Multifragmentation: Surface instabilities or statistical decay?

Abstract

Boltzmann-Nordheim-Vlasov calculations show multifragmentation that seems to originate from surface instabilities. These instabilities are traced to a sheet instability caused by the proximity interaction. Experimental data, on the other hand, suggest that multifragmentation may be dominated by phase space.

Breakup of highly excited 35Cl projectiles on a gold target at 30 A MeV: An exclusive analysis

“…(3) gives a (3) P,. (E) °<p(E-B.,) ** for each channel should be proportionnal to the level density p Following Moretto and co-workers [38] , the decay probability Pn seems to provide confirmation of such a hierarchy.…”

“…This progression is not simply due to the total excitation-energy distribution, displaying an increase in excitation compared to the differences between the average "barriers", Bn , of these among the decay configurations for a given multiplicity are small have proposed that the differences of the barriers at the saddle point multifragmentation (which could be sequential or simultaneous). They the concept of the saddle-point barrier in describing statistical As has been done for binary decay, Moretto et al [38] have used 4.3. Dependence of the cross section on the excitation energy constant value of required average excitation energy.…”