Breakup mechanisms in heavy-ion collisions at low energies

被引:28
|
作者
Shvedov, L. [1 ]
Colonna, M. [1 ]
Di Toro, M. [1 ,2 ]
机构
[1] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy
[2] Univ Catania, Dept Phys & Astron, Catania, Italy
来源
PHYSICAL REVIEW C | 2010年 / 81卷 / 05期
关键词
MACROSCOPIC MODEL; NUCLEAR; FISSION; INSTABILITIES; FLUCTUATIONS; FRAGMENTATION; DISTRIBUTIONS; DISSIPATION; EQUATION; DENSITY;
D O I
10.1103/PhysRevC.81.054605
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
We investigate reaction mechanisms occurring in heavy-ion collisions at low energy (similar to 20 MeV/nucleon). In particular, we focus on the competition between fusion and breakup processes (deep inelastic and fragmentation) in semiperipheral collisions, where the formation of excited systems under various conditions of shape and angular momentum is observed. Adopting a Langevin treatment for the dynamical evolution of the system configuration, described in terms of shape observables such as quadrupole and octupole moments, we derive fusion and fission probabilities, from which the corresponding fusion and breakup cross sections can finally be evaluated. The dependence of the results on shape, angular momentum, and excitation energy is discussed.
引用
收藏
页数:9
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