Global test of modified precompound decay models

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.1475· OSTI ID:5466329

Blann, M; Vonach, H K

A single parameter set was adopted for the hybrid and geometry dependent hybrid models. The nuclear density profile was modified for consistency with results of the Myers nuclear droplet model. Optical model parameters were modified to give better global results for inverse reaction cross sections in the precompound energy range up to 90 MeV. Two types of multiple precompound decay processes are defined, and the more important of the two is incorporated into the precompound decay formalism. This results in two to five orders of magnitude improvement in predicting /sup 202/Hg(p,2p) and /sup 202/Hg(p,2pn) product yields for proton energies up to 86 MeV. The global parameter set and formulation of this work is compared with (n,xn) and (n,p) spectra for 14 MeV incident neutrons, for (p,n) spectra with 18--90 MeV protons, and with (p,p') spectra for 39--90 MeV protons. The geometry dependent hybrid model gives the better overall agreement, in most cases within the 20--30 % limit of significance attached to the model. Some discussion is given of methods by which the calculations might be further improved.

• Research Organization: E-Division, Lawrence Livermore National Laboratory, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5466329
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651915* -- Nuclear Properties & Reactions
A=190-219
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
EXCITON MODEL
HADRON REACTIONS
MATHEMATICAL MODELS
MERCURY 202 TARGET
NEUTRON SPECTRA
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OPTICAL MODELS
PRECOMPOUND-NUCLEUS EMISSION
PROTON REACTIONS
PROTON SPECTRA
SPECTRA
TARGETS
TESTING