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本文在Coulomb-Volkov近似下,研究了激光场中电子对核的相对论散射.电子出射与入射态分别用Volkov波函数和Coulomb-Volkov波函数来描述.数值计算给出了辐射场修正的散射截面及其对激光强度和频率的依赖关系,并与相应的Born近似结果进行了比较. 相似文献
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作为含时薛定谔方程的微扰近似解,在速度规范下给出了激光场中缀饰原子的一个波函数.利用平均激发能近似和完备关系,可将此波函数简化为一个含时的相乘算符作用于无场时的"裸原子"态上.在软光子近似下,平均激发能仅出现在光场频率的一阶和二阶项上.此波函数适用于计算激光辅助的散射过程,特别是重排过程. A wave function for laser dressed atom is derived as a perturbative solution of the time dependent Schrdinger equation in the velocity gauge. With the use of the average excitation energy approximation and the closure approximation, the solution is reduced to a time dependent operator acting on the "bare" atomic state. In soft photon approximation, the average excitation energy only appears in the first and second order terms of field frequency. Such a simplified dressed wave function is useful in... 相似文献
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本在Coulomb-Volkov近似下,研究了激光场中电子对核的相对论散射。电子出射与入射态分别用Volkov波函数和Coulomb-Volkov波函数来描述。数值计算给出了辐射场修正的散射截面及其对激光强度和频率的依赖关系,并与相应的Born近似结果进行了比较。 相似文献
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在一级玻恩近似和软光子近似下 ,研究了激光场中电子对氢原子基态的自由 自由跃迁,并考虑入射电子对束缚电子的交换效应 .发现Kroll Watson截面求和规则在大角度遭到明显破坏. In the first Born approximation and the soft-photon approximation, the laser-assisted electron-atomic-hydrogen free-free transition is investigated with taking the exchange effect into acount. We find that the Kroll-Watson sum rule is significantly violated in the backward direction. 相似文献
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