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Search for isovector giant monopole resonances via the Pb(He-3,tp)reaction

Abstract : The Pb-nat(He-3, tp) reaction at E(He-3) = 177 MeV was studied to identify 2hw 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.
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Contributor : Suzanne Robert Connect in order to contact the contributor
Submitted on : Tuesday, May 30, 2000 - 4:22:23 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:08 PM


  • HAL Id : in2p3-00022484, version 1



R.G.T. Zegers, A.M. van den Berg, S. Brandenburg, F.R.R. Fleurot, M. Fujiwara, et al.. Search for isovector giant monopole resonances via the Pb(He-3,tp)reaction. Physical Review Letters, American Physical Society, 2000, 84, pp.3779-3782. ⟨in2p3-00022484⟩



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