Latest documents http://publikationen.ub.uni-frankfurt.de/index/index/ Mon, 06 Feb 2006 14:52:28 +0200 Mon, 06 Feb 2006 14:52:28 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2675 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°). R. Madey; W. M. Zhang; B. D. Anderson; A. R. Baldwin; M. Elaasar; B. S. Flanders; D. Keane; W. Pairsuwan; J. Varga; J. W. Watson; G. D. Westfall; C. Hartnack; Horst Stöcker; K. Frankel article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2675 Fri, 02 Jun 2006 14:52:28 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2682 Nuclear transport models including density- and momentum-dependent mean-field effects are compared to intranuclear-cascade models and tested on recent data on inclusive p-like cross sections for 800A-MeV La+La. We find a remarkable agreement between most model calculations but a systematic disagreement with the measured yield at 20°, possibly indicating a need for modification of nuclear transport properties at high densities. Jörg Aichelin; Joseph Cugnon; Z. Fraenkel; K. Frankel; Charles Gale; Miklos Gyulassy; D. Keane; C. M. Ko; J. Randrup; A. Rosenhauer; Horst Stöcker; G. Welke; J. Q. Wu article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/2682 Fri, 02 Jun 2006 14:14:07 +0200