Crystal ball studies of giant resonance gamma decay

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We have carried out coincidence experiments to investigate the photon and neutron emission from the giant resonance region in /sup 208/Pb and /sup 90/Zr using the ORNL Spin Spectrometer, a 72-segment NaI detector system. States in /sup 208/Pb and /sup 90/Zr were excited by inelastic scattering of 380-MeV /sup 17/O. We have determined the total gamma-decay probability, the ground-state gamma branching ratio, and the branching ratios to a number of low-lying states as a function of excitation energy in /sup 208/Pb to approx. 15 MeV. Especially interesting observations include the absence of a significant branch from the giant quadrupole resonance ... continued below

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Pages: 14

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Beene, J.R.; Bertrand, F.E. & Halbert, M.L. January 1, 1984.

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Description

We have carried out coincidence experiments to investigate the photon and neutron emission from the giant resonance region in /sup 208/Pb and /sup 90/Zr using the ORNL Spin Spectrometer, a 72-segment NaI detector system. States in /sup 208/Pb and /sup 90/Zr were excited by inelastic scattering of 380-MeV /sup 17/O. We have determined the total gamma-decay probability, the ground-state gamma branching ratio, and the branching ratios to a number of low-lying states as a function of excitation energy in /sup 208/Pb to approx. 15 MeV. Especially interesting observations include the absence of a significant branch from the giant quadrupole resonance to the 3/sup -/ state at 2.6 MeV, a strong branch from this resonance to a 3/sup -/ state at 4.9 MeV, and the dominance of decays to various 1/sup -/ states at 5 to 7 MeV from the region around 14 MeV of excitation (EO resonance). Comparable but less complete data were also obtained on /sup 90/Zr. 14 references.

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Pages: 14

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NTIS, PC A 02/MF A01.

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  • Capture gamma-ray spectroscopy conference, Knoxville, TN, USA, 10 Sep 1984

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  • Other: DE85003543
  • Report No.: CONF-840906-14
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 6190696
  • Archival Resource Key: ark:/67531/metadc1108900

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  • January 1, 1984

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  • Feb. 22, 2018, 7:45 p.m.

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  • May 11, 2018, 12:42 p.m.

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Beene, J.R.; Bertrand, F.E. & Halbert, M.L. Crystal ball studies of giant resonance gamma decay, article, January 1, 1984; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1108900/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.