The dynamic Monte Carlo program including a bombardment-induced Gibb-sian segregation process was used to^calculate angular distributions of individual elements from 3putlcrcd Cuq^PIq^alloy in the Ar ion energy range ...The dynamic Monte Carlo program including a bombardment-induced Gibb-sian segregation process was used to^calculate angular distributions of individual elements from 3putlcrcd Cuq^PIq^alloy in the Ar ion energy range between 0.2 and 1.5ke V.Calculated results show that for each investigated incident energy,the angular distribution of the Pt element is more forward-pointed than that of the Cu one;the reason may be that different percentage of sputtered atoms(37-45% of Pt and 12-19% of Cu)come from beneath the topmost layer.展开更多
The modified dynamic TCIS(Transport and atomic Collision cascade of energetic Ions an Solids)Monte Carlo program including the radiation-enhanced Gibbsian segregation(REGS)is employed to estimate the compositional dis...The modified dynamic TCIS(Transport and atomic Collision cascade of energetic Ions an Solids)Monte Carlo program including the radiation-enhanced Gibbsian segregation(REGS)is employed to estimate the compositional distributions at surface of the Au_(0.56)Cu_(0.44) alloy under 2keV Ar^(+) ion bombardment at high dose.The calculation results exhibit that the Au composition enriches in the first layer(74 at.%),depletes in the second layer(37 at.%)and gradually rises with depth to the bulk composition.The effect of the relation between sputter depth and segregation layer on the surface concentration of Au_(0.56)Cu_(0.44) is also discussed.展开更多
Dynamic Monte Carlo simulation is used to explore the B isotope sputtering during 1 keV Kr ion irradiation.It is found that at both zero and high fluences the light isotope is preferentially ejected in the near-normal...Dynamic Monte Carlo simulation is used to explore the B isotope sputtering during 1 keV Kr ion irradiation.It is found that at both zero and high fluences the light isotope is preferentially ejected in the near-normal direction;meanwhile,there is a low fluence(1.4×10^(15) ions/cm^(2)),at which the isotope fractionation is independent of the emission angle in the nearly whole angular range.展开更多
文摘The dynamic Monte Carlo program including a bombardment-induced Gibb-sian segregation process was used to^calculate angular distributions of individual elements from 3putlcrcd Cuq^PIq^alloy in the Ar ion energy range between 0.2 and 1.5ke V.Calculated results show that for each investigated incident energy,the angular distribution of the Pt element is more forward-pointed than that of the Cu one;the reason may be that different percentage of sputtered atoms(37-45% of Pt and 12-19% of Cu)come from beneath the topmost layer.
文摘The modified dynamic TCIS(Transport and atomic Collision cascade of energetic Ions an Solids)Monte Carlo program including the radiation-enhanced Gibbsian segregation(REGS)is employed to estimate the compositional distributions at surface of the Au_(0.56)Cu_(0.44) alloy under 2keV Ar^(+) ion bombardment at high dose.The calculation results exhibit that the Au composition enriches in the first layer(74 at.%),depletes in the second layer(37 at.%)and gradually rises with depth to the bulk composition.The effect of the relation between sputter depth and segregation layer on the surface concentration of Au_(0.56)Cu_(0.44) is also discussed.
文摘Dynamic Monte Carlo simulation is used to explore the B isotope sputtering during 1 keV Kr ion irradiation.It is found that at both zero and high fluences the light isotope is preferentially ejected in the near-normal direction;meanwhile,there is a low fluence(1.4×10^(15) ions/cm^(2)),at which the isotope fractionation is independent of the emission angle in the nearly whole angular range.