☆ 4.7 Article

Nuclear landscape in covariant density functional theory

PHYSICS LETTERS B (2013)

期刊

PHYSICS LETTERS B

卷 726, 期 4-5, 页码 680-684

出版社

ELSEVIER SCIENCE BV

DOI: 10.1016/j.physletb.2013.09.017

关键词

Proton and neutron drip lines; Covariant density functional theory; Two-particle separation energies

类别

Astronomy & Astrophysics Physics, Nuclear Physics, Particles & Fields

资金

U.S. Department of Energy [DE-FG02-07ER41459]
DFG cluster of excellence Origin and Structure of the Universe
U.S. Department of Energy (DOE) [DE-FG02-07ER41459] Funding Source: U.S. Department of Energy (DOE)

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摘要

The neutron and proton drip lines represent the limits of the nuclear landscape. While the proton drip line is measured experimentally up to rather high Z values, the location of the neutron drip line for absolute majority of elements is based on theoretical predictions which involve extreme extrapolations. The first ever systematic investigation of the location of the proton and neutron drip lines in the covariant density functional theory has been performed by employing a set of the state-of-the-art parametrizations. Calculated theoretical uncertainties in the position of two-neutron drip line are compared with those obtained in non-relativistic DFT calculations. Shell effects drastically affect the shape of two-neutron drip line. In particular, model uncertainties in the definition of two-neutron drip line at Z similar to 54, N = 126 and Z similar to 82, N = 184 are very small due to the impact of spherical shell closures at N = 126 and 184. (C) 2013 Elsevier B.V. All rights reserved.

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