Inclusive neutron cross-sections at forward angles from Nb Nb and Au Au collisions at 800-MeV/nucleon

  • Inclusive neutron spectra were measured at 0°, 4°, 8°, 15°, 30°, and 42° from Nb-Nb and Au-Au collisions at 800 MeV/nucleon. A peak that originates from neutron evaporation from the projectile appears in the spectra at angles out to 8°. The shapes and magnitudes of the spectra are compared with those calculated from models of nucleus-nucleus collisions. The differential cross sections for Au-Au collisions are about four times those for Nb-Nb collisions. The predictions of the Vlasov-Uehling-Uhlenbeck (VUU) and QMD theories agree with the angular distributions of the differential cross sections except at small angles; the VUU prediction overestimates the angular distributions from a few degrees to about 20°, whereas the QMD prediction underestimates the angular distributions below 8°. The Firestreak model overestimates the angular distribution for Nb-Nb collisions and underestimates it for Au-Au collisions. Also, the VUU and QMD models agree with the measured double-differential cross sections in more angular and energy regions than the Firestreak and intranuclear cascade models; however, none of the models can account for the peaks at small angles (θ≤15°).

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Author:Richard Madey, Wei-Ming Zhang, Bryon D. Anderson, Alan Richard Baldwin, Mostafa Elaasar, Bruce S. Flanders, Declan KeaneORCiD, Weerapong Pairsuwan, J. Varga, John W. Watson, Gary D. WestfallGND, Christoph HartnackORCiD, Horst StöckerORCiDGND, Kenneth A. Frankel
Parent Title (German):Physical review C
Document Type:Article
Date of Publication (online):2006/06/02
Year of first Publication:1990
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/06/02
Page Number:9
First Page:1068
Last Page:1076
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht