Double-differential light-ion production cross sections.
Codes used for space radiation shielding studies typically transport light-ions from the incident cosmic ray spectrum using either a one-dimensional straight-ahead approximation or in three dimensions, often without accounting for their breakup. Light-ions are also produced by breakup of energetic heavy ions in target materials. Herein, we present cross section models that can be used to predict double-differential light-ion production cross sections. Deuteron breakup is based on a parameterization of the total reaction cross sections. Alpha fragmentation utilizes a parameterization based on an abrasion-ablation model that has been augmented by experimental data. Neutron and proton production is modelled with a quantum mechanical abrasion-ablation-coalescence model. This same model is also used to predict cross sections for triton and 3He breakup. Finally, energies and emission angles for particles other than nucleons are specified using a model of energy degradation in nucleus-nucleus collisions and systematics of momentum distributions.
Miller
T M
TM
Department of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996-2300, USA. tmiller7@utk.edu
Townsend
L W
LW
D000465:Algorithms; D003198:Computer Simulation; D007477:Ions; D018499:Linear Energy Transfer; D008956:Models, Chemical; D009502:Neutrons; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods; D011868:Radioisotopes / Q000032:analysis* / Q000737:chemistry*; D011874:Radiometry / Q000379:methods*
D007477:Ions; D011868:Radioisotopes