Vacuum Level
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High Quality Content by WIKIPEDIA articles! In physics, the vacuum level refers to the energy of a free stationary electron that is outside of any material (it is in a perfect vacuum). It may be taken as infinitely far away from a solid or modified to be defined near a surface. Its definition and measurement are often discussed in UPS literature. As the vacuum level is a property of the electron and free space, it is often used as the level of alignment for the energy levels of two different materials. The vacuum level alignment approach may or may not hold due to details of the interface. It…mehr

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High Quality Content by WIKIPEDIA articles! In physics, the vacuum level refers to the energy of a free stationary electron that is outside of any material (it is in a perfect vacuum). It may be taken as infinitely far away from a solid or modified to be defined near a surface. Its definition and measurement are often discussed in UPS literature. As the vacuum level is a property of the electron and free space, it is often used as the level of alignment for the energy levels of two different materials. The vacuum level alignment approach may or may not hold due to details of the interface. It is particularly important in the design of vacuum device components such as cathodes.