Formation of residual nuclei with medium mass number in the reaction of protons with separated tin isotopes

The mechanism of formation of residual nuclei in the mass region 42 less th an or equal to A less than or equal to 81 in the reactions of protons with separated tin isotopes at three protons energies 0.66, 1.0 and 8.1 GeV was investigated. The absolute cross-sections of the residual nuclei were compa red with the theoretical ones calculated by the standard cascade-evaporatio n and the intranuclear cascad plus statistical multifragmentation models (I NC + SMM), It was shown that at E-P = 8.1 GeV these nuclei may arise both f rom disintegration of the nucleus and as partners of several fragments. (C) 2000 Elsevier Science B.V. All rights reserved.