Decay properties of /sup 153/Yb and /sup 153/Tm; Excitation energies of the s/sub 1/2/ and h/sub 11/2/ proton states in /sup 153/Tm

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.636· OSTI ID:6530662

Kortelahti, M O; Toth, K S; Vierinen, K S; Nitschke, J M; Wilmarth, P A; Firestone, R B; Chasteler, R M; Shihab-Eldin, A A

The decay properties of /sup 153/Yb and /sup 153/Tm, produced in /sup 64/Zn bombardments of /sup 92/Mo, were investigated following on-line mass separation. A decay scheme, incorporating 34 transitions and 25 levels in /sup 153/Tm, was constructed for /sup 153/Yb. It establishes the s/sub 1/2/ proton level in /sup 153/Tm to be isomeric at an excitation energy of 43.2 keV. The ..cap alpha..-decay branch of the h/sub 11/2/ /sup 153/Tm ground state was determined to be 91 +- 3%. In addition, a partial decay scheme was put together for the 9% ..beta../sup +/ branch. About 66% of this ..beta../sup +/ decay proceeds to the h/sub 9/2/ neutron state located at 299.3 keV in /sup 153/Er. Only one transition, 266.5 keV, could be assigned to the ..beta../sup +/ decay of the /sup 153/Tm s/sub 1/2/ isomer; it is suggested that the ..gamma.. ray deexcites the p/sub 3/2/ neutron level to the f/sub 7/2/ /sup 153/Er ground state. Based on the intensity of this 266.5-keV ..gamma.. ray, the isomer's ..cap alpha.. branch was estimated to be approx.93%.

• Research Organization: Louisiana State University, Baton Rouge, Louisiana 70803
• OSTI ID: 6530662
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BETA DECAY
BETA-PLUS DECAY
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
DATA
DECAY
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GAMMA SPECTRA
HALF-LIFE
HEAVY ION ACCELERATORS
HEAVY ION REACTIONS
HILACS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITIONS
ISOTOPE SEPARATION
ISOTOPES
LINEAR ACCELERATORS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MOLYBDENUM 92 TARGET
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SECONDS LIVING RADIOISOTOPES
SEPARATION PROCESSES
SHELL MODELS
SPECTRA
SPIN
SUPERHILAC
TARGETS
THULIUM 153
THULIUM ISOTOPES
YTTERBIUM 153
YTTERBIUM ISOTOPES
ZINC 64 REACTIONS