The dependence of the intermediate-mass-fragment (IMF) charge distribution on the multiplicity $N_{\mathrm{IMF}}$ of detected fragments has been investigated in projectile fragmentation ALADIN data from $E/A$ = 600, 800, and 1000 MeV ${}^{197}$Au + ${}^{197}$Au collisions. The observed dependence can be parametrized as $P_{N_{\mathrm{IMF}}}\mathrm{}\left(Z\right)\mathrm{}\propto \tilde{P}\mathrm{}\left(Z\right)\mathrm{}\exp \left(-{\mathrm{cN}}_{\mathrm{IMF}}Z\right)$ where $c$ is an excitation-energy-dependent parameter whose value evolves from near zero to a positive quantity as a function of $Z_{\mathrm{bound}}.$

• Received 23 May 1997

DOI:https://doi.org/10.1103/PhysRevC.56.1651