Decay of /sup 143/Gd/sup m+g/ by positron emission and electron capture

Journal Article · Wed Feb 01 00:00:00 EST 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.17.718· OSTI ID:7276134

Firestone, R B; Warner, R A; McHarris, W C; Kelly, W H

In the study the decay of /sup 143/Gd/sup g+m/ by positron emission and electron capture and the isomeric decay of /sup 143/Eu/sup m/ were investigated. ..gamma.. rays associated with /sup 143/Gd/sup g+m/ were placed on the basis of excitation functions, half-life, and ..gamma..-..gamma.. coincidence information. We assigned 61 ..gamma.. rays deexciting 33 levels in /sup 143/Eu from the decay of 112 +- 2 sec /sup 143/Gd/sup m/. Another 7 ..gamma.. rays deexcite an additional 6 levels in /sup 143/Eu from 39 +- 2 sec /sup 143/Gd/sup g/ decay. A small delayed p or ..cap alpha.. branch associated with /sup 143/Gd decay was observed with an upper limit of 1 x 10/sup -5/. The half-life of the /sup 143/Eu/sup m/ isomer at 389.47 keV was found to be 50.0 +- 0.5 ..mu..sec. The resulting level structure observed in /sup 143/Eu is explained quite satisfactorily in terms of a triaxial weak-coupling model.

• Research Organization: Department of Chemistry, Cyclotron Laboratory, and Department of Physics
• OSTI ID: 7276134
• Journal Information: Phys. Rev., C; (United States), Vol. 17:2
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EUROPIUM 143
ENERGY LEVELS
ISOMERIC TRANSITIONS
GADOLINIUM 143
BETA-PLUS DECAY
ELECTRON CAPTURE DECAY
COINCIDENCE SPECTROMETRY
EXCITATION FUNCTIONS
FT VALUE
GAMMA SPECTRA
HALF-LIFE
PARITY
SPIN
WEAK-COUPLING MODEL
ANGULAR MOMENTUM
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CROSS SECTIONS
DECAY
ENERGY-LEVEL TRANSITIONS
EUROPIUM ISOTOPES
EVEN-ODD NUCLEI
GADOLINIUM ISOTOPES
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONIC DECAY
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE DECAY
PARTICLE PROPERTIES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
WEAK INTERACTIONS
WEAK PARTICLE DECAY
651722* - Nuclear Properties & Reactions
A=90-149
Experimental- Radioactive Decay- (-1987)
651723 - Nuclear Properties & Reactions
A=90-149
Experimental- Energy Levels & Transitions- (-1987)