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Phys. Rev. Lett. 79, 817 - 820 (1997)

Formation of Hot Nuclei with GeV p and π- Beams

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W.-c. Hsi, K. Kwiatkowski, G. Wang, D. S. Bracken, E. Cornell, D. S. Ginger, V. E. Viola, and N. R. Yoder
Department of Chemistry and IUCF, Indiana University, Bloomington, Indiana 47405

R. G. Korteling
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6

F. Gimeno-Nogures, E. Ramakrishnan, D. Rowland, and S. J. Yennello
Department of Chemistry and Cyclotron Institute, Texas A&M University, College Station, Texas 77843

M. J. Huang, W. G. Lynch, M. B. Tsang, and H. Xi
Department of Physics and NSCL, Michigan State University, East Lansing, Michigan 48824

Y. Y. Chu, S. Gushue, and L. P. Remsberg
Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973

K. B. Morley
Los Alamos National Laboratory, Los Alamos, New Mexico 87545

H. Breuer
Department of Physics, University of Maryland, College Park, Maryland 20742

Received 17 March 1997

4π studies of multiple charged-particle emission in GeV π-- and proton-induced reactions on a Au target have been performed with the ISiS detector array. Multiplicity, charge, and angular distributions yield nearly identical results for both p and π- beams, suggesting an independence of hadron type in initiating the fast cascade and subsequent energy deposition in the struck nucleus. The excitation functions show little sensitivity to beam momentum, consistent with a saturation in deposition energy and the concept of limiting fragmentation. However, the intermediate mass fragment multiplicities and fragment charge distributions depend strongly on collision violence.


©1997 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.79.817
DOI: 10.1103/PhysRevLett.79.817
PACS: 25.40.Ve, 21.65.+f, 25.70.Pq, 25.80.Hp

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