Coincident observation of the photoelectron and its subsequent Auger electron

3 Coincident observation of the photoelectron and its subsequent Auger electron 

For electron-electron coincidence measurements both spectrometer functions have to be taken into account, giving as the response function for selected pass 

As can be seen in Fig. 10.6(b), the Auger line fA analysed with respect to its n constituents, i.e., A( kin2 = n), is equal to the distribution function Lr(Ef — n), except for a magnification which results from the accumulation of photoionization processes within the full bandpass function. 

Having established the Auger line, one can concentrate now on the photoline described by the function fP, which is similarly analysed for selected Ee or kin2 constituents, i.e., 

In order to elucidate the foregoing discussions further, two-step double photoionization will be treated more quantitatively. The coincidence counting rate J(Epassl Epass2) at adapted pass energies of the spectrometers is given by 

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