准经典电子偶素中的Angular momentum不守恒和守恒
Angular momentum nonconservation and conservation in quasiclassical Positronium
摘要：
结果表明，由于托马斯岁差，角动量一般不是一个常数的运动在准经典模型的电子偶素原子组成的圆形轨道点电荷的内禀自旋和相关的磁矩。尽管没有外部施加的扭矩，角动量是一个常数的运动，只有当电子和正电子的固有角动量矢量分量垂直于轨道角动量是反平行的，大小相等。
英文摘要：
It is shown that due to Thomas precession, angular momentum is not generally a constant of the motion in a quasiclassical model of the Positronium atom consisting of circular-orbiting point charges with intrinsic spin and associated magnetic moment. Despite absence of externally-applied torque, angular momentum is a constant of the motion only if the electron and positron intrinsic angular momentum vector components perpendicular to the orbital angular momentum are antiparallel and of equal magnitude.
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