Direct Measurement of 12C+4He → 16O + γ Reaction at Stellar Energy

Preparation for direct measurement of 12C+4He→16O+γ reaction at stellar energy has been made in Kyushu University tandem laboratory (KUTL) since 1914. We plan to measure the reaction at Ecm = 2.4–0.7 MeV where the cross section is estimated to be 60 nbarn–1pbarn. Many instrumental developments have been made for a 12C beam, a windowless helium gas target, 16O detection, background reduction. We started the measurement in 2006.