A facility for studying radiative capture reactions induced with radioactive beams at ISAC

The measurement of low energy fusion reactions of importance to nuclear astrophysics scenarios are a prime objective of the physics program of the new ISAC facility, located at TRIUMF in Vancouver, Canada, Intense radioactive beams of Ne-19, O-14,O-15, Na-20,Na-21, F-17,F-18 and other low Z species with energies in the range of 0.15 to 1.5 MeV/mass unit will be available to measure cross sections and resonance strengths of alpha and proton induced reactions. An important component of the experimental configuration will be a new Recoil Product Detection Facility (RPDF) consisting of a windowless gas target, surrounded by a gamma array, while the recoils are separated from the intense radioactive beam using a Electro-Magnetic Separator (EMS) employing Wien filters. The recoiling reaction products will then be detected using either a Si mu-strip array or a gas Filled detector. Using these devices along with coincidence requirements and time-of-flight conditions a background reduction factor of the order of 10(+15) is the present goal.