corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 83 » Issue 20
< Previous Article | Next Article >

Phys. Rev. Lett. 83, 4033–4036 (1999)

Heating 197Au Nuclei with 8GeV/c Antiproton and π- Beams

Download: PDF (228 kB) Buy this article Export: BibTeX or EndNote (RIS)

T. Lefort1, K. Kwiatkowski1,*, W.-c. Hsi1, L. Pienkowski2, L. Beaulieu1, B. Back3, H. Breuer4, S. Gushue5, R. G. Korteling6, R. Laforest7, E. Martin7, E. Ramakrishnan7, L. P. Remsberg5, D. Rowland7, A. Ruangma7, V. E. Viola1, E. Winchester7, and S. J. Yennello7
1Department of Chemistry and IUCF, Indiana University, Bloomington, Indiana 47405
2Heavy Ion Laboratory, Warsaw University, 02 097 Warsaw, Poland
3Physics Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439
4Department of Physics, University of Maryland, College Park, Maryland 20742
5Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973
6Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
7Department of Chemistry and Cyclotron Laboratory, Texas A&M University, College Station, Texas 77843

Received 3 March 1999; published in the issue dated 15 November 1999

Comparison of the heating effect produced by 8 GeV/c π- and antiproton beams incident on 197Au nuclei has been conducted with the Indiana silicon sphere 4π detector array. Event reconstruction indicates formation of thermal-like heavy residues with excitation energies up to 1.7 GeV. Enhanced energy deposition is observed for antiprotons relative to negative pions. For events with excitation energies that exceed 1000 MeV, there is a 50% increase in cross section for the antiproton beam relative to the π- beam. The predominant decay mode at these high excitation energies is multifragmentation in which three or more Z≥3 fragments are emitted.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4033
DOI:
10.1103/PhysRevLett.83.4033
PACS:
25.70.Pq, 25.43.+t, 25.80.Hp

*Present address: Los Alamos National Laboratory, Los Alamos, NM 87545.

 
< Previous Article | Next Article >