NEUTRON-DEFICIENT NUCLIDES OF HAFNIUM AND LUTETIUM

Journal Article · Thu Jun 01 04:00:00 EDT 1961 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.122.1558· OSTI ID:4057939

Merz, E R; Caretto, Jr, A A

Neutron-deficient nuclides of lutetium and hafnium were produced by bombarding lutetium oxide with 300 to 400 Mev protons. The positron spectra of the different nuclides were measured with an anthracene crystal detector and a 256channel pulse height analyzer. Gamma radiation was also observed for Lu/sup 1/ /sup 6//sup 8/, Lu/sup 1//sup 6//sup 9/, Lu/sup 1//sup 7//sup 0/, Hf/sup 1//sup 6/ /sup 8/, and Hf/sup 1//sup 6//sup 9/ by means of a Nal crystal detector and the pulse height analyzer. The half lives and maximum positron energies observed were: Lu/sup 1//sup 6//sup 8/, T/sub 1//sub ///sub 2/ = 7.0 min, E /sub sub b/ /sub b/+ = (1.20 plus or minus 0.05) Mev; Lu/sup 1//sup 6//sup 9/, T/sub 1//sub / //sub 2/ = 1.5 days; Lu/sup 1//sup 7//sup 0/, T/sub 1//sub ///sub 2/ = 1.9 days, E/sub sub b//sub b/+ = (1.8 plus or minus 0.1) Mev; Hf/sup 1//sup 6//sup 8/ T/sub 1//sub ///sub 2/ = 22 min, E/sub beta +/ = (1.7 plus or minus 0.1) Mev; Hf/sup 1//sup 6//sup 9/,T/sub 1//sub ///sub 2/ = 1.5 hr; Hf/sup 170/, T/sub 1/2/ = 9 hr. (auth)

• Research Organization: Carnegie Inst. of Tech., Pittsburgh
• NSA Number: NSA-15-020192
• OSTI ID: 4057939
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 122; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANTHRACENE
BETA DECAY
BETA SPECTROMETERS
ENERGY RANGE
GAMMA RADIATION
HAFNIUM 168
HAFNIUM 169
HALF-LIFE
IRRADIATION
LUTETIUM 168
LUTETIUM 169
LUTETIUM 170
LUTETIUM OXIDES
MEASURED VALUES
PHYSICS
POSITRONS
PRODUCTION
PROTONS
PULSE ANALYZERS
SCINTILLATION COUNTERS
SODIUM IODIDES
SPECTRA