Impact Parameter Dependence of Light Charged Particle Production in 25 A MeV 16O on Tb, Ta and 35 A MeV 14N on Sm and Ta

D. Prindle, Nuclear Physics Laboratory, University of Washington
A. Elmaani, Nuclear Physics Laboratory, University of Washington
C. Hyde-Wright, Nuclear Physics Laboratory, University of Washington
W. Jiang, Nuclear Physics Laboratory, University of Washington
A. A. Sonzogni, Nuclear Physics Laboratory, University of Washington
R. Vandenbosch, Nuclear Physics Laboratory, University of Washington
D. Bowman, National Superconducting Cyclotron Laboratory, Michigan State University
G. Cron, National Superconducting Cyclotron Laboratory, Michigan State University
P. Danielewicz, National Superconducting Cyclotron Laboratory, Michigan State University
J. Dinius, National Superconducting Cyclotron Laboratory, Michigan State University
W. Hsi, National Superconducting Cyclotron Laboratory, Michigan State University
W. G. Lynch, National Superconducting Cyclotron Laboratory, Michigan State University
C. Montoya, National Superconducting Cyclotron Laboratory, Michigan State University
Graham F. Peaslee, National Superconducting Cyclotron Laboratory, Michigan State UniversityFollow
C. Schwarz, National Superconducting Cyclotron Laboratory, Michigan State University
M. B. Tsang, National Superconducting Cyclotron Laboratory, Michigan State University
C. Williams, National Superconducting Cyclotron Laboratory, Michigan State University
R. T. de Souza, Indiana University Cyclotron Facility, Indiana University
D. Fox, Indiana University Cyclotron Facility, Indiana University
T. Moore, Indiana University Cyclotron Facility, Indiana University

Document Type

Article

Publication Date

3-1-1998

Publication Source

Physical Review C

Volume Number

57

Issue Number

3

First Page

1305

Last Page

1318

Publisher

American Physical Society

Abstract

The impact parameter dependence of light charged particle (p,d,t,α) emission has been studied using an impact parameter selection based on coincident detection of residues or fission fragments. The energy spectra at twelve angles between 20° and 150° have been fit by a multiple moving source parametrization. The angle and energy integrated preequilibrium proton multiplicities decrease with increasing impact parameter in qualitative agreement with a Fermi jet calculation. The preequilibrium d/p and t/p multiplicities increase slowly with increasing impact parameter and are nearly identical at the two bombarding energies. The preequilibrium α/p ratio shows a less consistent dependency on impact parameter but decreases significantly with increasing bombardment energy. A calculation of thed/p and t/p multiplicity ratios with a transport model incorporating complex particle emission is quite successful in reproducing the absolute magnitude, impact parameter dependence, and bombarding energy dependence of the experimental total multiplicities.

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