Abstract
Fissionlike (FL) phenomena for systems around mass 100 have been shown previously interpretable in terms of dynamical fission. This appears to be dependent on the entrance channel mass asymmetry. We have studied the fissionlike exit channel in the84Kr+24Mg reaction atE(Kr)=5.8 MeV/u. This energy is just above the threshold of fission, so that a clear separation between the Deep Inelastic Component (DIG) and the FL one can be achieved. The bombarding energy corresponds to the same excitation energy in the composite system108Cd (E *=101 MeV) as in the32S (158 MeV) on76Ge reaction we studied earlier and for which fusion-evaporation along with fission-like contributions were measured. The width of the FL distribution confirms the previously observed dependence with the mass asymmetry in the entrance channel which is consistent with the extra push model.
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On leave from Department of Modern Physics, Lanzhou, China
We want to thank the IPN-Orsay for its kind hospitality and especially the operating crew of the ALICE accelerator for its assistance in the delicate working conditions to deliver a 490 MeV top energy Kr beam of good intensity.
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Heusch, B., Coffin, J.P., Engelstein, P. et al. Fissionlike exit channel in the 5.8 MeV/u84Kr on24Mg reaction. Z Physik A 312, 109–111 (1983). https://doi.org/10.1007/BF01411667
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DOI: https://doi.org/10.1007/BF01411667