Improved measurement of the {sup 44}Ti half-life from a 14-year long study

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.065803· OSTI ID:20864245

Ahmad, I; Greene, J P; Moore, E F; Ghelberg, S; Ofan, A; Paul, M; Kutschera, W ^[1]

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1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

The half-life of {sup 44}Ti was determined by following the decay of {sup 44}Ti and {sup 60}Co for 14 yr. Mixed sources containing {sup 44}Ti and {sup 60}Co and pure sources of {sup 44}Ti and {sup 60}Co were prepared and their {gamma}-ray spectra were measured with a Ge spectrometer once or twice a year. Counts in the 1157.0-keV {gamma}-ray photopeak of {sup 44}Ti and the 1173.2- and 1332.5-keV {gamma}-ray photopeaks of {sup 60}Co were used for this measurement. From the decay of the {sup 44}Ti and {sup 60}Co activity ratios, the half-life of {sup 44}Ti was determined. Using a value of 5.2711{+-}0.0004 yr for {sup 60}Co half-life, we determined the half-life of {sup 44}Ti as 58.9{+-}0.3 yr. Special efforts were made to check for systematic errors and these were found to be negligible within the quoted uncertainty.

• OSTI ID: 20864245
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevC.74.065803; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COBALT 60
ELECTRON CAPTURE
ENERGY LEVELS
ERRORS
GAMMA RADIATION
GAMMA SPECTRA
GAMMA SPECTROSCOPY
HALF-LIFE
KEV RANGE
LIFETIME
NUCLEAR DECAY
TITANIUM 44