Elastic and Inelastic Scattering ofKr86fromPb

Abstract

Elastic and inelastic scattering of 86 Kr on 208 Pb to discrete states have been measured at 695-MeV bombarding energy and the observed differential cross sections have been analyzed with a coupled-channels calculation. The obtained ion-ion potential differs significantly from those derived from previous poor-resolution experiments on similar systems, but is consistent with a global potential based upon lighter-mass systematics.

Inelastic excitation and nucleon transfer in quasielastic reactions between86Kr and208Pb at 18.2 MeV/u beam energy

“…Similar observations were also made in a study of the 2~ 86Kr system at 8.1 MeV/u [15,29]. Already the cross-section for exciting the first 2+-level in 86Kr was found to be as large as the elastic cross-section at and beyond the quarter point angle [15], while the 1 n pick-up channel carried much less cross-section [29]. It is an interesting aside that this 87Kr angular distribution could be described by DWBA where six hole states in z~ and five particle states in 87Kr were considered.…”

“…It means that, in this case, half of all interacting nuclei are excited before nucleon transfer takes place. Similar observations were also made in a study of the 2~ 86Kr system at 8.1 MeV/u [15,29]. Already the cross-section for exciting the first 2+-level in 86Kr was found to be as large as the elastic cross-section at and beyond the quarter point angle [15], while the 1 n pick-up channel carried much less cross-section [29].…”

“…This is taken as evidence for nuclear excitation dominating inelastic scattering, even at low excitation energies. At a bombarding energy of 8.1 MeV/u, for the same sys- tem, Coulomb excitation was found to be of importance [15]. A remark, which also applies to the angular distributions of transfer reactions, seems in place.…”