光电效应是光电吸收截面指数（PEF）测井的测量原理，PEF测井用来划分岩性。
The photoelectric effect is the principle behind the PEF log, which identifies lithology.
本文还指出不同光子能量区域C60的光电离截面振荡有不同的原因。
The present work also implies the photoionization cross-section oscillations of C60 have different origins for different photon energy regions.
用二阶微拢论计算这一截面，结果表示为核矩阵元和激光电场强度的函数。
The cross sections for such processes are calculated in second order perturbation theory and expressed in term of the intensity of laser radiation and the nuclearmatrix elements.
应用推荐