臨界電圧効果

critical-voltage effect

[目次：理論(電子の散乱／回折／結像)]

入射電子線の加速電圧を上げていくと、ある加速電圧で結晶格子面からの二次の反射強度がゼロになる効果。この効果を利用すると、一次の結晶構造因子が精密に決定できる。

"Critical voltage effect" means that the intensity of the second order reflection from a crystal lattice plane vanishes at a certain accelerating voltage of the incident electron beam when it is increased. The use of the effect enables us to refine (determine) the value of the crystal structure factor of the first order reflection with high accuracy.