The excitation strength towards the first band develops an oscillating behavior as a function of the momentum transfer,vanishing at even multiples of the Bragg momentum due to the presence of a phononic regime.
最低能带的激发强度与动量转移(transfering momentum)呈现某种周期关系,并且在偶数倍的Bragg动量处为零。
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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。
This article reviews the physics of angular momentum transfer and loss in optical pumping and spin-exchanging collisions.
动量守恒方程包括两种气体(热气体和束电子)的动量转移。
The momentum flux conservation equation includes the momentum transfer of two gases (heating gas and beam electron).
交易员用价格交叉来鉴别动量转移并作为一个基本的进入和退出策略。
Price crossovers are used by traders to identify shifts in momentum and can be used as a basic entry or exit strategy.
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