Experimental Challenge to the Cosmological Li Problem

S. Kubono, T. Kawabata, N. Iwasa, J. J. He, S. Q. Hou

研究成果: Conference contribution

抄録

The cosmological Li problem, the overproduction of7Li in the big bang nucleosynthesis (BBN), still is one of the serious remaining problems for the big bang model. Several experiments were performed for the problem in recent years, especially, on the reaction channel of7Be+n. These efforts were summarized including our works by indirect methods. The7Be(n,α)4He reaction was found to have a major component of the p-wave contribution, not s-wave as thought previously. The contribution of this reaction for destruction of7Be can be concluded to be less effective than assumed before, and thus this reaction does not help to solve the Li problem. A new measurement of the7Be(n,p)7Li reaction was reported to be larger than before at low energies, and the7Be(n,p1)7Li* reaction is also shown to be significant for the Li problem by our new study at JAEA, suggesting a need of further work on this reaction for the Li problem. Other possibilities for7Be destruction was also discussed, especially by the7Be+d channel.

本文言語English
ホスト出版物のタイトルNuclei in the Cosmos XV
編集者Alba Formicola, Matthias Junker, Lucio Gialanella, Gianluca Imbriani
出版社Springer Science and Business Media, LLC
ページ45-51
ページ数7
ISBN(印刷版)9783030138752
DOI
出版ステータスPublished - 2019 1 1
イベント15th International Symposium on Nuclei in the Cosmos, NIC 2018 - L'Aquila, Italy
継続期間: 2018 6 242018 6 29

出版物シリーズ

名前Springer Proceedings in Physics
219
ISSN(印刷版)0930-8989
ISSN(電子版)1867-4941

Conference

Conference15th International Symposium on Nuclei in the Cosmos, NIC 2018
CountryItaly
CityL'Aquila
Period18/6/2418/6/29

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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