Chin. Phys. Lett.  1995, Vol. 12 Issue (7): 431-434    DOI:
Original Articles |
Isotope Fractionation in the Sputtering of 63Cu-65Cu
ZHENG Liping;CUI Fuzhai*
Institute of Nuclear Research, Academia Sinica, Shanghai 201800 *Department of Materials Science and Engineering, Tsinghua University, Beijing 100084
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ZHENG Liping, CUI Fuzhai 1995 Chin. Phys. Lett. 12 431-434
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Abstract Under 2keV Xe ion bombardment of a 63Cu69.165Cu30.9 isotope mixture, isotope fractionation difference between small and large polar emission angles, δ(15°)-δ(75°), was calculated by use of a dynamic Monte Carlo program. Calculation results show that δ(15°)-δ(75°) is large at both the zero fluence and the high fluence, then it minimizes at a low fluence of 1.6x 1015 ions/cm2 between two fluence limits. An important cause of this minimum is that the surface composition gradient of 63Cu maximiles at the fluence of 1.6x1015 ions /cm2.
Keywords: 79.20.Nc     
Published: 01 July 1995
PACS:  79.20.Nc  
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ZHENG Liping
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