Stability of superheavy nuclei

被引：27

作者：

Pomorski, K. ^{[1
]}

Nerlo-Pomorska, B. ^{[1
]}

Bartel, J. ^{[2
]}

Schmitt, C. ^{[2
]}

机构：

[1] Uniwersytet Marii Curie Sklodowskiej, Katedra Fiz Teoret, PL-20031 Lublin, Poland

[2] Univ Strasbourg, CNRS, IPHC, F-67037 Strasbourg, France

来源：

PHYSICAL REVIEW C | 2018年 / 97卷 / 03期

关键词：

GROUND-STATE MASSES; SPONTANEOUS FISSION; DEFORMATION ENERGIES; HEAVIEST ELEMENTS; HEAVY-NUCLEI; LIQUID-DROP; MODEL; PROBABILITIES; BARRIERS; SCISSION;

D O I：

10.1103/PhysRevC.97.034319

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 potential-energy surfaces of an extended set of heavy and superheavy even-even nucleiwith 92 <= Z <= 126 and isospins 40 <= N-Z <= 74 are evaluated within the recently developed Fourier shape parametrization. Ground-state and decay properties are studied for 324 different even-even isotopes in a four-dimensional deformation space, defined by nonaxiality, quadrupole, octupole, and hexadecapole degrees of freedom. Nuclear deformation energies are evaluated in the framework of the macroscopic-microscopic approach, with the Lublin-Strasbourg drop model and a Yukawa-folded mean-field potential. The evolution of the ground-state equilibrium shape (and possible isomeric, metastable states) is studied as a function of Z and N. alpha-decay Q values and half-lives, as well as fission-barrier heights, are deduced. In order to understand the transition from asymmetric to symmetric fission along the Fm isotopic chain, the properties of all identified fission paths are investigated. Good agreement is found with experimental data wherever available. New interesting features about the population of different fission modes for nuclei beyond Fm are predicted.

引用

页数：16

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