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Radiation Protection Dosimetry 2004 110(1-4):53-56; doi:10.1093/rpd/nch154
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Radiation Protection Dosimetry Vol. 110 Nos. 1-4 © Oxford University Press 2004; all rights reserved

Double-differential heavy-ion production cross sections

T. M. Miller* and L. W. Townsend

Department of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996-2300, USA

* Corresponding author: tmiller7{at}utk.edu.

Current computational tools used for space or accelerator shielding studies transport energetic heavy ions either using a one-dimensional straight-ahead approximation or by dissociating the nuclei into protons and neutrons and then performing neutron and proton transport using Monte Carlo techniques. Although the heavy secondary particles generally travel close to the beam direction, a proper treatment of the light ions produced in these reactions requires that double-differential cross sections should be utilised. Unfortunately, no fundamental nuclear model capable of serving as an event generator to provide these cross sections for all ions and energies of interest exists currently. Herein, we present a model for producing double-differential heavy-ion production cross sections that uses heavy-ion fragmentation yields produced by the NUCFRG2 fragmentation code coupled with a model of energy degradation in nucleus–nucleus collisions and systematics of momentum distributions to provide energy and angular dependences of the heavy-ion production.


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