Abstract
A multidetector setup with large solid angle coverage has been used to measure the particle and fragment emission associated with the production of intermediate mass fragments in reactions of $^{12}\mathrm{C}$, $^{18}\mathrm{O}$, $^{20}\mathrm{Ne}$, and $^{40}\mathrm{Ar}$ on $^{\mathrm{nat}}\mathrm{Ag}$ and $^{197}\mathrm{Au}$ at bombarding energies $30 \mathrm{MeV}\ensuremath{\le}\frac{E}{A}\ensuremath{\le}84 \mathrm{MeV}$. It is found that the cross sections, the element distributions, and the multiplicites of intermediate mass fragments are strongly correlated with the excitation energy ${E}_{x}$ deposited in the composite system and that multifragment emission sets in at ${E}_{x}\ensuremath{\cong}300$ MeV.
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