【摘要】 本文报道了27keV Ar⁺离子分别轰击Cu元素靶和CuAu合金靶时溅射Cu原子的同位素(⁶³Cu和⁶⁵Cu)分馏测量结果,发现:（1）对Cu元素靶,同位素分馏δ_f(⁶³Cu,⁶⁵Cu)=（62±27）‰,而对Cu-Au合金靶,δ_f=（5.9±1.6）‰;（2）δ_f(⁶³Cu,⁶⁵Cu)随发射角θ的变化对两者靶而言趋势是相似的,但在CuAu合金靶情况下,当θ≤40°时,δ_f(（63）Cu,⁶⁵Cu)为负值。更多还原

【Abstract】 In this paper we report results of isotopic fractionation δf(63Cu, 6SCu) In both elemental Cu and binary alloy Cu0.7Au0.3 during sputtering by Ar+ ion(27keV). The present observations show that larger mass-dependent isotopic fractionation effects accompany the sputtering process: (1) For elemental Cu target, δf(63Cu, 65Cu) = (62±27)‰, for binary alloy Cu0.7Au0. 3 target, δf(63Cu, 65Cu) = (5.9±1.6)‰; (2) Angular distributions of isotopic fractionations δf(63Cu, 65Cu) are similar in both Cu and Cu0.7Au0.3, but we note that for alloy sample(CuAu) the δf(63Cu, 65Cu)<0 at θ (angle of ejection) <45°. These retsults indicate that sputtering produces isotope fractionation and that there is difference in both angular distributions of δf for Cu target and Cu0.7Au0.3 target.更多还原