Primary γ-ray spectra in 44Ti of astrophysical interest

A. C. Larsen, S. Goriely, A. Bürger, M. Guttormsen, A. Görgen, S. Harissopulos, M. Kmiecik, T. Konstantinopoulos, A. Lagoyannis, T. Lönnroth, K. Mazurek, M. Norrby, H. T. Nyhus, G. Perdikakis, A. Schiller, S. Siem, A. Spyrou, N. U.H. Syed, H. K. Toft, G. M. TvetenA. Voinov

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Abstract

Primary γ-ray spectra for a wide excitation-energy range have been extracted for 44Ti from particle-γ coincidence data of the 46Ti(p,tγ)44Ti reaction. These spectra reveal information on the γ-decay pattern of the nucleus and may be used to extract the level density and radiative strength function applying the Oslo method. Models of the level density and radiative strength function are used as input for cross-section calculations of the 40Ca(α,γ)44Ti reaction. Acceptable models should reproduce data on the 40Ca(α,γ)44Ti reaction cross section as well as the measured primary γ-ray spectra. This is only achieved when a coherent normalization of the slope of the level density and radiative strength function is performed. Thus, the overall shape of the experimental primary γ-ray spectra puts a constraint on the input models for the rate calculations.

Original languageEnglish
Article number014320
JournalPhysical Review C - Nuclear Physics
Volume85
Issue number1
DOIs
StatePublished - Jan 23 2012

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