Structure of /sup 141/Pm from decay of N = 79 /sup 141/Sm

Journal Article · Mon Jan 31 23:00:00 EST 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.792· OSTI ID:7124148

Kennedy, G G; Deslauriers, J; Gujrathi, S C; Mark, S K

The 10.2 min /sup 141/Sm/sup g/ decay has been investigated. Positron, ..gamma..-ray singles, ..gamma..--..gamma.., and ..beta../sup +/--..gamma.. coincidence as well as conversion electron measurements led to a decay scheme comprising 27 transitions among 12 excited states with deduced J/sup ..pi../ assignments in /sup 141/Pm. The J/sup ..pi../ = 1/2/sup +/ for /sup 141/Sm/sup g/ is confirmed. Internal conversion electrons resulting from the decay of 22.6 min /sup 141/Sm/sup m/ have also been measured. The half-life of the 11/2/sup -/ state at 628.6 keV in /sup 141/Pm populated in the latter decay has been measured to be 0.59+-0.02 ..mu..s. The ..beta../sup +/ end point energy measurements yielded decay energy Q/sub EC/ = 4.70+-0.06 MeV and 4.56+-0.04 MeV for /sup 141/Sm/sup m/ and /sup 141/Sm/sup g/, respectively, and these values are compared with predictions of mass formulas. Systematics of the low-lying states and the B(M2) and B(E3) reduced transition rates in the odd-A, N = 80 isotones are discussed.

• Research Organization: Foster Radiation Laboratory, McGill University, Montreal, Canada
• OSTI ID: 7124148
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CONVERSION
DAYS LIVING RADIOISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
EVEN-ODD NUCLEI
FERMIONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LEPTONIC DECAY
LEPTONS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PARTICLE DECAY
PARTICLE PROPERTIES
PROMETHIUM 141
PROMETHIUM ISOTOPES
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 141
SAMARIUM ISOTOPES
SPECTRA
WEAK INTERACTIONS
WEAK PARTICLE DECAY