Impact of nuclearβ-decay rates on the r-process rare-earth peak abundances

被引：3
|
作者：
Hao, Y. W. [1 ,2 ]
Niu, Y. F. [1 ,2 ]
Niu, Z. M. [1 ,3 ]
机构：
[1] Lanzhou Univ, MOE Frontiers Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
[3] Anhui Univ, Sch Phys & Optoelect Engn, Hefei 230601, Peoples R China
来源：
PHYSICAL REVIEW C | 2023年 / 108卷 / 06期
基金：
中国国家自然科学基金;
关键词：
ELEMENTS;
D O I：
10.1103/PhysRevC.108.L062802
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The impact of n-decay rates of an individual nucleus on the r-process rare-earth peak abundances has been studied in different astrophysical scenarios. The variation in n-decay rates by a factor of 10 can produce large abundance uncertainties in the rare-earth mass region, while fission deposition can significantly reduce this uncertainty, which is not a suggested case by the current simulations of neutron-star mergers with moderately neutron-rich conditions where fission is less active. The most impactful nuclei include even-neutron-number (N) nuclei on the early r-process equilibrium path or r-process freeze-out path and nuclei with N = 100, 102, and 104. It is found that the variations in the n-decay rate of nuclei located to the left and right sides of the r-process freeze-out path have significant different effects on rare-earth peak abundance.
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页数：7
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