This article reviews the physics of angular momentum transfer and loss in optical pumping and spin-exchanging collisions.

评述了光抽运和自旋交换碰撞中角动量转移和损失的物理。

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Vector nature of angular momentum, precession, conservation of vector angular momentum (its transfer between parts of a system), nutation.

角动量的向量特性，进动，角动量守恒(它在系统内部之间的转移)，章动。

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The transfer of orbital angular momentum during beam transformation was analyzed using beam transforming matrix and Collins integral.

研究了采用扭转柱面镜光学系统将厄米-高斯光束变换成为具有轨道角动量的拉盖尔-高斯扭转对称光束。

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