PHENOMENOLOGICAL CALCULATION FOR NUCLEAR-MASSES AND CHARGE RADII

被引：66

作者：

DUFLO, J

机构：

[1] Laboratoire National Saturne (Saclay), Centre de Spectroscopie Nucléaire et de Spectroscopie de Masse

来源：

NUCLEAR PHYSICS A | 1994年 / 576卷 / 01期

关键词：

D O I：

10.1016/0375-9474(94)90737-4

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：

Masses for 1372 known nuclei with N greater-than-or-equal-to 28 and Z greater-than-or-equal-to 20, are calculated with a r.m.s. deviation of 385 keV. Only 12 numerical parameters are necessary, plus the definition of some functional forms and the specification of some region boundaries. Direct evidence is given for the need of terms linear in \N - Z\ or N - Z in any mass formula (''isospin drift''). Charge radii of 57 closed-shell nuclei are calculated with a three-parameter formula yielding a chi2 almost-equal-to 1. Very strong indications emerge in favour of an overall compression of matter with neutron excess (''isospin shrinkage''). A reasonably satisfactory fit to all known radii is also presented.

引用

页码：29 / 64

页数：36

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