【摘要】 <正> ⁶¹Cu是一个有用的放射性同位素,它具有合适的半衰期（3.4小时）及便于测量的γ射线能量（0.283、0.373、0.511及 1.185MeV）。关于⁶¹Cu衰变的γ射线谱,不同作者提供的纲图有若干分歧,因此,制取纯⁶¹Cu,进行⁶¹Cu的衰变γ射线谱的测量,建立一个新的能级纲图是一项很有意义的工作。 ⁶¹Cu可以用18MeV左右的α粒子轰击天然镍靶生成,其反应为⁵⁸Ni（α,p）⁶¹Cu及⁵⁸Ni（α,n）⁶¹Zn→（39秒）⁶¹Cu(⁵⁸Ni的天然丰度为68％),主要竞争反应为⁶⁰Ni（α,2n）⁶²Zn(⁶⁰Ni的天然丰度为26％)。⁵⁸Ni（α,p）⁶¹Cu与⁶⁰Ni（α。2n）⁶²Zn反应的激发函数见图 1。可见产生⁶¹Cu的最佳α粒子能量约为18MeV,而我所1.2米回旋加速器的α粒子能量约为30MeV,为此,必须用阻挡法将打到Ni靶上的α粒子能量降到18MeV左右。更多还原

【Abstract】 61Cu produced by alpha particle bombordment of natural nickel target was separated from target and purified with anion exchanger. The method is as follows, 61Cu is adsorpted on strong alkali anion exchanging column from 8N HC1 with a large amount of Ni passing through. 2N HC1 is then used to elute 61Cu from the column. By checking of γ-spectrum and half-life the 61Cu thus formed is proved pure enough for determination of its nuclear parameters. The method can also be applied to prepare medical radioisotope 62Zn from 30MeV aaaaa particle bombarded Ni target. However, 0.05N HC1 is used to elute更多还原