Charged-particle emission in reactions of 90Zr with 10--86-MeV protons

Excitation functions for 12 nuclear reactions of type 90Zr[(p,(2--4) p, (1--6) n] have been measured for incident proton energies from 10--86 MeV. These complex excitation functions have been decomposed to yield a component due to emission of one or two α particles, and a component due to the emission of individual nucleons. Combining the α particle portions of the decomposed excitation functions, the excitation energy spectra for those events associated with α particle emission have been derived. Having estimated the excitation functions for a few missing reactions, the total probability of emission of seven combinations of charged particles as a function of incident proton energy has been calculated. The implications of the results on the preequilibrium model of nuclear reactions are discussed