S. Amano, K. Imazaki, D. Li, Y. Izawa, S. Chiba

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

The M1 strengths (or level density of 1+ states) are of importance for estimation of interaction strengths between neutrinos and nuclei for the study of the supernova neutrino-process. In 1957, Agodi predicted theoretically angular distribution of neutrons emitted from states excited via dipole transitions with linearly polarized gamma-ray beam at the polar angle of θ=90° should be followed by a simple function, a + b cos(2φ), where φ, is azimuthal angel. However, this theoretical prediction has not been verified over the wide mass region except for light nuclei as deuteron. We have measured neutron angular distributions with (polarized gamma, n) reactions on Au, Nal, and Cu. We have verified the Agodi's prediction for the first time over the wide mass region. This suggests that (polarized gamma, n) reactions may be useful tools to study M1 strengths in giant resonance regions.

本文言語英語
ホスト出版物のタイトルOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
出版社American Institute of Physics Inc.
ページ326-331
ページ数6
ISBN(印刷版)9780735412286
DOI
出版ステータス出版済み - 2014
外部発表はい
イベント12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, 日本
継続期間: 11月 18 201311月 21 2013

出版物シリーズ

名前AIP Conference Proceedings
1594
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

その他

その他12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
国/地域日本
CityTsukuba
Period11/18/1311/21/13

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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