Determination of sidefeeding intensity by γ-γ coincidence data analysis

A method has been developed to determine sidefeeding intensities of residual nuclei produced in heavy ion fusion reactions by means of the analysis of γ-γ coincidence data. In order to take into account the angular correlation effects, the calculations based on the directional correlation from oriented states (DCO) are employed to acquire the angular correlation functions by fitting the experimental DCO ratios from the γ-γ coincidence data. A typical example is given for the determination of sidefeeding intensities of 53Mn which is produced in the 30Si(28Si,αp)53Mn reaction channel with a low cross section and many other open channels. This method is found to be not only very successful but also necessary for cases where disturbing outgoing channels, contaminations and background problems make the single γ-spectrum rather complex. (orig.)