COULOMB EXCITATION OF THE SECOND 2+ STATES IN W, Os, AND Pt NUCLEI
The location of a second 2+ state is established for six -even-even nuclei by means of Coulomb excitation produced by 4 to 5 Mev protons. The relatively weak excitation of these states is detected by a measurement of the gammaray yields from singles spectra and from coincident measurements of the cascade gamma rays. The B(E2)'s for decay of the second 2+ state to ground state by the crossover transition exhibit some uniformity for the even-even isotopes of W and Os, being about 6 times the single-particle value. The cascade/crossover ratio for the decay of the second 2+ state is known for these nuclei. The upper cascade B(E2)'s exhibit enhancements of 10 to 60 times the single-particle value. The ratios of the B(E2)'s for decay of the first and second 2+ states are compared to the predictions of several collective models. For five of these nuclei the E2/M1 ratio is known for the upper cascade transition. The B(M1) values obtained are exceedingly small compared to the single-particle estimate. This result is in qualitative agreement with the collective models which predict that M1 radiation is forbidden in the decay of vibrational excitations. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-15-018800
- OSTI ID:
- 4011540
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 122; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
CHARGED PARTICLES
COINCIDENCE METHODS
COLLECTIVE MODEL
COULOMB EXCITATION
DECAY
ELECTRIC FIELDS
ELECTRONS
ENERGY LEVELS
ENERGY RANGE
EVEN EVEN NUCLEI
EXCITATION
GAMMA CASCADES
GAMMA RADIATION
MEASURED VALUES
NUCLEAR MODELS
NUCLEI
OSMIUM
PARITY
PLATINUM
PROTONS
SPECTRA
SPIN
TRANSIENTS
TUNGSTEN
VIBRATIONS