Crystal ball studies of giant resonance gamma decay
Conference
·
· AIP Conf. Proc.; (United States)
OSTI ID:5507958
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 stats 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--7 MeV from the region around 14 MeV of excitation (E0 resonances). Comparable but less complete data were also obtained on /sup 90/Zr.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5507958
- Report Number(s):
- CONF-840906-
- Conference Information:
- Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 125:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651720 -- Nuclear Properties & Reactions
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651920* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
GAMMA RADIATION
GAMMA SPECTRA
GIANT RESONANCE
HEAVY ION REACTIONS
INELASTIC SCATTERING
IONIZING RADIATIONS
ISOTOPES
LEAD 208 TARGET
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 17
OXYGEN 17 REACTIONS
OXYGEN ISOTOPES
PARTICLE-HOLE MODEL
RADIATIONS
RESONANCE
SCATTERING
SPECTRA
STABLE ISOTOPES
TARGETS
ZIRCONIUM 90 TARGET
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651920* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
GAMMA RADIATION
GAMMA SPECTRA
GIANT RESONANCE
HEAVY ION REACTIONS
INELASTIC SCATTERING
IONIZING RADIATIONS
ISOTOPES
LEAD 208 TARGET
LIGHT NUCLEI
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 17
OXYGEN 17 REACTIONS
OXYGEN ISOTOPES
PARTICLE-HOLE MODEL
RADIATIONS
RESONANCE
SCATTERING
SPECTRA
STABLE ISOTOPES
TARGETS
ZIRCONIUM 90 TARGET