Penning Ionisation Electron Spectroscopy

Aaonyms PIES (Penning ionisation electron spectroscopy) 

A low energy beam of metastable excited gas atoms is directed at the sample. The interaction with the surface de-excites the atoms and ejects an electron from the surface. This electron is collected by an electron energy analyser to reveal information about the surface electronic structure and bonding geometry. 

Such spectra are representative of, although not identical to, the sample s valence band electronic density of states. 

Vacuum compatible solids. PIES is particularly useful for studying molecular adsorbate overlayer geometry on metallic single crystals. 

PIES reveals information about the valence band electronic density of states of the topmost atomic layer. It also reveals information about the molecular orientation of this layer. 

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INS is very similar to MIES (metastable impact electron spectroscopy) or PIES (penning ionisation electron spectroscopy) except that in INS ions are used instead of metastable atoms. 

Penning ionisation electron spectroscopy (PIES) help the assignment... 

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