Development of facilities for direct measurement of the~4He+~(12)C radiative capture reaction of astrophysical interest in Kyushu University

摘要

A recoil mass separator designed to achieve a highest possible capability of the background rejection in the condition of inverse kinematics has been developed at Kyushu University tandem accelerator laboratory. Developments at accelerator have also been carried out to obtain a pulsed beam of high current and good emittance. With the mass separator and the pulsed heavy-ion beam, we have started the measurement of the ~4He(~(12)C,~(16)O)γ reaction of astrophysical interest. The ~(16)O particles from the reaction at E_(c.m.) = 2.4 MeV have successfully been observed. Further developments to realize the unambiguous measurement of the cross sections at E_(c.m.) down to 0.7 MeV are in progress.