Half-life of {sup 44}Ti

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.57.2010· OSTI ID:627572

Norman, E B; Browne, E; Chan, Y D; Larimer, R; Lesko, K T; Nelson, M; Wietfeldt, F E; Zlimen, I ^[1]; Goldman, I D ^[2]; Wietfeldt, F E ^[3]

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1. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California94720 (United States)
2. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
3. 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, Journal Name: Physical Review, C Journal Issue: 4 Vol. 57; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BISMUTH 207
COSMIC RADIATION
GAMMA RADIATION
HALF-LIFE
METEORITES
NUCLEOSYNTHESIS
RADIOISOTOPES
SODIUM 22
SUPERNOVAE
TITANIUM 44