Angular distributions of high energy gamma rays from heavy-ion collisions via an n-p bremsstrahlung interpretation

Journal Article · Thu Oct 01 00:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.1387· OSTI ID:5853602

Remington, B A; Blann, M

We have explored the viability of incoherent np..gamma.. bremsstrahlung as the dominant mechanism for the production of high energy ..gamma.. rays in heavy-ion collisions by comparing the calculated relative angular distributions with experimental results. We have utilized the Boltzmann master equation model of heavy-ion collisions to decompose the reaction into first- and higher-order collision components in the assumed nucleon-nucleon cascade of the relaxation process. Within this decomposition we treat the ..gamma..-ray angular distribution of the first collision component by adopting a semiclassical np..gamma.. bremsstrahlung formula. The multiple collision component is assumed to contribute isotropically in the nucleus-nucleus center-of-mass system, and the Boltzmann master equation model enables us to weight these two components relative to one another. We then compare the predictions of our model with the available experimental results, finding generally favorable agreement between model and data. Within the uncertainties of our calculation and the data, the predicted angular distributions are consistent with an incoherent np..gamma.. bremsstrahlung mechanism as the source of high energy ..gamma.. rays in intermediate energy heavy-ion collisions.

• Research Organization: Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5853602
• Journal Information: Phys. Rev. C; (United States), Vol. 36:4
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HEAVY ION REACTIONS
BREMSSTRAHLUNG
ANGULAR DISTRIBUTION
BOLTZMANN EQUATION
CROSS SECTIONS
ENERGY SPECTRA
GAMMA RADIATION
NUCLEAR CASCADES
NUCLEON-NUCLEON INTERACTIONS
SEMICLASSICAL APPROXIMATION
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EQUATIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
IONIZING RADIATIONS
NUCLEAR REACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
RADIATIONS
SPECTRA
653003* - Nuclear Theory- Nuclear Reactions & Scattering