Nuclear-Data Input to the Classical r-Process: The Case of β-Decay Properties

被引：1

作者：

Kratz, Karl-Ludwig ^{[1
,2
]}

Farouqi, Khalil ^{[1
]}

Pfeiffer, Bernd ^{[1
,3
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Fachbereich Chem Pharm & Geowissensch, D-55128 D- Mainz, Germany

[2] Max Planck Inst Chem, Otto Hahn Inst, D-55128 Mainz, Germany

[3] Univ Giessen, Phys Inst 2, D-35392 Giessen, Germany

来源：

EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (VI): PHYSICS WITH SMALL ACCELERATORS | 2017年 / 1852卷

关键词：

beta-Decay properties; nuclear structure; nuclear models; nucleosynthesis; NEUTRON-EMISSION PROBABILITIES; GROUND-STATE MASSES; PROCESS ABUNDANCES; GROSS THEORY; HALF-LIVES; STABILITY; ISOTOPES; PARTICLE; FORMULA;

D O I：

10.1063/1.4984852

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Attempts to explain the origin of r-process elements in our Solar System (S.S.) still face entwined uncertainties, stemming from the extrapolation of nuclear structure from the line of beta-stability to the neutron drip line, inconsistent sources of different properties (e.g. nuclear masses and beta-decay quantities), and the poor understanding of astrophysical conditions, which are often hard to disentangle. In this paper, we will focus on the two interrelated gross beta-decay quantities T-1/2 and P-n. We compare the recent experimental T-1/2 of very neutron-rich isotopes in the Kr-36 to Sn-50 region (measured at RIKEN) with consistent QRPA(GT+ff) predictions based on the two global deformed mass models ETFSI-Q(1996) and FRDM(2012). Analyzing the observed agreement and remaining deficiencies of the T-1/2 trends, we predict the still unknown beta-delayed neutron-emission probabilities (P-n) for these isotopes using the empirical Kratz-Herrmann formula (KHF) and the microscopic ETFSI-Q/QRPA(GT+ff) model combination.

引用

页数：11

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