Isospin distribution of quadrupole strength inSn118: Comparison with pion, nucleon, and electron scattering

Isospin character of transitions to bound states inPb204,206,208Hören1, Auble2, Beene3 et al. 1991Phys. Rev. CSelf Cite22320View full textAdd to dashboardCite

“…5 The calculations presented here, which have been described in detail elsewhere [9], utilize a quasiparticle RPA model with separable isoscalar and iso0ector particle-hole interactions. The present results for Pb have been compared to other RPA calculations in Ref.…”

“…INTRODUCTION data for the GQR [9]. These authors concluded that the problem does not appear to be associated with differences in the neutron and proton.…”

“…calculations [7,9] [7]. Although Brown, Carr, Madsen, and Petrovich [9] did not use continuum wave functions, they repeated the cross-section calculations using a neutron radius 10%%uo larger than that for the protons in their comparison with the " Sn data.…”

Isospin dependence of the isoscalar giant quadrupole response: Relevance to pion scattering in the Ni isotopes

“…As an example, we undertake an explicit study of the isospin nature of the nuclear response in the GQR channel pion scattering by examining the recent inelastic scattering results of zc-and 7c + from 58'6~ [6]. The experimental results of 180 MeV pion beam at LAMPF show prominent quadrupole features that have been identified as predominantly isoscalar in character [3,6]. For the heavier isotopes, the zc-scattering cross sections greatly exceed those for ~z + (and are in that context consistent with pion scattering observations on heavier nuclei) [7,8].…”

“…Of course, analyses of pion elastic scattering experiments should take into account the highly selective nature of resonance pions at the nuclear surface [3][4][5]. The purpose of this paper is then to point out the extent to which pion scattering cross sections will reflect the difference between proton and neutron density distributions at the nuclear surface (which can of course differ from bulk distribution results).…”