Excitation and decay of the isovector giant monopole resonances via the 208Pb(3He,t p) reaction at 410 MeV

R G T Zegers; H Abend; H Akimune; A M van den Berg; H Fujimura; H Fujita; Y Fujita; M Fujiwara; S Galès; K Hara; M N Harakeh; T Ishikawa; T Kawabata; K Kawase; T Mibe; K Nakanishi; S Nakayama; H Toyokawa; M Uchida; T Yamagata; K Yamasaki; M Yosoi

doi:10.1103/PhysRevLett.90.202501

Excitation and decay of the isovector giant monopole resonances via the 208Pb(3He,t p) reaction at 410 MeV

Phys Rev Lett. 2003 May 23;90(20):202501. doi: 10.1103/PhysRevLett.90.202501. Epub 2003 May 20.

Authors

Affiliation

¹ Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.

PMID: 12785887
DOI: 10.1103/PhysRevLett.90.202501

Abstract

The excitation and subsequent proton decay of the isovector spin-flip giant monopole resonance (IVSGMR) is studied via the 208Pb(3He,t) reaction at 410 MeV. In the inclusive spectrum (60+/-5)% of the non-energy-weighted sum-rule strength for this 2 variant Planck's over 2h omega resonance was found in the region 29<Ex(208Bi)<51 MeV. The central excitation energy and width of the IVSGMR are 37+/-1 MeV and 14+/-3 MeV, respectively. It is found that the branching ratio for proton decay is (52+/-12)% and that the deep neutron-hole states in 207Pb are strongly fed.