FITPULS: a code for obtaining analytic fits to aggregate fission-product decay-energy spectra. [In FORTRAN]
The operation and input to the FITPULS code, recently updated to utilize interactive graphics, are described. The code is designed to retrieve data from a library containing aggregate fine-group spectra (150 energy groups) from fission products, collapse the data to few groups (up to 25), and fit the resulting spectra along the cooling time axis with a linear combination of exponential functions. Also given in this report are useful results for aggregate gamma and beta spectra from the decay of fission products released from /sup 235/U irradiated with a pulse (10/sup -4/ s irradiation time) of thermal neutrons. These fits are given in 22 energy groups that are the first 22 groups of the LASL 25-group decay-energy group structure, and the data are expressed both as MeV per fission second and particles per fission second; these pulse functions are readily folded into finite fission histories. 65 figures, 11 tables.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5237459
- Report Number(s):
- LA-8277-MS; TRN: 80-014350
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPUTER CODES
F CODES
FISSION PRODUCTS
BETA-MINUS DECAY
NEUTRON REACTIONS
THERMAL FISSION
URANIUM 235 TARGET
BETA SPECTRA
FORTRAN
GAMMA SPECTRA
STATISTICAL DATA
THERMAL NEUTRONS
BARYON REACTIONS
BARYONS
BETA DECAY
DATA
DECAY
ELEMENTARY PARTICLES
FERMIONS
FISSION
HADRON REACTIONS
HADRONS
INFORMATION
ISOTOPES
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PROGRAMMING LANGUAGES
RADIOACTIVE MATERIALS
SPECTRA
TARGETS
652016* - Nuclear Properties & Reactions
A=220 & above
Theoretical- Spontaneous & Induced Fission- (-1987)
651712 - Nuclear Properties & Reactions
A=90-149
Theoretical- Radioactive Decay- (-1987)