Optical model calculations of heavy-ion target fragmentation
The fragmentation of target nuclei by relativistic protons and heavy ions is described within the context of a simple abrasion-ablation-final-state interaction model. Abrasion is described by a quantum mechanical formalism utilizing an optical model potential approximation. Nuclear charge distributions of the excited prefragments are calculated by both a hypergeometric distribution and a method based upon the zero-point oscillations of the giant dipole resonance. Excitation energies are estimated from the excess surface energy resulting from the abrasion process and the additional energy deposited by frictional spectator interactions of the abraded nucleons. The ablation probabilities are obtained from the EVA-3 computer program. Isotope production cross sections for the spallation of copper targets by relativistic protons and for the fragmenting of carbon targets by relativistic carbon, neon, and iron projectiles are calculated and compared with available experimental data.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center
- OSTI ID:
- 7260104
- Report Number(s):
- N-86-27063; NASA-TM-87692; L-16113
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABLATION
ABRASION
BARYON REACTIONS
CARBON
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COPPER
COSMIC RADIATION
ELEMENTS
FRAGMENTATION
HADRON REACTIONS
HEAVY ION REACTIONS
HEAVY IONS
IONIZING RADIATIONS
IONS
METALS
NONMETALS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OPTICAL MODELS
PROTON REACTIONS
RADIATIONS
TARGETS
TRANSITION ELEMENTS