Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (9): 141 doi: 10.1007/s41365-019-0663-6

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Stellar reaction rate of 55Ni(p,g)56Cu in type I X-ray bursts

Shao-Bo Ma1,2 • Li-Yong Zhang 3 • Jun Hu 1,2   

  1. 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  • Received:2019-05-15 Revised:2019-06-03 Accepted:2019-06-10
  • Contact: Li-Yong Zhang E-mail:liyongzhang@bnu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 11825504, 11490562, and 11675229), and the Major State Basic Research Development Program of China (No. 2016YFA0400503).
PDF ShareIt Export Citation
Shao-Bo Ma, Li-Yong Zhang, Jun Hu. Stellar reaction rate of 55Ni(p,g)56Cu in type I X-ray bursts.Nuclear Science and Techniques, 2019, 30(9): 141     doi: 10.1007/s41365-019-0663-6

Abstract: 56Cu is close to the waiting-point nucleus 56Ni and lies on the rapid proton capture (rp) process path in Type I X-ray bursts (XRBs). In this work, we obtained a revised thermonuclear reaction rate of 55Niðp; cÞ56Cu in the temperature region relevant to XRBs. This rate was recalculated based on the recent experimental level structure in 56Cu, the recently measured proton separation energy of Sp = 579.8(7.1) keV, together with shell-model calculation, and the mirror nuclear structure in 56Co. The associated uncertainties in the rates were estimated by a Monte Carlo method. Our revised rate is significantly different from the recent results, which were partially based on experimental results; in addition, we found that a result in a previous work was incorrect. We recommend our revised rate to be incorporated in the future astrophysical network calculations.

Key words: Nuclear astrophysics, Reaction rate, X-ray burst