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Neutron spectra, recoil momenta and PI/sup 0/ production cross sections for reactions induced by 10-100 MeV/nucleon heavy ions

Conference ·
OSTI ID:5310100
The Boltzmann master equation model has been applied to the question of precompound nucleon de-excitation of reactions induced by 10 to 100 MeV/nucleon (c.m.) heavy ions. Test systems of /sup 16/O + /sup 60/Ni and /sup 27/Al + /sup 86/Kr were selected. Experimental neutron spectra in coincidence with evaporation residue and fission fragments from the /sup 20/Ne + /sup 165/Ho system (due to Holub, et al.) were reproduced quite well by the master equation with exciton numbers between 20 and 23. Results show major fractions of the excitation and up to 35 nucleons removed during the coalescence-equilibration period. The linear momentum transfer predicted by the master equation is shown to be in good agreement with a broad range of data. Extension of the master equation to predict sub-threshold PI/sup 0/ production cross sections is shown to give satisfactory agreement with a large number of experimental results. 48 refs., 8 figs., 7 tabs.
Research Organization:
Lawrence Livermore National Lab., CA (USA)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5310100
Report Number(s):
UCRL-93247; CONF-8509159-1; ON: DE850178315
Country of Publication:
United States
Language:
English

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Related Subjects

651615* -- Nuclear Properties & Reactions
A=59-89
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
651815 -- Nuclear Properties & Reactions
A=150-189
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 REACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DE-EXCITATION
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMI GAS MODEL
HADRONS
HEAVY ION REACTIONS
HOLMIUM 165 TARGET
INFORMATION
KRYPTON 86 TARGET
MATHEMATICAL MODELS
MESONS
MULTIPLE PRODUCTION
NEON 20 REACTIONS
NEUTRON SPECTRA
NICKEL 60 TARGET
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN 16 REACTIONS
PARTICLE PRODUCTION
PIONIZATION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RECOILS
SPECTRA
TARGETS
THEORETICAL DATA