EVIDENCE FOR ELASTOPLASTICITY IN DISSIPATIVE HEAVY-ION COLLISIONS

被引:18
作者
RHEIN, M [1 ]
BARTH, R [1 ]
DITZEL, E [1 ]
FELDMEIER, H [1 ]
KANKELEIT, E [1 ]
LIPS, V [1 ]
MUNTZ, C [1 ]
NORENBERG, W [1 ]
OESCHLER, H [1 ]
PIECHACZEK, A [1 ]
POLAI, W [1 ]
SCHALL, I [1 ]
机构
[1] GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT,GERMANY
关键词
D O I
10.1103/PhysRevLett.69.1340
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
From the measured yield of delta-electrons with energies between 3 and 8 MeV, emitted in the heavy-ion reaction Pb+Pb at 12 MeV/nucleon incident energy, a very fast deceleration of the nuclei in the approach phase is inferred which is much faster than predicted by the microscopic one-body dissipation model. Since the deceleration time is smaller than or comparable to the thermal equilibration time, the dissipation process is non-Markovian and therefore memory effects have to be included. This is performed on the basis of dissipative diabatic dynamics, which describes elastoplastic properties. The new diabatic one-body dissipation model reproduces the fast deceleration and the long nuclear contact time.
引用
收藏
页码:1340 / 1343
页数:4
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