Multifragment emission in reactions induced by 0.90 and 3.6 GeV ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ ions on ${}_{}{}^{\mathrm{nat}}{}_{}{}^{}\mathrm{Ag}$

Multifragment events for intermediate-mass fragments (3≤Z≤12) with multiplicity up to four have been observed in the reaction of 0.90 and 3.6 GeV ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ ions with ${}_{}{}^{\mathrm{natAg}}{}_{}{}^{}$ nuclei. Fragment energy spectra and angular distributions are found to be dependent on event multiplicity. The data suggest significant modification of the Coulomb field of the emitting source.