Direct measurement of 12C-4He nuclear fusion cross section at stars

点击翻译按钮获取中文摘要

To simulate evolution of stars, Carbon-Helium nuclear fusion rate at low energy of Ecm=3MeV is essentially important. But measurement of the rate is very difficult, and no one has succeeded in it. In our present study, we developed a windowless Helium gas target of the highest thickness in the world, reduced backgrounds to a level of 10^<-15> lower than Carbon beam particles, and measured Carbon-Helium fusion rate at Ecm=1.5 MeV, the lowest in the world. We also prepared for measurements of the fusion rate down to 0.7 MeV, to estimate the fusion rate at 0.3 MeV by extrapolation.