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Title: Isotropic emission components in splintering central collisions: (17-115)A MeV {sup 40}Ar + Cu, Ag, Au

Abstract

The ensemble of charged isotropically emitted ejectiles is studied for central collisions of (17-115)A MeV {sup 40}Ar + Cu, Ag, Au. Measurements of average multiplicities, spectral slopes, and masses of the heaviest fragments are compared to statistical models for multifragmentation or sequential evaporation. The multifragmentation models predict much more complete nuclear disassembly than is observed. The evaporation model reproduces the data much more closely except for the spectra of Z=1 ejectiles. The kinetic energies of Z=1 and 2 ejectiles are much less than found for 1A GeV {sup 197}Au+{sup 12}C for similar energy depositions. Entrance channel dynamics seem to affect the isotropic emission ensembles, often taken to define an equilibrated emission source. (c) 2000 The American Physical Society.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [3];  [3];  [1];  [4];  [5]
  1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)
  2. (France)
  3. Departments of Chemistry and Physics, Hope College, Holland, Michigan 49423 (United States)
  4. Nuclear Physics Laboratory, University of Colorado, Boulder, Colorado 80309-0446 (United States)
  5. National Superconducting Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States) (and others)
Publication Date:
OSTI Identifier:
20216915
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 61; Journal Issue: 6; Other Information: PBD: Jun 2000; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ARGON 40 REACTIONS; HEAVY ION REACTIONS; COPPER; SILVER; GOLD; NUCLEAR FRAGMENTATION; EVAPORATION MODEL; STATISTICAL MODELS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Sun, Rulin, Colin, E., Institut de Physique Nucleaire de Lyon, Institut National de Physique Nucleaire et de Physique des Particules-Centre National de la Recherche Scientifique/UniversiteClaude Bernard, 43, Blvd. du 11 Novembre 1918, F-69622 Villeurbanne, Cedex,, Ajitanand, N. N., Alexander, John M., Barton, M. A., DeYoung, P. A., Drake, K. L., Elmaani, A., Gelderloos, C. J., and Gualtieri, E. E. Isotropic emission components in splintering central collisions: (17-115)A MeV {sup 40}Ar + Cu, Ag, Au. United States: N. p., 2000. Web. doi:10.1103/PhysRevC.61.061601.
Sun, Rulin, Colin, E., Institut de Physique Nucleaire de Lyon, Institut National de Physique Nucleaire et de Physique des Particules-Centre National de la Recherche Scientifique/UniversiteClaude Bernard, 43, Blvd. du 11 Novembre 1918, F-69622 Villeurbanne, Cedex,, Ajitanand, N. N., Alexander, John M., Barton, M. A., DeYoung, P. A., Drake, K. L., Elmaani, A., Gelderloos, C. J., & Gualtieri, E. E. Isotropic emission components in splintering central collisions: (17-115)A MeV {sup 40}Ar + Cu, Ag, Au. United States. doi:10.1103/PhysRevC.61.061601.
Sun, Rulin, Colin, E., Institut de Physique Nucleaire de Lyon, Institut National de Physique Nucleaire et de Physique des Particules-Centre National de la Recherche Scientifique/UniversiteClaude Bernard, 43, Blvd. du 11 Novembre 1918, F-69622 Villeurbanne, Cedex,, Ajitanand, N. N., Alexander, John M., Barton, M. A., DeYoung, P. A., Drake, K. L., Elmaani, A., Gelderloos, C. J., and Gualtieri, E. E. Thu . "Isotropic emission components in splintering central collisions: (17-115)A MeV {sup 40}Ar + Cu, Ag, Au". United States. doi:10.1103/PhysRevC.61.061601.
@article{osti_20216915,
title = {Isotropic emission components in splintering central collisions: (17-115)A MeV {sup 40}Ar + Cu, Ag, Au},
author = {Sun, Rulin and Colin, E. and Institut de Physique Nucleaire de Lyon, Institut National de Physique Nucleaire et de Physique des Particules-Centre National de la Recherche Scientifique/UniversiteClaude Bernard, 43, Blvd. du 11 Novembre 1918, F-69622 Villeurbanne, Cedex, and Ajitanand, N. N. and Alexander, John M. and Barton, M. A. and DeYoung, P. A. and Drake, K. L. and Elmaani, A. and Gelderloos, C. J. and Gualtieri, E. E.},
abstractNote = {The ensemble of charged isotropically emitted ejectiles is studied for central collisions of (17-115)A MeV {sup 40}Ar + Cu, Ag, Au. Measurements of average multiplicities, spectral slopes, and masses of the heaviest fragments are compared to statistical models for multifragmentation or sequential evaporation. The multifragmentation models predict much more complete nuclear disassembly than is observed. The evaporation model reproduces the data much more closely except for the spectra of Z=1 ejectiles. The kinetic energies of Z=1 and 2 ejectiles are much less than found for 1A GeV {sup 197}Au+{sup 12}C for similar energy depositions. Entrance channel dynamics seem to affect the isotropic emission ensembles, often taken to define an equilibrated emission source. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevC.61.061601},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 6,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}