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. Dore; A. Galindo-Uribarri; D. Guinet; E. Hagberg; D. Horn; R. Laforest; Y. Larochelle; P. Lautesse; M. Samri; R. Roy; C. St-Pierre

doi:10.1103/physrevc.54.r973

arXiv · nucl-ex/9607009

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. Dore·A. Galindo-Uribarri·D. Guinet·E. Hagberg·D. Horn·R. Laforest·Y. Larochelle·P. Lautesse·M. Samri·R. Roy·C. St-Pierre

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Abstract

Fragment production has been studied as a function of the source mass and excitation energy in peripheral collisions of $^{35}$Cl+$^{197}$Au at 43 MeV/nucleon and $^{70}$Ge+$^{nat}$Ti 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 $A_{source} \sim$ 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.

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L. Beaulieu, D. R. Bowman, D. Fox, S. Das Gupta, J. Pan, G. C. Ball, B. Djerroud, D. Dore, A. Galindo-Uribarri, D. Guinet, E. Hagberg, D. Horn, R. Laforest, Y. Larochelle, P. Lautesse, M. Samri, R. Roy, C. St-Pierre. 1996-07-15. Source size scaling of fragment production in projectile breakup. https://doi.org/10.1103/physrevc.54.r973

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