Study of Stellar Reactions in Explosive Hydrogen Burning with CRIB

With using low-energy RI beams from an in-flight RIB separator, CRIB, the most crucial stellar reaction 14O(α,p)17F for the onset of the high-temperature rp-process was directly investigated and the transitions through the states at around 6.2 MeV in 18Ne were first observed, confirming the importance predicted before. The (α,p) reaction leading to the first excited state in 17F was also found to have a large contribution. A proton resonance search experiment of 23Mg + p was also discussed, which is a part of our series of resonance search studies relevant to the early stage of the rp-process