Source size scaling of fragment production in projectile breakup

L. Beaulieu, D. R. Bowman, D. Fox, S. Das Gupta, J. Pan, G. C. Ball, B. Djerroud, D. Doré, A. Galindo-Uribarri, D. Guinet, E. Hagberg, D. Horn, R. Laforest, Y. Larochelle, P. Lautesse, M. Samri, R. Roy, C. St-Pierre

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Fragment production has been studied as a function of the source mass and excitation energy in peripheral collisions of 35Cl+197Au at 43 MeV/nucleon and 70Ge+natTi at 35 MeV/nucleon. The results are compared to the Au+Au data at 600 MeV/nucleon obtained by the ALADIN Collaboration. A mass scaling, by 4source∼ 35 to 190, strongly correlated to excitation energy per nucleon, is presented, suggesting a thermal fragment production mechanism. Comparisons to a standard sequential decay model and the lattice-gas model are made. Fragment emission from a hot, rotating source is unable to reproduce the experimental source size scaling.

Original languageEnglish
Pages (from-to)R973-R976
JournalPhysical Review C - Nuclear Physics
Volume54
Issue number3
DOIs
StatePublished - Sep 1996
Externally publishedYes

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