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Coulomb effects in low-energy nuclear fragmentationEarly versions of the Langley nuclear fragmentation code NUCFRAG (and a publicly released version called HZEFRG1) assumed straight-line trajectories throughout the interaction. As a consequence, NUCFRAG and HZEFRG1 give unrealistic cross sections for large mass removal from the projectile and target at low energies. A correction for the distortion of the trajectory by the nuclear Coulomb fields is used to derive fragmentation cross sections. A simple energy-loss term is applied to estimate the energy downshifts that greatly alter the Coulomb trajectory at low energy. The results, which are far more realistic than prior versions of the code, should provide the data base for future transport calculations. The systematic behavior of charge-removal cross sections compares favorably with results from low-energy experiments.
Document ID
19940007962
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Wilson, John W.
(NASA Langley Research Center Hampton, VA, United States)
Chun, Sang Y.
(Old Dominion Univ. Norfolk, VA., United States)
Badavi, Francis F.
(Christopher Newport Coll. Newport News, VA., United States)
John, Sarah
(Vigyan Research Associates, Inc. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1993
Subject Category
Space Radiation
Report/Patent Number
L-17226
NASA-TP-3352
NAS 1.60:3352
Accession Number
94N12434
Funding Number(s)
PROJECT: RTOP 199-45-16-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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