Excited states in /sup 118/Sn populated by the. beta. /sup -/ decay of /sup 118/In/sup g/ and /sup 118/Sb
The /sup 118/In/sup g/ activity has been obtained by chemical separation of the parent nucleus /sup 118/Cd from a UO/sub 2/(NO/sub 3/)/sub 2/ x 6H/sub 2/O sample, irradiated with 25- and 50-MeV bremsstrahlung. Two successive Ge(Li) ..gamma..-ray spectra were measured. Several new ..gamma.. rays were found and the relative intensities of the known ..gamma.. lines are compared and discussed with respect to the existing data. Levels in /sup 118/Sn at 0, 1229.64, 1757.8, 2043.1, 2056.5, 2326.5, 2402.5, and 3137.2 keV were found to be fed in the ..beta../sup -/ decay of /sup 118/In/sup g/. Based on the measured post-neutron yields of the masses 111, 112, 113, 115, 117, 123, and 125 for the photofission of /sup 238/U with 25- and 50-MeV bremsstrahlung, the post-neutron yield of mass 118 was obtained by interpolation, assuming a smooth behavior of the mass distribution in this region. From this the absolute intensity of the observed ..gamma.. lines could be determined. Intensities for all ..beta.. branches and corresponding logft values were calculated. The results of this study differ considerably from those known in the literature. The ..beta.. decay rates for /sup 118/In and /sup 118/Sb are compared with results of nuclear structure calculations. The systematics of logft values for the 1g/sub 9///sub 2/ arrow-right-left 1g/sub 7///sub 2/ Gamow-Teller ..beta.. decay is correlated with the filling of the 1g/sub 7///sub 2/ neutron single-particle orbit for increasing A.
- Research Organization:
- Laboratorium voor Kernfysica, Proeftuinstraat 86, B-9000 Gent, Belgium
- OSTI ID:
- 7223935
- Journal Information:
- Phys. Rev., C; (United States), Vol. 15:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHOTONUCLEAR REACTIONS
PHOTOFISSION
URANIUM 238 TARGET
INDIUM 118
BETA-MINUS DECAY
TIN 118
ENERGY LEVELS
ANTIMONY 118
BETA-PLUS DECAY
ANTIMONY ISOTOPES
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY RANGE
EVEN-EVEN NUCLEI
FISSION
HOURS LIVING RADIOISOTOPES
INDIUM ISOTOPES
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONIC DECAY
MEV RANGE
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARTICLE DECAY
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS
TIN ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
YIELDS
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