MICROSCOPIC STUDY OF THE LI-7(N,GAMMA)LI-8 AND BE-7(P,GAMMA)B-8 REACTIONS IN A MULTICONFIGURATION 3-CLUSTER MODEL

被引：162

作者：

DESCOUVEMONT, P

BAYE, D

机构：

[1] Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, B-1050 Brussels, Campus Plaine

来源：

NUCLEAR PHYSICS A | 1994年 / 567卷 / 02期

关键词：

LI-7(N; GAMMA); E(CM)LESS-THAN-OR-EQUAL-TO-0.8; MEV; CALCULATED DELTA(THETA) VS E BE-7(P; E(CM)LESS-THAN-3; CALCULATED ASTROPHYSICAL S-FACTOR VS E-3 CLUSTER GENERATOR COORDINATE METHOD; NUCLEAR REACTIONS; NUCLEAR STRUCTURE; LI-8; B-8; CALCULATED MU; QUADRUPOLE MOMENT; NUCLEON WIDTH OF LEVELS; B(GAMMA); MULTI-CONFIGURATION 3-CLUSTER MODEL;

D O I：

10.1016/0375-9474(94)90153-8

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 three-cluster generator coordinate method is applied to the Li-7(n, gamma)Li-8 and Be-7(p, gamma)B-8 capture reactions. The B-8 (or Li-8) nucleus is defined by a mixing of (alpha + He-3)+p and (alpha + p)+ He-3 (or mirror) configurations. We investigate the sensitivity of different observables with respect to the nucleon-nucleon interaction by considering four different Volkov forces. For all of them, the model fairly reproduces most of the experimentally known spectroscopic properties of the 8B and 8Li mirror nuclei. Recent measurements of the quadrupole moments are well explained without a halo structure. The Li-7(n, gamma)Li-8 cross section supports the data of Imhof et al. rather than those of Wiescher et al. At zero energy, the Be-7(p, gamma)B-8 astrophysical S-factors slightly depend on the nucleon-nucleon interaction. They are consistent with the currently accepted value, but contradict lower estimates.

引用

页码：341 / 353

页数：13

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