Primary γ-ray spectra in 44Ti of astrophysical interest

Primary gamma-ray spectra for a wide excitation-energy range have been extracted for Ti-44 from particle-gamma coincidence data of the Ti-46(p, t gamma)Ti-44 reaction. These spectra reveal information on the gamma-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 Ca-40(alpha,gamma)Ti-44 reaction. Acceptable models should reproduce data on the Ca-40(alpha,gamma)Ti-44 reaction cross section as well as the measured primary gamma-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 gamma-ray spectra puts a constraint on the input models for the rate calculations.