States in /sup 139/Pm populated in the decay of N = 77 /sup 139/Sm/sup g/

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.504· OSTI ID:5727336

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

The structure of /sup 139/Pm is investigated through the ..beta../sup +/ decay of /sup 139/Sm/sup g/, whose decay half-life is measured to be 2.57 +- 0.10 min. A level scheme comprising 33 excited states and all the observed 79 transitions is constructed based on information obtained from ..gamma.. ray, ..beta../sup +/, and internal conversion electron spectroscopic measurements. Using the deduced beta decay logft values and transition multipolarities, J/sup ..pi../ assignments are made to states in /sup 139/Pm and to the ground state of /sup 139/Sm. The ..beta../sup +/ end-point energy measurements give a total decay energy Q/sub EC/ = 4.10 +- 0.15 MeV for /sup 139/Sm/sup g/. Systematics of low-lying states in the odd-A, N = 78 isotones are discussed.

• Research Organization: Foster Radiation Laboratory, McGill University, Montreal, Canada
• OSTI ID: 5727336
• 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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Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
COINCIDENCE SPECTROMETRY
CONVERSION
DATA
DECAY
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EUROPIUM 139
EUROPIUM ISOTOPES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FT VALUE
GAMMA RADIATION
HALF-LIFE
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION
IONIZING RADIATIONS
ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PROMETHIUM 139
PROMETHIUM ISOTOPES
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 139
SAMARIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SPIN