PROGRAM SUMMARY
Title of program:
SPECTRUM
Catalogue identifier:
ADLH
Ref. in CPC:
125(2000)221
Distribution format: gzip file
Operating system: MS-DOS/Windows95
High speed store required:
500K words
Number of bits in a word:
32
Number of lines in distributed program, including test data, etc:
6794
Programming language used: Fortran, Quickbasic
Computer: PC-Pentium 200MHz
Nature of physical problem:
Prompt fission neutron spectrum and average prompt neutron multiplicity
are calculated.
Method of solution
Prompt fission neutron spectrum and average prompt neutron multiplicity
are calculated in the frame of Los Alamos model with multiple fission
chances. Energy dependence of the compound nucleus cross sections of
inverse process and incident neutron energy dependence of model
parameters are considered.
Restrictions on the complexity of the problem
Only the neutrons evaporated prior to scission are considered, the
pre-equilibrium effects are neglected. The maximum number of compound
nuclei undergoing fission (or fission chances) is four.
Typical running time
Five minutes in the option of the energy dependence of the compound
nucleus cross sections of the inverse process and less than 1 minute in
the option of constant compound nucleus cross sections.
Unusual features of the code
Dependence on the incident neutron energy of model parameters, graphics
and possibility to compare the results with data of external input
files.
References
[1] Madland, D.G., Nix, J.R. Nucl. Sci. Eng. 81 (1982), 213-271.
[2] Madland, D.G., LaBauve, R.J., Nix, J.R. "Physics of Neutron Emission
in Fission", Proc. of a consultants meeting on physics of neutron
emission in fission, Mito, Japan (1988), IAEA INDC(NDS)-220 (1989),
259-281.
[3] Madland, D.G. "Post-scission fission theory", H4-SMR/1056-10,11,
Workshop on Nucl. Reac. Data and Nucl. Reactors, Physics, Design and
Safety, ICTP-Trieste, Italy (1998).