Evaluation of Total Nuclear Photoabsorption Cross-Sections by the Modified Quasi-Deuteron Model

Levinger's modified quasi-deuteron model has been used to analyse available experimental data on total nuclear photoabsorption cross-section in the mass range 7 ⩽ A ⩽ 238 and in the energy range (35 ÷ 140) MeV. It is shown that the measured cross-sections are successfully reproduced by the formula σT(Eγ) = LNZ/AσD(Eγ) exp [- D/E] with L = 6.1 ± 2.2 and D = 0.72A0.81.