Gamma-gamma directional correlations in /sup 201/Hg
Journal Article
·
· Phys. Rev., C; (United States)
The directional correlations of the 135.3-32.2 keV and the 135.3-30.6 keV ..gamma..-..gamma.. cascades in /sup 201/Hg (following electron capture decay of /sup 201/Tl) were measured using a 5 cm x 5 cm NaI(Tl) detector and a 78.5 mm/sup 2/ x 5 mm Si(Li) detector. The results obtained were W (theta) = 1 + (0.184 +- 0.030) P/sub 2/(costheta) and W (theta) = 1 + (0.175 +- 0.040) P/sub 2/(costheta), respectively. Starting with the known ground-state spins of /sup 201/Tl and /sup 201/Hg, the directional correlations give results consistent with the following spin assignments: 3/2/sup -/(0 keV), 3/2/sup -/(1.6 keV), 3/2/sup -/(32.2 keV), and 3/2/sup -/(167.4 keV). Assuming that the 135.3-keV ..gamma.. transition is M1 + 0.1% E2 (which is consistent with internal-conversion measurements), the directional correlation results are consistent with multipolarities of M1 + < or = 0.3% E2 for the 32.2-keV ..gamma.. ray and M1 + < or = 0.4% E2 for the 30.6-keV ..gamma.. ray. The corresponding values of the mixing ratios are - 0.0634 < or = delta (30.6) < or = 0.0515 and - 0.0361 < or = delta (32.2) < or = 0.0506. These results are in mixed agreement with previous measurements.
- Research Organization:
- Department of Physics, West Virginia University, Morgantown, West Virginia 26506
- OSTI ID:
- 6668889
- Journal Information:
- Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:2; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651922* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Radioactive Decay-- (-1987)
651923 -- Nuclear Properties & Reactions
A=190-219
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR MOMENTUM
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
COINCIDENCE SPECTROMETRY
CONVERSION
CORRELATIONS
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
GAMMA CASCADES
HALF-LIFE
HEAVY NUCLEI
INTERACTIONS
INTERNAL CONVERSION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONIC DECAY
MERCURY 201
MERCURY ISOTOPES
MIXING RATIO
MULTIPOLARITY
NUCLEAR CASCADES
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
THALLIUM 201
THALLIUM ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY
A=190-219
Experimental-- Radioactive Decay-- (-1987)
651923 -- Nuclear Properties & Reactions
A=190-219
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR MOMENTUM
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
COINCIDENCE SPECTROMETRY
CONVERSION
CORRELATIONS
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
GAMMA CASCADES
HALF-LIFE
HEAVY NUCLEI
INTERACTIONS
INTERNAL CONVERSION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONIC DECAY
MERCURY 201
MERCURY ISOTOPES
MIXING RATIO
MULTIPOLARITY
NUCLEAR CASCADES
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
THALLIUM 201
THALLIUM ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY