Decay properties of /sup 150/Tm and /sup 150/Er

Journal Article · Sun Feb 01 00:00:00 EST 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.35.620· OSTI ID:6749868

Toth, K S; Sousa, D C; Nitschke, J M; Wilmarth, P A

The decay properties of /sup 150/Tm and /sup 150/Er (produced in /sup 58/Ni bombardments of /sup 96/Ru) were investigated following on-line mass separation. The half-life of /sup 150/Tm was measured to be 2.2 +- 0.2 s rather than the value of 3.5 s available in the literature. Based on its decay characteristics, we suggest that this high-spin /sup 150/Tm isomer has a spin assignment of 6/sup -/. Among the /sup 150/Er states fed by this 6/sup -/ isomer is the yrast 4/sup +/ level (2294.8 keV) which up to now has been observed in neither ..beta..-decay nor in-beam ..gamma..-ray studies. New transitions observed in /sup 150/Er decay establish several previously unknown levels in /sup 150/Ho. While the additional ..gamma.. rays reduce from 100% to 96% the feeding to the 476-keV state in /sup 150/Ho known earlier, the corresponding logft value is calculated to be 3.6, indicating that this is an allowed, 0/sup +/..-->..1/sup +/, beta transition. Photon intensities obtained for ..gamma.. rays following the decay of the /sup 150/Ho low-spin isomer resolve inconsistent values measured in two previous investigations.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400; AC03-76SF00098
• OSTI ID: 6749868
• Journal Information: Phys. Rev. C; (United States), Vol. 35:2
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ERBIUM 150
BETA-PLUS DECAY
YRAST STATES
HOLMIUM 150
ENERGY-LEVEL TRANSITIONS
THULIUM 150
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
EXPERIMENTAL DATA
FT VALUE
GAMMA SPECTRA
HALF-LIFE
ISOMERIC NUCLEI
NICKEL 58 REACTIONS
PHOTONS
RUTHENIUM 96 TARGET
SCINTILLATION COUNTERS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
ERBIUM ISOTOPES
EVEN-EVEN NUCLEI
HEAVY ION REACTIONS
HOLMIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
RADIATION DETECTORS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
TARGETS
THULIUM ISOTOPES
651820* - Nuclear Properties & Reactions
A=150-189
Experimental