Phys. Rev. Lett. 60, 1630 - 1633 (1988)Hard photons in heavy-ion collisions: Direct or statistical? |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
N. Herrmann, R. Bock, H. Emling, R. Freifelder, A. Gobbi, E. Grosse, K. D. Hildenbrand, R. Kulessa, T. Matulewicz, F. Rami, R. S. Simon, H. Stelzer, and J. Wessels
Gesellschaft für Schwerionenforschung, Darmstadt, West Germany
P. R. Maurenzig, A. Olmi, and A. A. Stefanini
Università di Firence and Istituto Nazionale di Fisica Nucleare, Florence, Italy
W. Kühn, V. Metag, and R. Novotny
II. Physikalisches Institut, Universität Giessen, Giessen, West Germany
M. Gnirs and D. Pelte
Physikalisches Institut, Universität Heidelberg, Heidelberg, West Germany
P. Braun-Munzinger
Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
L. G. Moretto
Lawrence Berkeley Laboratory, Berkeley, California 94720
Received 18 September 1987
Photons with energies from 2 to 60 MeV have been measured in coincidence with binary fragments in the reaction 92Mo+92Mo at an incident energy of 19.5A MeV. The rapid change of the γ-ray spectrum and multiplicity with the fragment total kinetic energy in the exit channel indicates that the γ rays are emitted statistically by the highly excited fragments. Temperatures as high as 6 MeV are inferred.
©1988 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v60/p1630
DOI: 10.1103/PhysRevLett.60.1630
PACS: 25.70.Np, 24.30.Cz
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