The dependence on energy and mass number of the α-particle optical potential

Data for elastic scattering of α-particles by 40sup(,)42sup(,)44sup(,)48Ca, 50Ti, 52Cr and 90Zr at 104 MeV, by 40Ca, 46sup(,)48sup(,)50Ti, 58Ni, 90Zr and 208Pb at 140 MeV and by 58sup(,)60sup(,)62sup(,)64Ni at 173 MeV are analysed using a Fourier-Bessel description of the optical potential. All data extend to large angles, thus allowing unique determination of volume integrals and rms radii of the potentials. The variations with mass number and energy of these quantities are investigated and conclusions are drawn about studies of nuclear radii with the help of optical potentials. (orig.)