The SuN Tape transport for Active Nuclei: SuNTAN

Abstract:  The SuN Tape system of Active Nuclei (SuNTAN) has been developed at the NSCL to be integrated with the Summing Na(I) (SuN) detector for sensitive gamma spectroscopy with radioactive beams. SuNTAN consists of a movable metallic tape and a beta-sensitive scintillator detector. Low-energy beams from the NSCL gas stopping area can be very pure, thus, a majority of the detected beta-decays will be from the implanted ions. However, the daughter nuclei in the decay chain present an unwanted, often significant, source of radiation. Spectroscopy on the implanted ions requires these daughter products either be accounted for, or reduced. SuNTAN is able to remove daughter and granddaughter activities, decreasing detection of these contaminants. Measurements with SuN and SuNTAN will be used for total absorption spectroscopy (TAS), a powerful technique used to find beta-decay intensities, and used with the beta-Oslo method to constrain neutron-capture reactions. This talk will present first results from the commissioning experiment of SuNTAN and plans for future experiments.