- #1

- 216

- 8

## Main Question or Discussion Point

Hello.

The collisional frequency is generally expressed by ν = n

I thought collisional frequency must also be replied on density of incident particles but typically expression doesn't have this factor. Let's imagine thermal collision of electrons to other particles. With the same electron temperature and target density, collision frequency should be proportional to the electron density. That is why this is werld for me.

So I guess collision frequency calculated from the formula above is actually collisional frequency per an indicent particle. I'm wondering my interpretation is right.

Please help me to clarify this:)

The collisional frequency is generally expressed by ν = n

_{t}×average of (σv), where n_{t}, σ and v are density of target (atoms or molecules), collisional cross section of target and kinetic velocity of incident particles. σ depends on kinetic energy of incident particlesI thought collisional frequency must also be replied on density of incident particles but typically expression doesn't have this factor. Let's imagine thermal collision of electrons to other particles. With the same electron temperature and target density, collision frequency should be proportional to the electron density. That is why this is werld for me.

So I guess collision frequency calculated from the formula above is actually collisional frequency per an indicent particle. I'm wondering my interpretation is right.

Please help me to clarify this:)