Moving-source and caloric-curve analyses of reactions induced by 1.84.8GeV He3 beams on Agnat and Au197 nuclei

D. S. Bracken, K. Kwiatkowski, E. Renshaw Foxford, K. B. Morley, V. E. Viola, N. R. Yoder, J. Brzychczyk, E. C. Pollacco, R. Legrain, C. Volant, R. G. Korteling, and H. Breuer
Phys. Rev. C 69, 034612 – Published 24 March 2004

Abstract

Multifragment breakup of Agnat and Au197 nuclei bombarded by 1.84.8GeV He3 ions has been studied with the Indiana Silicon Sphere 4π detector array. To investigate the properties of the emitting source as a function of excitation energy, a two-component moving-source analysis has been performed on the intermediate-mass-fragment spectra, gating on excitation energy. The results provide evidence for nuclear expansion∕dilution to a value of ρρ013 prior to breakup. For the most violent events, relatively low source velocities of vc~0.01 and slope temperatures of T15MeV are obtained for the dominant thermal-like source. The dependence of isotope ratios on deposition energy and ejectile kinetic energy is examined for H and He isotopes, and the caloric curves for the 4.8GeV data are presented.

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  • Received 28 October 2003

DOI:https://doi.org/10.1103/PhysRevC.69.034612

©2004 American Physical Society

Authors & Affiliations

D. S. Bracken*, K. Kwiatkowski*, E. Renshaw Foxford, K. B. Morley*, V. E. Viola, and N. R. Yoder

  • Indiana University Chemistry Department and IUCF, Bloomington, Indiana 47405, USA

J. Brzychczyk

  • Institute of Physics, Jagellonian University, 30-059 Krakow, Poland

E. C. Pollacco, R. Legrain, and C. Volant

  • DAPNIA∕SPhN, CEA∕Saclay, F-91191 Gif-sur-Yvette Cedex, France

R. G. Korteling

  • Department of Chemistry, Simon Fraser University, Burnaby, Canada V5A 1S6

H. Breuer

  • Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • *Present address: Los Alamos National Laboratory, Los Alamos, NM 87545.
  • Present address: Microsoft Corp., Redmond, WA.
  • Deceased.

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Vol. 69, Iss. 3 — March 2004

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