Half-life of {sup 44}Ti
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California94720 (United States)
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
- National Institute of Standards and Technology, Gaithersburg, Maryland20899 (United States)
We present the results of two separate measurements of the half-life of {sup 44}Ti relative to those of {sup 22}Na and {sup 207}Bi, respectively. By comparing the numbers of 1157-keV {gamma} rays from {sup 44}Ti to those of 1274-keV {gamma} rays from {sup 22}Na observed from a mixed source over a period of approximately 2 yr, we determined the half-life of {sup 44}Ti to be 61.5{plus_minus}1.0yr. From an approximately 1-yr-long study of another mixed source, where we compared the numbers of 1157-keV {gamma} rays from {sup 44}Ti to those of 1064-keV {gamma} rays from {sup 207}Bi, we determined the {sup 44}Ti half-life to be 62{plus_minus}5yr. From these two results, we have obtained a best value of 62{plus_minus}2yr for the half-life of {sup 44}Ti. The astrophysical implications of this result are discussed. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 627572
- Journal Information:
- Physical Review, C, Vol. 57, Issue 4; Other Information: PBD: Apr 1998
- Country of Publication:
- United States
- Language:
- English
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