FAST FUSION AND QUASIFISSION - 2 POSSIBLE MASS-RELAXATION MODES IN ASYMMETRIC HEAVY-ION COLLISIONS LEADING TO SYSTEMS WITH ZTOT=108

被引：20

作者：

GIPPNER, P

BROSA, U

FELDMEIER, H

SCHMIDT, R

机构：

[1] FORSCHUNGSZENTRUM JULICH, HLRZ, W-5170 JULICH 1, GERMANY

[2] GESELL SCHWERIONENFORSCH GMBH, W-6100 DARMSTADT, GERMANY

[3] TECH UNIV DRESDEN, SEKT PHYS, O-8027 DRESDEN, GERMANY

来源：

PHYSICS LETTERS B | 1990年 / 252卷 / 02期

关键词：

D O I：

10.1016/0370-2693(90)90861-Y

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The qualitative differences between the experimental mass distributions observed in the collisions S-32(192 MeV) + U-238 and Ar-40(220 MeV) + Th-232 leading to the same compound system Z(tot) = 108 are explained within a simple diffusion model. It is demonstrated that there generally exist two different modes of the mass relaxation process. In the "fast fusion" channel the mass-asymmetry increases rapidly, whereas in the "quasifission" process the system drives slowly towards symmetry. The relative contributions of both channels to the cross section depend sensitively on the position of the injection point in the driving potential.

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页码：198 / 202

页数：5

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