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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 Rateopen access
- Authors
- Hayakawa, S[Hayakawa, S.]; La Cognata, M[La Cognata, M.]; Lamia, L[Lamia, L.]; Yamaguchi, H[Yamaguchi, H.]; Kahl, D[Kahl, D.]; Abe, K[Abe, K.]; Shimizu, H[Shimizu, H.]; Yang, L[Yang, L.]; Beliuskina, O[Beliuskina, O.]; Cha, SM[Cha, S. M.]; Chae, KY[Chae, K. Y.]; Cherubini, S[Cherubini, S.]; Figuera, P[Figuera, P.]; Ge, Z[Ge, Z.]; Gulino, M[Gulino, M.]; Hu, J[Hu, J.]; Inoue, A[Inoue, A.]; Iwasa, N[Iwasa, N.]; Kim, A[Kim, A.]; Kim, D[Kim, D.]; Kiss, G[Kiss, G.]; Kubono, S[Kubono, S.]; La Commara, M[La Commara, M.]; Lattuada, M[Lattuada, M.]; Lee, EJ[Lee, E. J.]; Moon, JY[Moon, J. Y.]; Palmerini, S[Palmerini, S.]; Parascandolo, C[Parascandolo, C.]; Park, SY[Park, S. Y.]; Phong, VH[Phong, V. H.]; Pierroutsakou, D[Pierroutsakou, D.]; Pizzone, RG[Pizzone, R. G.]; Rapisarda, GG[Rapisarda, G. G.]; Romano, S[Romano, S.]; Spitaleri, C[Spitaleri, C.]; Tang, XD[Tang, X. D.]; Trippella, O[Trippella, O.]; Tumino, A[Tumino, A.]; Zhang, NT[Zhang, N. T.]
- Issue Date
- Jul-2021
- Publisher
- IOP PUBLISHING LTD
- Citation
- ASTROPHYSICAL JOURNAL LETTERS, v.915, no.1
- Indexed
- SCIE
SCOPUS
- Journal Title
- ASTROPHYSICAL JOURNAL LETTERS
- Volume
- 915
- Number
- 1
- ISSN
- 2041-8205
- 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.
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