Anisotropy of the Threshold Energy for Production of Frenkel Pairs in Copper and Platinum
Anisotropy of the Threshold Energy for Production of Frenkel Pairs in Copper and Platinum
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铜和铂中产生弗兰克尔对的阈值能量的各向异性
DOI：
10.1103/physrevb.8.553
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发表时间：
1973
影响因子：
3.7
通讯作者：
P. Wombacher
中科院分区：
文献类型：
--
作者：
P. Jung;R. L. Chaplin;H. Fenzl;K. Reichelt;P. Wombacher
薄铜和铂单晶箔已在液氦温度下用能量在 1 至 3 MeV 之间的电子进行辐照。根据电阻率测量，通过改变箔片相对于辐射电子束方向的方向，可以高精度地确定损坏率的方向依赖性。根据缺陷产生对电子能量和箔取向的依赖性，可以确定阈值位移能量的角度依赖性。在两种 fcc 金属中，最密堆积方向 $<100>$ 和 $<100>$ 具有环形区域，铜的最小阈值低至 19 eV，铂的最小阈值低至 33 eV，而最大阈值在 $<111>$ 方向附近达到。对于每单位浓度的法兰克尔对的电阻率，我们得到 (1.7 \ifmmode\pm\else\textpm\fi{} 0.3) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}4}$ \ensuremath{\mu}\ensuremath{\Omega} cm（铜）和 (9.5 \ifmmode\pm\else\textpm\fi{} 0.5) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}4}$ \ensuremath{\mu}\ensuremath{\Omega} cm 为铂金。对于铜，可以与其他理论和实验工作进行比较，并显示出令人满意的一致性。
Thin copper and platinum single-crystal foils have been irradiated at liquid-helium temperature with electrons of energies between 1 and 3 MeV. From resistivity measurements the directional dependence of the damage rate was determined with high accuracy by varying the orientation of the foils relative to the direction of the beam of the irradiation electrons. From the dependence of defect production on electron energy and foil orientation, the angular dependence of the threshold displacement energy could be determined. In both fcc metals, the closest-packed directions $〈100〉$ and $〈100〉$ possess ring-shaped regions which show minimum threshold values down to 19 eV for copper and 33 eV for platinum, while maximum threshold values are attained near the $〈111〉$ direction. For the electrical resistivity per unit concentration of Frenkel pairs, we obtained (1.7 \ifmmode\pm\else\textpm\fi{} 0.3) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}4}$ \ensuremath{\mu}\ensuremath{\Omega} cm for copper and (9.5 \ifmmode\pm\else\textpm\fi{} 0.5) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}4}$ \ensuremath{\mu}\ensuremath{\Omega} cm for platinum. For copper a comparison with other theoretical and experimental works is possible and shows satisfactory accordance.