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N = 85 nuclei. II. Decay of 4. 15-h /sup 149/Tb/sup g/ to levels of /sup 149/Gd

Journal Article · · Phys. Rev., C; (United States)
; ; ; ;

The ..gamma..-ray spectrum accompanying the decay of 4.15-h /sup 149/Tb/sup g/ has been studied by Ge(Li) singles and coincidence spectroscopy. Sources were prepared via the /sup 141/Pr(/sup 12/C,4n) reaction and via spallation of Ta with 800-MeV protons. Chemical and isotropic separation techniques were employed to obtain pure sources. A total of 325 ..gamma.. rays are attributed to the decay of /sup 149/Tb/sup g/, all of which have been placed in a /sup 149/Gd level scheme involving 80 excited states. The spin and parity of /sup 149/Tb/sup g/ is postulated to be 1/2/sup +/. The intensity of the direct ..beta../sup +/ + electron capture branch from /sup 149/Tb/sup g/ to the /sup 149/Gd ground state (7/2/sup -/) is determined to be (0.5 * 5.0) %. The intensity of the ..cap alpha..-decay branch from /sup 149/Tb/sup g/ to /sup 145/Eu has been measured to be (15.8 < +- The observed level structure of /sup 149/Gd is discussed in terms of current nuclear models.

Research Organization:
Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545
OSTI ID:
6684946
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:4; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651722* -- Nuclear Properties &amp; Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY SPECTRA
EVEN-ODD NUCLEI
FERMIONS
FT VALUE
GADOLINIUM 149
GADOLINIUM ISOTOPES
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONIC DECAY
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
PRASEODYMIUM 141 TARGET
PROTON REACTIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPALLATION
SPECTRA
SPIN
TANTALUM 181 TARGET
TARGETS
TERBIUM 149
TERBIUM ISOTOPES
WEAK INTERACTIONS
WEAK PARTICLE DECAY