The angular dependences of proton photoproduction from the nuclei 12 C, 63 Cu and 208 Pb irradiated by bremsstrahlung γ-quanta with maximum energy 4.5 GeV, both in the cumulative region (i.e. in the kinematical region in which the production of protons in the collision of γ-quanta of the given energy with the quasi-free nuclear nucleon is forbidden) and in the non-cumulative region, are investigated. The experimental data obtained are compared with the results of theoretical calculations of cumulative proton photoproduction according to the following models: the “quasi-two-body” scaling model, the low-nucleon correlation model, the fluctuon model and the cluster model.
Axis error includes +- 7/7 contribution.
NUMERICAL VALUES SUPPLIED BY S. HOMMA.
DATA WERE OBTAINED BY SUBTRACTION METHOD. TO OBTAIN NORMALIIZED INVARIANT CROSS SECTION DATA FROM PR D8, 226 WERE USED.
MISPRINT IN TAB.1 IN YV AT XV=0.763, CORRECTED BY VVE FROM GRAPH.