Level structure of /sup 131/Cs and the decay energy of /sup 131/Ba

Journal Article · Mon Nov 01 04:00:00 EST 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.14.1896· OSTI ID:7346696

Gehrke, R J; Helmer, R G; Reich, C W; Greenwood, R C; Anderl, R A

The decay of /sup 131/Ba (11.7 day) has been studied with Ge(Li) spectrometers and with a Ge(Li) ..gamma..-..gamma.. coincidence system. Twelve ..gamma.. transitions and three levels in /sup 131/Cs at 919, 1170, and 1342 keV have been identified which were not reported previously. Upper limits are given for the ..gamma..-ray intensities of previously reported transitions at 323 and 508 keV which were not observed in this experiment. The Q value for the decay of /sup 131/Ba was determined from the (electron capture)/..beta../sup +/ intensity ratio to be 1372/sup +10//sub -//sub 20/ keV. This value agrees with the latest atomic mass evaluation, but disagrees with the only previous measurement by 207 keV. Our (electron capture)/..beta../sup +/ intensity ratio and the Q value deduced from a reaction study suggest that the (electron capture)/..beta../sup +/ ratio is not anomalous in contrast to some recent predictions. The /sup 131/Cs level structure and ..gamma.. transition probabilities are compared to the result of an intermediate-coupling calculation. (AIP)

• Research Organization: Idaho National Engineering Laboratory, Aerojet Nuclear Company, Idaho Falls, Idaho 83401
• OSTI ID: 7346696
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651722* -- Nuclear Properties & Reactions
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Experimental-- Radioactive Decay-- (-1987)
651723 -- Nuclear Properties & Reactions
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Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BARIUM 131
BARIUM ISOTOPES
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BRANCHING RATIO
CESIUM 131
CESIUM ISOTOPES
COINCIDENCE SPECTROMETRY
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FT VALUE
GAMMA SPECTRA
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE SEPARATION
ISOTOPES
LEPTONIC DECAY
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PARTICLE DECAY
Q-VALUE
RADIOISOTOPES
SEPARATION PROCESSES
SPECTRA
WEAK INTERACTIONS
WEAK PARTICLE DECAY