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利用能量为170MeV左右的36Ar重离子束轰击96Ru和106Cd浓缩同位素靶,分别生成缺中子同位素130Nd和140Tb.借助氦喷嘴带传输系统,用 X-γ和 γ-γ符合方法,分离鉴别了这两种核素,并进一步测定了它们的衰变性质.得到130 Nd的半衰期为(13± 3)s,首次建议了它的EC/β+衰变纲图,推测了其子核130Pr的基态和低位能级的自旋宇称.修订了140Tb的原有极简单的EC/β+衰变纲图并指认140Tb的基态自旋宇称为7+.
The 36Ru and 106Cd concentrated isotope targets were bombarded with a 36 Ar heavy ion beam with an energy of about 170 MeV to generate missing neutron isotopes 130Nd and 140Tb, respectively. With helium nozzle band transmission system, X-γ and γ-γ coincidence method was used to separate and identify the two nuclides, and further determine their decay properties. The half-life of 130 Nd was obtained for 13 ± 3 s. For the first time, its EC / β + decay scheme was proposed, and the spin parity of 130Pr at its ground state and lower energy level was deduced. The original simple EC / β + decay scheme of 140Tb was revised and the ground state spin of 140Tb was identified as 7+.