DIRECT PROCESSES IN 54-MEV LI-7 BREAKUP REACTIONS ON C-12 AND AU-197 TARGETS, AND THE EXTRACTION OF ASTROPHYSICAL CROSS-SECTIONS

被引：31

作者：

GAZES, SB

MASON, JE

ROBERTS, RB

TEICHMANN, SG

机构：

[1] Nuclear Structure Research Laboratory, University of Rochester, Rochester

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.68.150

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strong direct processes were observed for elastic breakup in 54-MeV Li-7 + C-12, Au-197 reactions. In the case of C-12, the observed Li-7 --> a + t direct-breakup yield was significantly larger than predicted by a Coulomb-breakup calculation, indicating the importance of the nuclear field. For Au-197, final-state interactions produced a strong distortion in the fragment energy spectra, as well as a modulation of the coincidence efficiency for different detector geometries. Such Coulomb effects are found to severely complicate the extraction of radiative-capture cross sections from direct-breakup data.

引用

页码：150 / 153

页数：4

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