Light charged particle emission in the matched reactions 280 MeV 40Ar+27Al and 670 MeV 55Mn+12C: Inclusive studies

Craig M. Brown, Zoran Milosevich, Morton Kaplan, Emanuele Vardaci, Paul DeYoung, James P. Whitfield, Donald Peterson, Christopher Dykstra, Paul J. Karol, and Margaret A. McMahan
Phys. Rev. C 60, 064612 – Published 15 November 1999
PDFExport Citation

Abstract

In order to test the statistical model’s ability to predict the behavior of relatively light mass systems (A67) with large angular momenta, two matched heavy ion nuclear reactions were used to produce67Ga* composite nuclei at an excitation energy of 127 MeV. Light charged particles (protons, deuterons, tritons, and α particles) were used as probes to characterize the composite systems and track the deexcitation processes. From these measurements, energy spectra, cross sections, angular distributions, anisotropy ratios, and particle multiplicities were deduced. Measuring many degrees of freedom provides a stringent test for the statistical models. What is found is that models which did well in predicting the behavior of heavy composite systems (A150), are unable to simultaneously reproduce energy spectra, angular distributions, and particle multiplicities for the lighter systems (A67), where angular momentum plays a dominant role. This implies that more rigorous models and/or additional physics are needed to understand the behavior of the hot, high-spin nuclear matter in this mass region.

  • Received 21 June 1999

DOI:https://doi.org/10.1103/PhysRevC.60.064612

©1999 American Physical Society

Authors & Affiliations

Craig M. Brown1,*, Zoran Milosevich1, Morton Kaplan1, Emanuele Vardaci1,†, Paul DeYoung2, James P. Whitfield1, Donald Peterson2, Christopher Dykstra2, Paul J. Karol1, and Margaret A. McMahan3

  • 1Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
  • 2Department of Physics, Hope College, Holland, Michigan 49423
  • 3Lawrence Berkeley National Laboratory, Berkeley, California 94720

  • *Present address: Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, CA 94551.
  • Present address: Dipartimento di Scienze Fisiche, Universita’ di Napoli Federico II, I-80126 Naples, Italy.

References (Subscription Required)

Click to Expand
Issue

Vol. 60, Iss. 6 — December 1999

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×