Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] acvq_v1_0.gz(34 Kbytes)
Manuscript Title: PROBFIS: a program for subbarrier prompt and isomeric fission probabilities calculation for even-even nuclei.
Authors: G. Vladuca, M. Sin, A. Tudora
Program title: PROBFIS
Catalogue identifier: ACVQ_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 83(1994)266
Programming language: Quickbasic.
Computer: PC AT 286.
Operating system: MS DOS 6.
RAM: 500K words
Word size: 16
Peripherals: disc.
Keywords: Nuclear physics, Double humped Barrier-fragment, Vibrational states, Prompt fission Probability, Isomeric fission Probability, Half time for isomeric Heavy ion, Branching ratio for Isomeric fission, Jwkb.
Classification: 17.7.

Nature of problem:
Prompt and isomeric fission probabilities are calculated for even-even nuclei in subbarrier region.

Solution method:
The fission probability has been calculated assuming a double-humped fission barrier. The damping of the vibrational states in the second minimum has been treated by means of an imaginary potential. The penetrability through the barrier has been calculated in JWKB approximation.

Restrictions:
The only competitive process in the first well is gamma-decay. The maximum number of vibrational states considered is 6 and the maximum value of spin is 10. Only discrete fission channels are considered.

Unusual features:
graphics

Running time:
1 minute

References:
[1] B.B. Black, O. Hansen, H.C. Britt, J.D. Garrett, Phys.Rev.C9 (1974) p. 1924
[2] N. Froman and P.O. Froman, JWKB Approximation (North Holland, 1965)
[3] B.S. Bhandari, Phys.Rev.C 19 (1979) p.1820, Phys.Rev.C42, (1990) p. 1443