95 Zr(n,γ) 96 Zr的间接测量

95Zr（n，γ）96Zr是稳定燃烧的恒星中合成96Zr的唯一途径，对研究恒星演化和重元素合成具有重要的意义。由于95Zr半衰期为64 d，直接测量95Zr（n，γ）96Zr截面极为困难，因此，本工作采用替代比率法间接测量95Zr（n，γ）96Zr截面。本工作测量了94Zr（18O，16Oγ）96Zr和90Zr（18O，16Oγ）92Zr反应，得到了复合核96Zr*和90Zr*衰变到γ道的几率比，并利用截面已知的91Zr（n，γ）92Zr截面乘以实验所测比率，得到了En=0~8 MeV能区的95Zr（n，γ）96Zr中子俘获截面。 95Zr(n, γ)96Zr cross section is important for the study of stellar evolution and heavy elements nucleosynthesis because the reaction is the only way to produce the 96Zr in Asymptotic giant branch stars. The direct measurement of 95Zr(n, γ)96Zr is very difficult due to the short half-life of 95Zr, 64 days. The surrogate ratio method was carried out to measure 95Zr(n, γ)96Zr cross sections. We measured the 94Zr(18O, 16Oγ)96Zr and 90Zr(18O, 16Oγ)92Zr reactions and obtained the γ-decay probability ratio of compound nuclei 96Zr* and 92Zr*. The 95Zr(n, γ)96Zr cross section is determined by the obtained ratio multiplying the known 91Zr(n, γ)92Zr cross section at En=0~8 MeV.