TIME-DEPENDENT SCHRODINGER APPROACH TO SUBBARRIER FISSION

被引：15

作者：

CARJAN, N ^{[1
]}

SEROT, O ^{[1
]}

STROTTMAN, D ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545

来源：

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1994年 / 349卷 / 3-4期

关键词：

D O I：

10.1007/BF01288994

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 time-dependent Schrodinger equation for the fission of At-213 through a one-dimensional potential barrier was solved numerically within a finite spatial grid. Several initial quasi-stationary vibrational states at and below the top of the barrier were considered. The time dependence of the decay rate lambda(t) was calculated. The non-exponential evolution of the process in the very early stages (less than or equal to 10(-20) s) differs considerably from the asymptotic (stationary) one. Fission is therefore delayed by the sum of this preexponential time, of the tunneling time and of the time necessary for the descent from the outer turning point to the scission point. These non-dissipative quantum times play the same role as the classical transient times usually included in the analyses of experimental data on pre-scission emission of light particles and gamma rays.

引用

页码：353 / 355

页数：3

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