Giant resonances in excited Sn isotopes
Journal Article
·
· Phys. Rev. C; (United States)
The giant dipole resonance built on excited states was studied in /sup 110,112/Sn nuclei at excitation energies of 62, 80, 110, and 130 MeV, by measuring ..gamma.. rays following heavy ion fusion reactions /sup 16/O+ /sup 94/Mo and /sup 19/F+ /sup 93/Nb. The energy of the dipole resonance was found to be 14.8 +- 0.4 MeV independent of excitation energy. This value is approximately 1 MeV below the extrapolated ground state value. The width increases almost quadratically from 6.7 MeV at 62 MeV to 10.8 MeV at 130 MeV. This agrees qualitatively with a theoretical prediction that the increase in width for these nuclei is mainly due to an averaging of strength functions over various oblate shapes induced at high spin and temperature. The sensitivity to the isovector quadrupole vibration was found to be small even at the highest excitation energy. No convincing conclusion could be made for its existence in these Sn nuclei.
- Research Organization:
- Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
- OSTI ID:
- 5854264
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:5; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Wed Dec 31 23:00:00 EST 1986
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Journal Article
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· Physical Review Letters
·
OSTI ID:20696499
Gamma decay of isovector giant resonances built on highly excited states in /sup 111/Sn
Journal Article
·
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· Phys. Rev. Lett.; (United States)
·
OSTI ID:5676706
Related Subjects
651720* -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND NUCLEI
CROSS SECTIONS
DIPOLE MOMENTS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
EVEN-EVEN NUCLEI
FLUORINE 19 REACTIONS
FUNCTIONS
GAMMA RADIATION
GIANT RESONANCE
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
MOLYBDENUM 94 TARGET
NIOBIUM 93 TARGET
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16 REACTIONS
RADIATIONS
RADIOISOTOPES
RESONANCE
STABLE ISOTOPES
STRENGTH FUNCTIONS
TARGETS
TIME-OF-FLIGHT METHOD
TIN 110
TIN 112
TIN ISOTOPES
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND NUCLEI
CROSS SECTIONS
DIPOLE MOMENTS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
EVEN-EVEN NUCLEI
FLUORINE 19 REACTIONS
FUNCTIONS
GAMMA RADIATION
GIANT RESONANCE
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
MOLYBDENUM 94 TARGET
NIOBIUM 93 TARGET
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16 REACTIONS
RADIATIONS
RADIOISOTOPES
RESONANCE
STABLE ISOTOPES
STRENGTH FUNCTIONS
TARGETS
TIME-OF-FLIGHT METHOD
TIN 110
TIN 112
TIN ISOTOPES