epsilon/. beta. /sup +/ decay of /sup 145/Gd: Resolution of epsilon/. beta. /sup +/ decay branching ratio anomalies and evidence for pronounced structures in the. beta. -decay strength

Journal Article · Thu Dec 31 23:00:00 EST 1981 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.527· OSTI ID:5727334

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

The epsilon/..beta../sup +/ decay of 23.0 min /sup 145/Gd has been thoroughly studied with Ge(Li) and plastic scintillator detectors. A total of 326 ..gamma.. rays deexciting 136 levels in /sup 145/Eu have been placed by this work. The available decay energy, Q/sub epsilon/ = 5.07 +- 0.06 MeV, was measured by ..beta..-..gamma.. coincidence techniques. epsilon/..beta..-decay branching ratios have been measured for several transitions, and a long standing anomaly in those ratios has been resolved by the new Q/sub epsilon/ value and the discovery of additional electron-capture decay. We have investigated the ..beta.. strength function for /sup 145/Gd and discovered pronounced structure with resonances at 1042, 1819, 2484, and 4500 keV. The 1042-keV resonance is proposed to result from a (..pi..d/sub 3/2/)/sup 2/(..nu..s/sub 1/2/)/sup -1/..-->..(..pi..d/sub 3/2/)/sup 1/ ..beta.. transitions, the 1919- and 2584-keV resonances from (..pi..d/sub 5/2/)/sup 2/ ..-->.. ((..pi..d/sub 5/2/)x2/sup +/)/sub 1,2/ decays, and the very strong 4500-keV resonance from the (..pi..h/sub 11/2/)/sup 2/..-->..(..pi..h/sub 11/2/)x(..nu..h/sub 9/2/ +..nu..f/sub 7/2/+xxx) transition across the shell closure.

• Research Organization: National Superconducting Cyclotron Laboratory and Departments of Chemistry and Physics, Michigan State University, East Lansing, Michigan 48824
• OSTI ID: 5727334
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 25:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651722* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
BRANCHING RATIO
COINCIDENCE SPECTROMETRY
DATA
DAYS LIVING RADIOISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
EUROPIUM 145
EUROPIUM ISOTOPES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GADOLINIUM 145
GADOLINIUM ISOTOPES
GAMMA RADIATION
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PLASTIC SCINTILLATION DETECTORS
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCINTILLATION COUNTERS
SHELL MODELS
SOLID SCINTILLATION DETECTORS