Source size scaling of fragment production in projectile breakup

Details Source size scaling of fragment production in projectile breakup Source size scaling of fragment production in projectile breakup

1996-07-15

arxiv.org/abs/nucl-ex/9607009v1

Phys.Rev.C54:973-976,1996

Physics

Nuclear Physics

Nuclear Experiment

13 pages LaTeX file, including 3 postscript figures (in .tar.gz fornmat), accepted in Phys. Rev. C . Also available at http:

Scientific paper

10.1103/PhysRevC.54.R973

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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