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低速40Ar17+离子入射金属Be表面发射的近红外光谱线和X射线谱

Infrared Light and Xray Emissions of 40Ar17+ Impacting on Be Surface

    摘要
  • 摘要: 用速度不同的（动能EK= 272和357 keV, 速度v=1.14×106和1.72×106 m/s）的高电荷态离子40Ar17+分别入射金属Be表面， 同时测量这种相互作用过程中产生的近红外光谱线和X射线谱。实验结果表明, 在低速范围内（速度小于玻尔速度vBohr=2.19×106 m/s）， 速度较小的40Ar17+离子在到达金属的表面临界距离Rc到进入表面（2—3原子层）的进程中， 形成了较多的高激发态Ar原子， 其退激辐射较强的光谱线， 进而验证了经典过垒模型。
    The highly charged ion 40Ar17+ (kinetic energy EK=272 keV, velocity v=1.14×106 m/s and EK=357 keV, v=1.72×106 m/s) impacts on the surface of metal Be, and the atomic infrared light line and Xray spectrum are simultaneously measured. The experimental results show that in the low velocity region (less than vBohr), the highly charged ion with smaller velocity from a critical distance Rc to penetrate into the bulk formed more multipleexcited Ar atoms and the spectrum intensities of decay radiation are greater, which verifies the classical over the barrier model.

     

    Abstract: The highly charged ion 40Ar17+ (kinetic energy EK=272 keV, velocity v=1.14×106 m/s and EK=357 keV, v=1.72×106 m/s) impacts on the surface of metal Be, and the atomic infrared light line and Xray spectrum are simultaneously measured. The experimental results show that in the low velocity region (less than vBohr), the highly charged ion with smaller velocity from a critical distance Rc to penetrate into the bulk formed more multipleexcited Ar atoms and the spectrum intensities of decay radiation are greater, which verifies the classical over the barrier model.

     

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