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Excitation of isoscalar giant resonances and monopole giant resonance splitting in actinide nuclei

Journal Article · · Phys. Rev. C; (United States)
; ; ; ;

Scattering of 100 and 172 MeV ..cap alpha.. particles has been used to study giant resonances in /sup 232/Th and /sup 238/U. First, experiments have been performed at scattering angles between 8 and 17/sup 0/ using a 1 m scattering chamber. Consistent fits to these data at both incident energies indicate that the giant monopole resonance in these nuclei splits into two parts separated by more than 4 MeV. This is confirmed by new magnetic spectrograph results which have been obtained in the angular region 3--5/sup 0/. A splitting of the monopole strength as deduced from our data can be explained by mixing of giant monopole and quadrupole resonances in these deformed nuclei. From the angular dependence of the differential cross sections evidence for the existence of odd parity (L = 1,3) giant resonances at high excitation energies is obtained. From the small angle data the giant octupole resonance was located at E/sub x/ = 19.6 +- 1 MeV with a width GAMMA(FWHM) = 6.5 +- 1 MeV.

Research Organization:
Institut fuer Kernphysik, Kernforschungsanlage Juelich, D-5170 Juelich, West Germany
OSTI ID:
5019224
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 25:6; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

652023* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Energy Levels & Transitions-- (-1987)
652025 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ALPHA REACTIONS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GIANT RESONANCE
HEAVY NUCLEI
INELASTIC SCATTERING
INFORMATION
ISOTOPES
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
RESONANCE
SCATTERING
SPIN
TARGETS
THORIUM 232
THORIUM 232 TARGET
THORIUM ISOTOPES
URANIUM 238
URANIUM 238 TARGET
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES