Disentangling effects of potential shape in the fission rate of heated nuclei

被引：26

作者：

Gontchar, I. I. ^{[1
]}

Chushnyakova, M. V. ^{[1
]}

Aktaev, N. E. ^{[1
]}

Litnevsky, A. L. ^{[1
]}

Pavlova, E. G. ^{[1
]}

机构：

[1] Omsk State Transport Univ, Dept Chem & Phys, Omsk, Russia

来源：

PHYSICAL REVIEW C | 2010年 / 82卷 / 06期

关键词：

STATISTICAL-MODEL; DYNAMICS;

D O I：

10.1103/PhysRevC.82.064606

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 have compared the results of dynamical modeling of the fission process with predictions of the Kramers formulas. For the case of large dissipation, there are two of them: the integral rate R-I and its approximation R-O. As the ratio of the fission barrier height B-f to the temperature T reaches 4, any analytical rate is expected to agree with the dynamical quasistationary rate R-D within 2%. The latter has been obtained using numerical modeling with six different potentials. It has been found that the difference between R-O and R-D sometimes exceeds 20%. The features of the potentials used that are responsible for this disagreement are identified and studied. It is demonstrated that it is R-I, not R-O, that meets this expectation regardless of the potential used.

引用

页数：8

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