利用放射性离子束对天体物理 p 过程反应截面的首次直接测量
核实验
2021-09-15 v1
摘要
我们利用能量为 2.4 和 2.7 A MeV 的 83Rb 放射性束，以逆运动学方式首次直接测量了 83Rb(p,g) 辐射俘获反应截面。在有效相对动能 Ecm = 2.393 MeV（位于核坍缩超新星相关能量窗口内）处测得的截面小于统计模型计算的预言值。这导致天体物理 p 过程中产生的 84Sr 丰度高于先前计算的结果。此外，本数据与理论预言的偏差表明，显然有必要对涉及不稳定弹核的 p 过程反应开展进一步的实验研究。
引用
@article{arxiv.2109.06775,
title = {First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam},
author = {G. Lotay and S. A. Gillespie and M. Williams and T. Rauscher and M. Alcorta and M. Amthor and C. A. Andreoiu and D. Baal and G. C. Ball and S. S. Bhattacharjee and H. Behnamian and V. Bildstein and C. Burbadge and W. N. Catford and D. T. Doherty and N. E. Esker and F. H. Garcia and A. B. Garnsworthy and G. Hackman and S. Hallam and K. A. Hudson and S. Jazrawi and E. Kasanda and A. R. L. Kennington and Y. H. Kim and A. Lennarz and R. S. Lubna and C. R. Natzke and N. Nishimura and B. Olaizola and C. Paxman and A. Psaltis and C. E. Svensson and J. Williams and B. Wallis and D. Yates and D. Walter and B. Davids},
journal= {arXiv preprint arXiv:2109.06775},
year = {2021}
}
备注
6 pages, 4 figures, published in Physical Review Letters