Electromagnetic decay of giant resonances [electronic resource]
Coincidence experiments were done to investigate the photon and neutron emission from the giant resonance regions of ²°⁸Pb and ⁹°Zr using the ORNL Spin Spectrometer, a 72-segment NaI detector system. We have determined the total gamma-decay probability, the ground-state gamma branching ratio, and th...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Oak Ridge, Tenn. : Oak Ridge, Tenn. :
Oak Ridge National Laboratory. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1985.
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| Summary: | Coincidence experiments were done to investigate the photon and neutron emission from the giant resonance regions of ²°⁸Pb and ⁹°Zr using the ORNL Spin Spectrometer, a 72-segment NaI detector system. 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 ²°⁸Pb to approx.15 MeV. Similar data were also obtained on ⁹°Zr. The total yield of ground-state E2 gamma radiation in ²°⁸Pb and the comparative absence of such radiation in ⁹°Zr can only be understood if decay of compound (damped) states is considered. Other observations in ²°⁸Pb include the absence of a significant branch from the giant quadrupole resonance (GQR) to the 3⁻ state at 2.6 MeV, a strong branch to a 3⁻ state at 4.97 MeV from the same region, and transitions to various 1⁻ states between 5 to 7 MeV from the E* approx. 14 MeV region (EO resonance) |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/1985. "conf-8505166-2" "DE85012422" Symposium on nuclear structure, Copenhagen, Denmark, 20 May 1985. Robinson, R.L.; Horen, D.J.; Halbert, M.L.; Sayer, R.O.; Auble, R.L.; Hensley, D.C.; Bertrand, F.E.; Beene, J.R.; Sjoreen, T.P. |
| Physical Description: | Pages: 16 : digital, PDF file. |