Planned experiment on 40Ca(alpha,gamma)44Ti in Dresden

The 40Ca(alpha,gamma)44Ti nuclear reaction is important for the production of 44Ti in the alpha-rich freezeout in supernovae. The decay of 44Ti has been observed in several staellite-based gamma observatories for the Cas A supernova remnant, but surprisingly not in other cases. A new 40Ca(alpha,gamma)44Ti cross section measurement planned in Dresden is briefly described in the talk. The irradiations are to be performed at the FZD 3 MV Tandetron. Besides in-beam gamma-spectrometry and accelerator mass spectrometry, the main detection method will be an activation measurement. The weak activated 44Ti samples will be counted in the Felsenkeller underground low-level counting facility.