Decay of the high-spin isomers in /sup 150,151,152/Ho

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.298· OSTI ID:6247717

Toth, K S; Bingham, C R; Carter, H K; Ritchie, B G; Sousa, D C; Zolnowski, D R

The electron-capture decay properties of the high-spin isomers in /sup 150,151,152/Ho were investigated. The nuclides were produced in /sup 10/B bombardments of samarium and then transported to shielded areas with the use of gas-jet systems. Singles and coincidence ..gamma..-ray measurements were made. Each isomer decays primarily to one excited state in its dysprosium daughter by means of an allowed ..beta.. transition (logft values are approx. 4.5). The following explanations are proposed. For /sup 150/Ho and /sup 152/Ho the transitions connect 9/sup +/(..pi..h/sub 11/2/,..nu..f/sub 7/2/) levels with 8/sup +/(..nu..h/sub 9/2/,..nu..f/sub 7/2/) levels in /sup 150/Dy(2401.8 keV) and /sup 152/Dy(2437.6 keV). Deexcitation to the ground states then follows via a cascade of four E2 ..gamma.. rays. In /sup 151/Ho the ..beta.. transition represents the changeover of an h/sub 11/2/ proton orbital to an h/sub 9/2/ neutron orbital in /sup 151/Dy. This single neutron state lies at 527.4 keV and deexcites directly to the ground state. The ..cap alpha.. decay of /sup 152/Ho was also investigated with the use of an on-line isotope separator. Its ..cap alpha..-decay branching ratio was determined to be 10.5 +- 3.0%.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6247717
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 20:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651822* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Radioactive Decay-- (-1987)
651823 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ALPHA SPECTRA
BETA DECAY
BORON 10 REACTIONS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
DECAY
ELECTRON CAPTURE DECAY
ELEMENTS
ENERGY LEVELS
FT VALUE
GAMMA SPECTRA
HALF-LIFE
HEAVY ION REACTIONS
HIGH SPIN STATES
HOLMIUM 150
HOLMIUM 151
HOLMIUM 152
HOLMIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
METALS
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RARE EARTHS
SAMARIUM
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTRA