Weaknesses in Angeli and Csikai’s interpretation of their empirical formula for the neutron total cross section (σ_T) are pointed out. Using the Fourier-Bessel re-presentation of the scattering amplitude a semi-empirical formula forσ_T is obtained which has greater applicability and also explains the success of the empirical formula for mass numberA ⩾ 40 in terms of the established trends in neutron optical potential parameters.

The alpha-particle model has been applied to calculate the elastic and the 2⁺ inelastic angular distribution of 1 GeV protons on¹²C within the framework of Glauber multiple scattering theory. The results are compared with the recent experimental data and with some previous calculations. The model gives a fairly good account of the inelastic data and its predictions for the elastic scattering are essentially the same as those of the shell model.

The (α–d) cluster model with parameters determined from electron scattering and pion photoproduction processes is used to calculate the muon capture rate in⁶Li. The result is found to be better than the results calculated in other models and is in agreement with the experimental data.