本工作用α粒子活化分析法测定铜中氧含量,通过化学分离,可测定低于1×10~(-6)g/g的氧含量。这种方法还能消除表面氧沾污的影响。 1.实验 (1) 核反应 α粒子与氧的核反应为:~(16)O(α,d)~(16)F E_(th)=20.4MeV;~(16)O(α,pn)~(18)F E_(th)=23.2MeV;~(16)O(α,2n)~(18)Ne(?)~(18)FE_(th)=29.7MeV。~(18)F是正电子发射体,半衰期为109.7分钟。 α粒子与铜及铜中的杂质神、锑反应产生的放射性同位素为~(61)Cu、~(65)Zn、~(66)Ga、~(68)Ga、~(76)Br、~(77)Br和 In this work, the content of oxygen in copper was determined by alpha particle activation analysis, and the oxygen content of less than 1 × 10 -6 g / g was determined by chemical separation. This method also eliminates the effects of surface oxygen contamination. 1. Experimental (1) Nuclear reaction The reaction between α particles and oxygen is: (16) O (α, d) ~ (16) F E th = 20.4MeV; 18) F E th (th) = 23.2 MeV; (16) O (α, 2n) to (18) Ne (?) To (18) FE th (th) = 29.7 MeV. ~ (18) F is a positron emitter with a half-life of 109.7 minutes. The radioisotopes produced by the reaction between α particles and copper and copper and the antimony and antimony are ~ (61) Cu, ~ 65 Zn, ~ 66 Ga, 68 Ga, ~ 76 Br, 77) Br and