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The partial beam lifetime at RHIC due to Coulomb dissociation of the nucleus [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
9 pages : digital, PDF file
Additional Creators:
Brookhaven National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
During beam crossing at RHIC, the Lorentz contracted Coulomb interaction between the heavy ions will excite internal modes of the nucleus. The subsequent decay of these modes is predominately via single or multiple nucleon emission. Changing the atomic mass Of the beam ion will eventually cause beam intensity loss at RHIC for the radius of the ion orbit is sensitive to changes of the ratio Z/A. While calculations for this beam loss mechanism have been made, it is now clear that these earlier theoretical studies underestimated the Coulomb dissociation loss rate for they appear to have included only a limited range of internal nuclear excitation energy. In this report we reexamine the question of Coulomb dissociation cross sections at RHIC by including internal excitation energies up to thousands of GeV. In addition, we utilize experimental photonuclear absorption cross sections when evaluating the dissociation cross section. Also, internal excitation of a nucleus in one beam wig result in both energy loss and transverse momentum change of an ion in the colliding beam. These recoil effects will be examined in detail to determine if there is an additional loss rate for ions out of the rf bucket or a non-negligible change in the ion`s betatron momentum.
Report Numbers:
E 1.99:bnl--47806
E 1.99: ad/rhic--110
ad/rhic--110
bnl--47806
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
07/01/1992.
"bnl--47806"
" ad/rhic--110"
"DE92019256"
Weneser, J.; Rhoades-Brown, M.J.
Type of Report and Period Covered Note:
Topical; 07/01/1992 - 07/01/1992
Funding Information:
AC02-76CH00016
View MARC record | catkey: 14694361