Global alpha-nucleus optical potential

Complementary optical-potential analysis of -particle elastic scattering and induced reactions at low energies

“…11). The same has been proved [13] to be true also for an enlarged systematics [78,79,80,81,82,85,86] discussed recently [23], and several data sets [83,87] lastly taken into account. The related incident-energy range can hardly explain the difference with respect to the same comparison just above A=60 (Fig.…”

“…The mass-dependences corresponding to nuclei with a nuclear asymmetry (N-Z)/A value of 0.1 are shown, while the complete formulas of the energies E 1 , E 2 , E 3 are given in Table 3. Table 1) angular distributions of the elastic scattering of α-particles at 25 MeV on 51 V, 53 Cr, 56,58 Fe, 59 Co, 63 Cu, 70,74,76 Ge, 76,78,80 Se, 94 Mo, 107 Ag and 112,124 Sn, divided by the Rutherford cross section, with OMP calculations by using either the present local parameter sets of Table 2 (solid curves), the regional parameter set in Table 3 (dash-dotted curves), or the global OMP parameter set of Kumar et al [23] (dotted curves). Fig.…”

“…1-7, in order to emphasize its usefulness and related deviations from the local analysis results. Moreover, the predictions of the most recent global parameter set of Kumar et al [23] are included, while those provided by McFadden and Satchler with a fourparameter global potential [16] have already been presented elsewhere [13]. A comparison of semi-microscopically calculated angular distributions and ROP results is shown in Fig.…”

“…A global α-nucleus optical potential has been proposed by the BARC group [23] for A ∼12-209 and energies from the Coulomb barrier up to about 140 MeV, based on the systematics of the real and imaginary potential volume integrals established by Atzrott et al [24] by using a DFM real part and the description in a unified way of elastic scattering data for A=40-208 and energies from 30 to 150 MeV, as well as bound state properties. The BARC global potential has been found to describe well the high energy elastic-scattering data, while at lower energies the calculations and the data differ considerably and further investigation has been found necessary [23].…”

“…The BARC global potential has been found to describe well the high energy elastic-scattering data, while at lower energies the calculations and the data differ considerably and further investigation has been found necessary [23]. Next, an acceptable quality of fits has been considered for the calculation of nuclear reactions with α-particles especially in the entrance channel.…”