[Wien] A question about EELS

[Shu Miao]

The Y axis in emperimental spetra is intensity, i.e., the number of
signals per channel on the detector. In the featureless region, the
intensity in a spectrum is the atomic cross-section. However, in the area
with ionization peaks, the intensity is the atomic cross-section
multiplied by the number of holes in the final states in a transition
which is allowed by the selection rule. So I think it is more precise to
say the Y axis represents the probility, which is affected by a few
factors, of a scattering event with a specific energy loss.

Regards,
Shu Miao

On Mon, 16 Apr 2007, [gb2312] ²¨ ¿µ wrote:

> Dear wien users,
>
>         Recently, I used the telnes2 to calculate the electron energy loss spectrum of GaN, I think the column (y axis) of  the spectrum from  case.broadspec means differential cross section, but  recently , someone tell me the meaning of the column is intensity , I don't konw who is right? And is there any difference between intensity and differential cross section?
>
>       Any reply will be appreciated !
>
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