free electron

基本解释

This represents the free electron.
这就是自由电子。
It is a free electron so there is no potential energy to be accounted for.
对于自由电子,因此没有什么势能。
But we see if we have a free electron, as we do in this dotted line here, that's going to be a higher energy that's less stable.
但是我们看到如果,我们有一个自由电子，就像虚线所示那样，那将会是一个较高的,不够稳定的能量。

This should make sense, because if an atom has a very high electron affinity, that means it's really happy taking an electron from another atom, or taking a free electron -- that that's very favorable.
这应该是合理的，因为如果一个原子有很高的电子亲和能，这意味着,它非常乐意从另外一个原子那里夺取一个电子，或者得到一个自由电子--这是非常利于发生的。
麻省理工公开课 - 化学原理课程节选
But we see if we have a free electron, as we do in this dotted line here, that's going to be a higher energy that's less stable.
但是我们看到如果,我们有一个自由电子，就像虚线所示那样，那将会是一个较高的,不够稳定的能量。
麻省理工公开课 - 化学原理课程节选
It is a free electron so there is no potential energy to be accounted for.
对于自由电子,因此没有什么势能。
麻省理工公开课 - 固态化学导论课程节选

The high average power infrared Free Electron Laser (FEL) provides intense beams of laser light that can be tuned to atmosphere-penetrating wavelengths.
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any electron that is not attached to an ion, atom, or molecule and is free to move under the influence of an applied electric or magnetic field