Angular distributions of protons scattered byAr40nuclei with excitation of the2+(1.46 MeV) and

Abstract

Elastic and inelastic scattering of unpolarized and polarized protons by 40 Ar nuclei for incident energies between 20 and 50 MeV has been studied by reanalyzing experimental scattering spectra for the 2 + (1.46 MeV) and 3 − (3.68 MeV) levels in the angular range 30 • -160 • for incident protons of energies of 25.1, 32.5, and 40.7 MeV. An isospin dependent soft-rotator coupled-channels optical model with the potential containing a dispersive term with a nonlocal contribution is used to analyze the data.

Systematics and uncertainties of Hamiltonian parameters of soft-rotator model for actinides and their implications for nuclear data calculations

“…For those cases, the uncertainties in the SRM parameters introduce non-negligible contribution to the calculated cross sections, especially at low energies. In case of 40 Ar for which SRM is not able to describe the collective levels energies in the same accuracy as 238 U [7], uncertainties in some of the cross sections due to those of SRM parameters can be almost 50%.…”

“…We have been developing and applying a computational scheme based on the soft-rotator model (SRM) and a coupledchannel method based on it (SRM-CC) for many years [1][2][3][4][5][6][7]. In this approach, we start considering the nature of lowlying collective levels of even-even nuclei, assigning specific quantum numbers of rotational and vibrational motions, and we search SRM Hamiltonian parameters to reproduce the level energies.…”