Proton Production Cross Sections for Reactions Induced by 300- and 392-MeV Protons

Multistep direct processes in proton production reactions were investigated with proton beam of 300- and 392-MeV bombarding targets nuclei. The targets nuclei are 181Ta, 197Au, and 209Bi for 392 MeV and 197Au for 300 MeV protons. Energy spectra were measured at several laboratory angles from 20 deg to 105 deg and compared with two theoretical models, the quantum molecular dynamics and the intranuclear cascade model. At intermediate energy, the double differential cross section is sensitive to ground state in codes. We found that a more realistic ground state led better accounting of measured data.