Total Reaction Cross Sections of Several Nuclei for 61-Mev Protons

Predictions of total and total reaction cross sections for nucleon-nucleus scattering up to 300 MeV

“…Again all data are well reproduced by the g-folding calculations. With 27 Al however, three data points between 180 and 300 MeV are in better agreement with the results of t-folding calculations while one data point, at 61 MeV [32], is in disagreement with both calculations.…”

“…The t-folding model overestimates the data by 20-40% within the energy regime below 200 MeV. But some data, notably at 61 MeV [32] and at 77 MeV [33] MeV with 12 C, are in disagreement with both calculated results.…”

“…In all cases, at least two calculations were made. The first of these used the effective interaction defined from the t matrices of the Bonn-B interaction while with the second, that built upon the [19], [22], [23], [24], [25], [26], [27], [28] 12 C [21], [29], [30], [31], [32], [19], [33], [34], [35], [23], [36], [24], [26], [27] [29], [31], [32], [38], [19], [33], [22], [35], [39], [40], [23], [36], [24], [26] 40 Ca [19], [41], [23], [42], [20], [28] 63 Cu [29], [43], [33], [22], [44], [35], …”

Comparison of optical model results from a microscopic Schrödinger approach to nucleon-nucleus elastic scattering with those from a global Dirac phenomenology

“…On the other hand the reaction cross sections determined with both the EDAI and EDAD3 global potentials reflect the data very well falling within the uncertainties at most energies. Some data, notably at 61 MeV [33] and at 77 MeV [35] results. However, they are exceptional points in that they also disagree with empirical values taken at nearby energies.…”

“…Although experimental data exist to much lower energies, any effective mean field prescription for the optical potential at such low energies is not appropriate. However, in a recent paper [52], a multi-channel algebraic scattering (MCAS) theory has been developed with which the low [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43] 16 O [44], [40], [45] 40 Ca [34], [46], [38], [47], [45], [43] 90 Zr [48], [38], [49], [39] 208 Pb [30], [32], [33], [35], [46], [50], [38], [39], [40], [51], [45], [43] -0 energy range should be covered. This MCAS approach lends itself to specification of the dynamic polarization potential resulting from a summation over all diverse channel functions allowed in that theory.…”