Global test of modified precompound decay models

A single parameter set was adopted for the hybrid and geometry dependent hybrid models. The nuclear density profile was modified for consistency with results of the Myers nuclear droplet model. Optical model parameters were modified to give better global results for inverse reaction cross sections in the precompound energy range up to 90 MeV. Two types of multiple precompound decay processes are defined, and the more important of the two is incorporated into the precompound decay formalism. This results in two to five orders of magnitude improvement in predicting $^{202}\mathrm{Hg}$(p,2p) and $^{202}\mathrm{Hg}$(p,2pn) product yields for proton energies up to 86 MeV. The global parameter set and formulation of this work is compared with (n, $x\mathrm{n}$) and (n,p) spectra for 14 MeV incident neutrons, for (p,n) spectra with 18-90 MeV protons, and with (p,p\ensuremath{'}) spectra for 39-90 MeV protons. The geometry dependent hybrid model gives the better overall agreement, in most cases within the 20-30% limit of significance attached to the model. Some discussion is given of methods by which the calculations might be further improved.NUCLEAR REACTIONS Hybrid, geometry dependent hybrid precompound decay models, improve global parameter set, implement multiple precompound decay. Test new formulation vs spectra from reactions induced by 14 MeV neutrons to 90 MeV protons.