Fragment multiplicity dependent charge distributions in heavy ion collisions
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- National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
- Institute for Nuclear Research, 117312 Moscow (Russia)
- Laboratoire National SATURNE, CEN Saclay, 91191 Gif-sur-Yvette (France)
- Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
- Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt 11 (Germany)
- Department of Chemistry and IUCF, Indiana University, Bloomington, Indiana 47405 (United States)
- Instituto de Fisica, Universidade de Sa Paulo, CEP 01498, Sa Paulo (Brazil)
The dependence of intermediate-mass-fragment (IMF) element distributions on the multiplicity, N{sub IMF}, of detected fragments has been measured for {sup 84}Kr+{sup 197}Au collisions at E/A=35, 55, 70, 100, 200, and 400 MeV. The observed dependence can be parametrized as P(N{sub IMF}{vert_bar}Z){proportional_to}P(Z)exp({minus}c{center_dot}N{sub IMF}{center_dot}Z), where c is a beam-energy and excitation-energy dependent parameter. Previous work indicated this parameter is zero in the liquid-gas coexistence region and positive in the gaseous phase. In contrast, we observe both negative and positive values for c, revealing the meaning of this parameter to be less straightforward than previously assumed. The magnitude of c appears nonetheless to provide a nontrivial test of multifragmentation models. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Washington University
- DOE Contract Number:
- FG02-87ER40316
- OSTI ID:
- 488770
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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