Preferred Label : photoelectron spectroscopy;
Detailed label : photoelectron spectroscopy (PES);
IUPAC acronym : PES; UV; UPS; XPS; ESCA;
IUPAC definition : A spectroscopic technique which measures the kinetic energy of electrons emitted upon
the ionization of a substance by high energy monochromatic photons. A photoelectron
spectrum is a plot of the number of electrons emitted versus their kinetic energy.
The spectrum consists of bands due to transitions from the ground state of an atom
or molecular entity to the ground and excited states of the corresponding radical
cation. Approximate interpretations are usually based on 'Koopmans theorem' and yield
orbital energies. PES and UPS (UV photoelectron spectroscopy) refer to the spectroscopy
using vacuum ultraviolet sources, while ESCA (electron spectroscopy for chemical analysis)
and XPS use X-ray sources.;
Origin ID : P04609;
Automatic exact mappings (from CISMeF team)
- See also
A spectroscopic technique which measures the kinetic energy of electrons emitted upon
the ionization of a substance by high energy monochromatic photons. A photoelectron
spectrum is a plot of the number of electrons emitted versus their kinetic energy.
The spectrum consists of bands due to transitions from the ground state of an atom
or molecular entity to the ground and excited states of the corresponding radical
cation. Approximate interpretations are usually based on 'Koopmans theorem' and yield
orbital energies. PES and UPS (UV photoelectron spectroscopy) refer to the spectroscopy
using vacuum ultraviolet sources, while ESCA (electron spectroscopy for chemical analysis)
and XPS use X-ray sources.
