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采用修正的扭曲波玻恩近似(DWBA)方法,本文计算了共面对称几何条件下电子碰撞Mg(3s2) 原子(e,2e)反应的三重微分截面.理论方法通过引入Gamow因子来表示(e,2e)反应的后碰撞相互作用(PCI).将计算结果与实验结果及标准DWBA计算结果进行了比较,发现PCI效应起着重要的作用. 相似文献
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A theory of excitation of ultrasonic waves in the stimulated Brillouin
scattering (SBS) process is presented in this paper. By using several
reasonable approximations, a numerical calculation of the transient
longitudinal SBS shows that large amplitude of acoustic waves can be built
up by the nanosecond pulse of high-power laser, which may result in the
damage of optical glasses. The maximal density change and the maximal
acoustic wave intensity in optical glasses of 5\,cm in thickness are
calculated by using different parameters of the high-energy laser, such as
the intensity, the pulse width, and the wave length. The damage threshold of
the optical glasses is about 80 GW/cm^{2} when using a 1064 nm laser. The
dynamic mechanism of SBS is the electrostriction effect of the components
coupling with the high-power laser. 相似文献
3.
采用修正的扭曲波玻恩近似(DWBA)方法,本文计算了共面对称几何条件下电子碰撞Mg(3s2) 原子(e,2e)反应的三重微分截面. 理论方法通过引入Gamow因子来表示(e,2e)反应的后碰撞相互作用(PCI). 将计算结果与实验结果及标准DWBA计算结果进行了比较,发现PCI效应起着重要的作用. 相似文献
4.
Energy Quantization and Probability Density of Electron in Intense-Field-Atom Interactions
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We find that, due to the quantum correlation between the electron and the field, the electronic energy becomes quantized also, manifesting the particle aspect of light in the electron-light interaction. The probability amplitude of finding electron with a given energy is given by a generalized Bessel function, which can be represented as a coherent superposition of contributions from a few electronic quantum trajectories. This concept is illustrated by comparing the spectral density of the electron with the laser assisted recombination spectrum. 相似文献
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用量子化学从头算方法,计算得到了S3分子优化的几何结构(基态和几个低激发态);研究了其在C2v与Cs群对称性下的解离过程,给出两种群对称性下基态和激发态的势能曲面及等高投影图;在两种群对称性下均得到在相应势能曲面上的优化的解离路径. 相似文献
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