title: Search for isovector giant monopole resonances via the Pb(3He,tp) reaction
abstract: The (nat)Pb(3He,tp) reaction at E(3He) = 177 MeV was studied to identify 2Planck's over 2piomega isovector monopole strength in Bi isotopes. Monopole strength was found in the region -45<Q<-30 MeV in the coincidence data. The cross section is compared with distorted-wave Born approximation calculations for non-spin-flip and spin-flip isovector monopole resonances. The observed spin-flip and non-spin-flip monopole strengths in the proton-decay channel amount to 20% of the respective non-energy-weighted sum rule.
authors.affiliation: Kernfysisch Versneller Instituut, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands.
authors.initials: RG
authors.lastname: Zegers
authors.lastname: van Den Berg AM
authors.initials: S
authors.lastname: Brandenburg
authors.initials: FR
authors.lastname: Fleurot
authors.initials: M
authors.lastname: Fujiwara
authors.initials: J
authors.lastname: Guillot
authors.initials: VM
authors.lastname: Hannen
authors.initials: MN
authors.lastname: Harakeh
authors.initials: H
authors.lastname: Laurent
authors.lastname: van Der Schaaf K
authors.lastname: van Der Werf SY
authors.initials: A
authors.lastname: Willis
authors.initials: HW
authors.lastname: Wilschut