Photoelectron Spectroscopy

(redirected from Photoemission spectroscopy)
Also found in: Dictionary, Acronyms, Wikipedia.
Related to Photoemission spectroscopy: ultraviolet photoemission spectroscopy

photoelectron spectroscopy

[¦fōd·ō·i′lek‚trän spek′träs·kə·pē]
The branch of electron spectroscopy concerned with the energy analysis of photoelectrons ejected from a substance as the direct result of bombardment by ultraviolet radiation or x-radiation.

Photoelectron Spectroscopy


a method of studying the structure of a substance by measuring the energy spectra of electrons ejected during photoemission. According to the Einstein photoelectric law, the sum of the binding energy or work function of an ejected electron and the kinetic energy of the electron is equal to the energy hv of an incident photon, where h is Planck’s constant and v is the frequency of the incident radiation. The binding energy and the energy levels of the electrons in a substance that is being studied may be determined from the substance’s electron spectrum.

Photoelectron spectroscopy employs monochromatic X- or ultraviolet radiation with photon energies ranging from tens of thousand to tens of electron volts, which correspond to radiation wavelengths in the range from tenths of an angstrom to hundreds of angstroms. A photoelectron spectrum is analyzed by means of high-resolution electron spectrometers; the resolution may be as high as tenths of an electron volt in the X-ray region and as high as hundredths of an electron volt in the ultraviolet region.

The technique of photoelectron spectroscopy is applied to substances in the gaseous, liquid, or solid state and makes it possible to study both the outer and the inner electron shells of atoms and molecules as well as the electron energy levels in a solid, particularly the electron distribution in the conduction band. For molecules, the binding energies of the inner-shell, or core, electrons of the constituent atoms depend on the type of bond or on the chemical shift. Therefore, photoelectron spectroscopy is used in analytical chemistry to determine the composition of substances and in physical chemistry to study chemical bonds. In chemistry, the technique of photoelectron spectroscopy is known as electron spectroscopy for chemical analysis, or ESCA.


Vilesov, F. I., B. L. Kurbatov, and A. N. Terenin. Dokl. AN SSSR, 1961, vol. 138, pp. 1329–32.
Elektronnaia spektroskopiia. Moscow, 1971. (Translated from English.)


References in periodicals archive ?
Supply and installation of X-ray photoemission spectroscopy system (XPS) with a lateral resolution in the micrometer range.
The School of Physics and Astronomy requires a high-resolution, low-temperature ultra-high vacuum (UHV) spin- and angle-resolved photoemission spectroscopy (SARPES) system.
OTCBB: CEXI), a technology development Company providing applications in its patented Enhanced Photoemission Spectroscopy technologies, announced today the appointment of Dale T.
Contract Notice: The School of Physics and Astronomy requires a high-resolution, low-temperature ultra-high vacuum (UHV) spin- and angle-resolved photoemission spectroscopy (SARPES) system.
The ValiMed Medication Validation System uses Enhanced Photoemission Spectroscopy to quickly validate high-risk medication admixtures such as returned narcotics to provide an increased level of patient safety.
CDEX is a technology development company currently manufacturing and globally distributing advanced chemical detection products based on its patented Enhanced Photoemission Spectroscopy technology.
OTCBB:CEXI): An article published in the August issue of the Association of Perioperative Registered Nurses (AORN) Journal documents the benefits of CDEX's Enhanced Photoemission Spectroscopy Technology in reducing narcotics diversion in the healthcare community.