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Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the Be-7 + n Reactions Updates the Total Be-7 Destruction Rate
- Title
- Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the Be-7 + n Reactions Updates the Total Be-7 Destruction Rate
- Authors
- Hayakawa, S.; La Cognata, M.; Lamia, L.; Yamaguchi, H.; Kahl, D.; Abe, K.; Shimizu, H.; Yang, L.; Beliuskina, O.; Cha, S. M.; Chae, K. Y.; Cherubini, S.; Figuera, P.; Ge, Z.; Gulino, M.; Hu, J.; Inoue, A.; Iwasa, N.; Kim, A.; Kim, D.; Kiss, G.; Kubono, S.; La Commara, M.; Lattuada, M.; Lee, E. J.; Moon, J. Y.; Palmerini, S.; Parascandolo, C.; Park, S. Y.; Phong, V. H.; Pierroutsakou, D.; Pizzone, R. G.; Rapisarda, G. G.; Romano, S.; Spitaleri, C.; Tang, X. D.; Trippella, O.; Tumino, A.; Zhang, N. T.
- Ewha Authors
- 김동욱
- SCOPUS Author ID
- 김동욱
- Issue Date
- 2021
- Journal Title
- ASTROPHYSICAL JOURNAL LETTERS
- ISSN
- 2041-8205
2041-8213
- Citation
- ASTROPHYSICAL JOURNAL LETTERS vol. 915, no. 1
- Publisher
- IOP PUBLISHING LTD
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- The cosmological lithium problem (CLP) stems from the outstanding discrepancy between theoretical predictions and astronomical observations of primordial lithium abundances. For the radiogenic production of Li-7, Be-7 plays a pivotal role in the Big Bang nucleosynthesis (BBN). Nevertheless, the data for neutron-induced Be-7 destruction processes were still sparse, and especially lacked information on the contributions of transitions to the Li-7 excited states. In this work, we have determined the Be-7 (n,p(0))(7) Li, Be-7 (n,p(1))(7) Li*, and Be-7 (n,alpha)(4) R-matrix fit, providing an improved uncertainty evaluation of the (n,p(0)) (n,p(1)) (n,p(0)) (n,p(1)) PRIMAT. As a consequence, the present nuclear-physics data offers a reduction of the predicted Li-7 abundance by about one-tenth, which would impose a stricter constraint on BBN and head us in the correct direction to the CLP solution.
- DOI
- 10.3847/2041-8213/ac061f
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
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