The 44Ti(α, p) reaction and its implication on the 44Ti yield in supernovae

A. A. Sonzogni, K. E. Rehm, I. Ahmad, F. Borasi, D. L. Bowers, F. Brumwell, J. Caggiano, C. N. Davids, J. P. Greene, B. Harss, A. Heinz, D. Henderson, R. V.F. Janssens, C. L. Jiang, G. McMichael, J. Nolen, R. C. Pardo, M. Paul, J. P. Schiffer, R. E. SegelD. Seweryniak, R. H. Siemssen, J. W. Truran, J. Uusitalo, I. Wiedenhöver

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Abstract

Cross sections for the 44Ti(α, p)47V reaction which significantly affects the yield of 44Ti in supernovae were measured in the energy range 5.7MeV ≤ Ec.m. ≤ 9 MeV, using a beam of radioactive 44Ti. The cross sections and the deduced astrophysical reaction rates are larger than the results from theoretical calculations by about a factor of 2. The implications of this increase in the reaction rate for the search of supernovae using space-based gamma detectors are discussed.

Original languageEnglish
Pages (from-to)1651-1654
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number8
DOIs
StatePublished - 2000

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