Description of cross sections for photonuclear reactions in the energy range between 7 and 140 MeV
A combination of the exciton and evaporation models is used to describe photonuclear reactions induced in light, medium-mass, and heavy nuclei by photons of energy in the range 7 {<=} E{sub {gamma} {<=}} 140 MeV. Two mechanisms of the photoexcitation of nuclei are considered. These are the formation of a giant dipole resonance at energies in the range E{sub {gamma} {<=}} 30 MeV and quasideuteron photoabsorption, which is dominant at energies in the region E{sub {gamma} {>=}} 40 MeV. The density of particle-hole states, which appears in the exciton model, is calculated on the basis of the Fermi gas model. The emission of two preequilibrium particles is taken into account in describing the quasideuteron reaction channel. The effect of isospin conservation on giant-dipole-resonance decay accompanied by photonucleon emission is examined. The model in question is used to describe cross sections for photon-induced reactions on {sup 26}Mg, {sup 54}Fe, {sup 112,118,119,124}Sn, and {sup 181}Ta nuclei.
- OSTI ID:
- 21405991
- Journal Information:
- Physics of Atomic Nuclei, Vol. 72, Issue 3; Other Information: DOI: 10.1134/S1063778809030041; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CROSS SECTIONS
DECAY
DIPOLES
EMISSION
EVAPORATION MODEL
EXCITON MODEL
FERMI GAS MODEL
IRON 54
ISOSPIN
MAGNESIUM 26
MEV RANGE
PARTICLE-HOLE MODEL
PHOTONS
PHOTONUCLEAR REACTIONS
RESONANCE
TANTALUM 181
TIN 124
ALKALINE EARTH ISOTOPES
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNESIUM ISOTOPES
MASSLESS PARTICLES
MATHEMATICAL MODELS
MULTIPOLES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
STABLE ISOTOPES
TANTALUM ISOTOPES
TIN ISOTOPES