An abrasion-ablation model description of galactic heavy-ion fragmentation

Details An abrasion-ablation model description of galactic heavy-ion fragmentation An abrasion-ablation model description of galactic heavy-ion fragmentation

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aamd.book.....t&link_type=abstract

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Computer Science

Ablation, Abrasion, Fragmentation, Galactic Radiation, Heavy Ions, Nuclear Interactions, Quantum Mechanics, Charge Distribution, Dipole Moments, Hypergeometric Functions, Monte Carlo Method, Resonance, Scattering Cross Sections

Scientific paper

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.

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