Y. Murin et al., ON A POSSIBILITY TO DISTINGUISH BETWEEN SEQUENTIAL AND PROMPT MULTIFRAGMENTATION IN EXPERIMENTS, Europhysics letters, 34(5), 1996, pp. 337-342
Predictions on ratios between the yield of light isotopes (Li, Be, B a
nd C) from Sn-112 and Sn-124 nuclei from a microcanonical multifragmen
tation model and a sequential evaporation model are compared at excita
tion 175-800 MeV. Secondary decay does not affect these ratios signifi
cantly, which make them useful to estimate the excitation energy at th
e instant of fragmentation. The excitation energy dependence agrees we
ll except for a local minimum near the onset of multifragmentation pre
dicted only by the microcanonical model due to coupling between exit c
hannels. This offers a way to distinguish between the models by measur
ing the relative yields of fragments from target residues differing si
gnificantly only in their neutron numbers.