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~(123)I为一种优质核素、具有较~(131)I更为合适的半衰期(13.2小时),无β粒子发射,γ能量适中(159keV),近十年来已在诊疗中取代了~(131)I。~(123)I制备法有直接和间接两种,前者以粒子轰击靶子制得。如~(121)Sb(α、2n)~(123)I,~(122)Te(d、n)~(123)I,~(123)Te(P、n)~(123)I等等。间接法则由粒子束轰击靶子物先制得~(121)Xe(T_(1/2)2.1小时),再经β~+衰变制~(123)I。本所采用α粒子束轰击超纯锑靶,直接制取~(123)I、在核素制备过程中,锑靶纯度直接影响~(123)I的性质,有必要对锑靶痕量元素分析。我们采用ICP光谱法分析了电镀锑靶片,满足了制备的要求。
~ (123) I is a high quality nuclide with a more suitable half-life (13.2 hours) than 131I, no beta particle emission, and moderate γ energy (159 keV), which has been replaced by medical treatment over the past decade ~ (131) I. ~ (123) I preparation method has two kinds of direct and indirect, the former particle bombardment target. Such as ~ (121) Sb (α, 2n) ~ (123) I, ~ (122) Te (d, n) ~ 123 I, ~ 123 123Ti (P, n) ~ 123 . In the indirect method, ~ (121) Xe (T 1/2 (2.1) hours) was produced by bombardment of the target with particle beam and then decayed to ~ (123) I by β ~ + decay. In this paper, we use the α-particle beam to bombard the ultra-pure antimony target and directly produce ~ (123) I. During the preparation of the nuclide, the antimony target purity directly affects the properties of ~ (123) I. . We analyzed the electroplated antimony target by ICP spectrometry to meet the preparation requirements.