Abrasion-ablation model description of galactic heavy-ion fragmentation
The fragmentation of high-energy galactic heavy ions by nuclear interactions with arbitrary target nuclei is described within the context of a simple abrasion-ablation fragmentation model. The abrasion part of the theory utilizes a quantum-mechanical formalism based upon an optical model potential approximation to the exact nucleus-nucleus multiple-scattering series. Nuclear charge distributions of the excited prefragments are calculated using either a hypergeometric distribution or a method based upon the zero-point oscillations of the giant dipole resonance. The excitation energy of the prefragment is estimated from the geometric clean-cut abrasion-ablation model. The decay probabilities for the various particle emission channels, in the ablation stage of the fragmentation, are obtained from the EVAP-4 Monte Carlo computer program. Elemental production cross sections for 1.88-GeV/nucleon iron colliding with carbon, silver, and lead targets are calculated and compared with experimental data and with the predictions from the semiempirical relations of Silberberg and Tsao.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center
- OSTI ID:
- 6857597
- Report Number(s):
- N-84-22396; NASA-TP-2305; L-15763
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ABLATION
ABRASION
BARYON-BARYON INTERACTIONS
CARBON
CHARGE DISTRIBUTION
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
COSMIC RADIATION
DIPOLE MOMENTS
ELEMENTS
ENERGY RANGE
FRAGMENTATION
FUNCTIONS
GEV RANGE
GEV RANGE 01-10
HADRON-HADRON INTERACTIONS
HEAVY IONS
HYPERGEOMETRIC FUNCTIONS
INTERACTIONS
IONIZING RADIATIONS
IONS
IRON IONS
LEAD
MECHANICS
METALS
MONTE CARLO METHOD
NONMETALS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
QUANTUM MECHANICS
RADIATIONS
RESONANCE
SILVER
TARGETS
TRANSITION ELEMENTS