Photoionisation cross section

Photoionisation cross section in the context of condensed matter physics refers to the probability of a particle (usually a electron) being emitted from its electronic state.

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Cross section in photoemission

The photoemission is a useful experimental method for the determination and the study of the electronic states. Sometimes the small amount of deposited material over a surface has a weak contribution to the photoemission spectra, which makes its identification very difficult. The knowledge of the cross section of a material can help to detect thin layers or 1D nanowires over a substrate. A right choice of the photon energy can enhanced a small amount of material deposited over a surface, otherwise the display of the different spectra won't be possible^[1].