arXiv 2005.000022020-05physics.ins-detastro-ph.COnucl-ex

大爆炸核合成能量下D（p，gamma）3He截面改进测量的装置调试

Setup commissioning for an improved measurement of the D(p,gamma)3He cross section at Big Bang Nucleosynthesis energies

V. Mossa, K. Stöckel, F. Cavanna, F. Ferraro, M. Aliotta, F. Barile, D. Bemmerer, A. Best, A. Boeltzig, C. Broggini, C. G. Bruno, A. Caciolli, L. Csedreki, T. C… 展开作者

V. Mossa, K. Stöckel, F. Cavanna, F. Ferraro, M. Aliotta, F. Barile, D. Bemmerer, A. Best, A. Boeltzig, C. Broggini, C. G. Bruno, A. Caciolli, L. Csedreki, T. Chillery, G. F. Ciani, P. Corvisiero, T. Davinson, R. Depalo, A. Di Leva, Z. Elekes, E. M. Fiore, A. Formicola, Zs. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, G. Gyürky, G. Imbriani, M. Junker, I. Kochanek, M. Lugaro, L. E. Marcucci, P. Marigo, E. Masha, R. Menegazzo, F. R. Pantaleo, V. Paticchio, R. Perrino, D. Piatti, P. Prati, L. Schiavulli, O. Straniero, T. Szücs, M. P. Takács, D. Trezzi, S. Zavatarelli, G. Zorzi

备注：: 11 pages, 11 figures
DOI：: 10.1140/epja/s10050-020-00149-1

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摘要：

在大爆炸核合成过程中氘的产生和破坏所涉及的反应中，燃烧氘的D（p，gamma）3He反应具有最大的不确定性，并限制了原始氘丰度的理论估计精度。在这里，我们报告的结果，用于测量的D（p，γ）3He反应的横截面在实验室的地下核天体物理学的格兰萨索实验室（意大利）的实验装置的仔细调试。试运行旨在最大限度地减少测量截面中的所有系统不确定性来源。所获得的总体系统误差（<3%）将能够改进BBN氘丰度的预测。

英文摘要：

Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)3He reaction has the largest uncertainty and limits the precision of theoretical estimates of primordial deuterium abundance. Here we report the results of a careful commissioning of the experimental setup used to measure the cross-section of the D(p,gamma)3He reaction at the Laboratory for Underground Nuclear Astrophysics of the Gran Sasso Laboratory (Italy). The commissioning was aimed at minimising all sources of systematic uncertainty in the measured cross sections. The overall systematic error achieved (< 3 %) will enable improved predictions of BBN deuterium abundance.

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