Elsevier

Nuclear Physics A

Volume 467, Issue 4, 15 June 1987, Pages 557-574
Nuclear Physics A

Validity of collective model DWBA analysis for intermediate energy proton scattering to low-lying states of 208Pb

https://doi.org/10.1016/0375-9474(87)90386-1Get rights and content

Abstract

New measurements of inelastic proton scattering to low-lying collective states of 208Pb at 200 and 400 MeV are reported. Deformation lengths (δH = βR) extracted from angular distributions for the 3 (2.614), 51 (3.198 MeV), 52 (3.709 MeV), 2+ (4.086 MeV) and 4+ (4.324 MeV) states are in good accord with values extracted at other incident proton energies. The fact that the deformation lengths for these levels are independent of incident proton energy within experimental uncertainty provides further support of the validity of the collective DWBA for medium energy proton scattering to strongly excited states. Advantage is taken of this to extract more precise values for the ratio of neutron to proton multipole matrix elements for both the low-lying states and the giant quadrupole resonance at 10.6 MeV.

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