Zhenxia Wang, Zhenlan Tao, Liping Zheng, et al. Studies on the fractionation of Cu isotopes by 27 keV Ar+ sputtering for Cu and CuAu alloy[J]. Nuclear techniques, 1987, 10(9): 5-7,60.
Zhenxia Wang, Zhenlan Tao, Liping Zheng, et al. Studies on the fractionation of Cu isotopes by 27 keV Ar+ sputtering for Cu and CuAu alloy[J]. Nuclear techniques, 1987, 10(9): 5-7,60.DOI:
In this paper we report results of isotopic fractionation
δ
i
(
63
Cu
65
Cu) in both elemental Cu and binary alloy Cu
0
.
7
Au
0
.
3
during sputtering by Art ion (27keV). The present observations show that larger mass-dependent isotopic fractionation effects accompany the sputtering process: (1) For elemental Cu target
δ
i
(
63
Cu
65
Cu)= (62 ± 27)‰
for binary alloy Cu
0.7
Au
0
.
3
target
δ
i
(
63
Cu
65
Cu)= (5.9±1.6)‰; (2) Angular distributions of isotopic fractionations
δ
i
(
63
Cu
65
Cu) are similar in both Cu and Cu
0
.
7
Au
0
.
3
but we note that for alloy sample (CuAu) the
δ
i
(
63
Cu
65
Cu)
<
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
δ
f
for Cu target and Cu
0.7
Au
0.3
target.
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references
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