PAPIN: A Fortran-IV program to calculate cross section probability tables, Bondarenko and transmission self-shielding factors for fertile isotopes in the unresolved resonance region
The Fortran IV code PAPIN has been developed to calculate cross section probability tables, Bondarenko self-shielding factors and average self-indication ratios for non-fissile isotopes, below the inelastic threshold, on the basis of the ENDF/B prescriptions for the unresolved resonance region. Monte-Carlo methods are utilized to generate ladders of resonance parameters in the unresolved resonance region, from average resonance parameters and their appropriate distribution functions. The neutron cross-sections are calculated by the single level Breit-Wigner (SLBW) formalism, with s, p and d-wave contributions. The cross section probability tables are constructed by sampling the Doppler-broadened cross sections. The various self-shielded factors are computed numerically as Lebesgue integrals over the cross section probability tables. The program PAPIN has been validated through extensive comparisons with several deterministic codes.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6029354
- Report Number(s):
- ORNL/TM-7883; ENDF-310; ON: DE81030436; TRN: 81-017029
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPUTER CODES
P CODES
FERTILE MATERIALS
NEUTRON REACTIONS
CAPTURE
TOTAL CROSS SECTIONS
BREIT-WIGNER FORMULA
CROSS SECTIONS
MONTE CARLO METHOD
NUMERICAL SOLUTION
RESONANCE
SELF-SHIELDING
VALIDATION
BARYON REACTIONS
HADRON REACTIONS
MATERIALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
SHIELDING
TESTING
652015* - Nuclear Properties & Reactions
A=220 & above
Theoretical- Nuclear Reactions & Scattering- (-1987)
651915 - Nuclear Properties & Reactions
A=190-219
Theoretical- Nuclear Reactions & Scattering- (-1987)