用 60 Me V/u18O离子轰击 2 32 Th靶产生 Ba放射性同位素 ;通过 Ba Cl2 沉淀使 Ba从大量钍靶材料和复杂反应产物混合物中分离并被纯化 ;用 13 3Ba做示踪剂确定 Ba的化学产额 ;通过离线 γ谱测量Ba样品 ;根据每个 Ba同位素的γ射线峰的强度以及相关的核数据计算它们的生成截面。结果显示在中能和厚靶的情况下 ,缺中子 Ba同位素仍有较高的生成截面 Ba radioisotopes were produced by bombarding 2 32 Th targets with 60 Me V / u 18 O ions; Ba was separated from bulk thorium target materials and complex reaction product mixtures by Ba Cl 2 precipitation and purified; and 13 3Ba as a tracer to determine Ba chemistry Yield; Ba samples were measured by off-line gamma spectrometry; their cross-section was calculated from the intensity of the gamma ray peak for each Ba isotope and the associated nuclear data. The results show that in the case of medium energy and thick targets, the neutron Ba isotopes still have a higher generation cross section