6,7Li+27Al reactions close to and below the Coulomb barrier

被引：1

作者：

Kuehtreiber, J. ^{[1
]}

Hille, P. ^{[1
]}

Forstner, O. ^{[1
,2
]}

Friedmann, H. ^{[1
]}

Pavlik, A. ^{[1
]}

Priller, A. ^{[1
]}

机构：

[1] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

[2] Univ Jena, Inst Opt & Quantenelekt, D-07743 Jena, Germany

来源：

PHYSICAL REVIEW C | 2021年 / 103卷 / 06期

关键词：

FUSION CROSS-SECTIONS; BREAKUP; SYSTEM; OXYGEN;

D O I：

10.1103/PhysRevC.103.064605

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 reactions Li-6,Li-7+Al-27 were compared with the reactions O-17,O-18+O-16 which form the same compound nuclei S-33,S-34. Cross-section data for the reactions Li-6,Li-7+Al-27 were derived from experimentally determined gamma-ray production cross sections for transitions in several residual nuclei. For the reactions O-17,O-18+O-16 experimental results from the literature were used. It could be shown that the weakly bound projectiles Li-6,Li-7 undergo not only fusion processes, but also breakup reactions quite in contrast to the tightly bound projectiles O-18 and O-17, respectively. Especially below the Coulomb barrier such direct reactions play an important role in competition to complete fusion. Calculations based on the statistical model agree well with the available data for O-17,O-18+O-16, but failed to represent the behavior of the experimentally determined production cross sections for the evaporation residues in the reactions Li-6,Li-7+Al-27. But coupled-channel codes and calculations based on a nucleus-nucleus proximity potential are able to reproduce the energy dependence of the complete fusion cross sections.

引用

页数：8

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