O. Schapiro et Dhe. Gross, IMF IMF CORRELATIONS INFORMATION ON SPACE-TIME STRUCTURE OF THE FRAGMENTING SOURCE, Nuclear physics. A, 573(1), 1994, pp. 143-153
Information on the decaying source contained in the IMF-IMF correlatio
n function is analyzed within the Berlin-multifragmentation model. The
rise seen at low excitation energies (E) for an angle-integrated cor
relation function signalizes a very asymmetric hot fission. It disappe
ars within the region of multifragmentation when the largest fragment
is also an IMF. The simulations of the experimental data on correlatio
n functions for the reaction Xe-128 + (nat)Cu are presented. Most expe
rimental correlation functions per se do not give useful information,
i.e. different choices of the source parameters give good fits. In the
present paper we indicate what kind of experimental information allow
s conclusive tests of the physical scenario. The shown simulations pre
dict a larger freeze-out radius for an emitting source at smaller exci
tation energies. A possible interpretation may be that multifragmentat
ion is simultaneous on the time scale tau(c) almost-equal-to 10(-21) s
of the Coulomb correlation but still sequential within a finer time-r
esolution. I.e. the time delay tau(em). between the deliberation of tw
o fragments at freeze-out is tau(em) < tau(c) and shrinking with risin
g excitation.