Preliminary Results of Investigating Precompound Emission of Light Fragments in Spallation Reactions, Summer 2012 (original) (raw)

Abstract

Emission of light fragments (LF) from nuclear reactions is an open question. Different reaction mechanisms contribute to their production; the relative roles of each, and how they change with incident energy, mass number of the target, and the type and emission energy of the fragments is not completely understood. None of the available models are able to accurately predict emission of LF from arbitrary reactions. However, the ability to describe production of LF (especially at energies > 30 MeV) from many reactions is important for different applications, such as cosmic-ray induced Single Event Upsets (SEUs), radiation protection, and cancer therapy with proton and heavy-ion beams, to name just a few. The Cascade-Exciton Model (CEM), version 03.03 and the Los Alamos version of the Quark-Gluon String Model (LAQGSM), version 03.03 event generators in Monte Carlo N-Particle Transport Code version 6 (MCNP6), describe quite well the spectra of fragments with sizes up to 4He across a b...

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