Книга: Nasir Amin,Yasir Jamil and Muhammad Aslam Baig «Photoionization Cross-sections of Alkali Metals»

Photoionization Cross-sections of Alkali Metals

Производитель: "LAP Lambert Academic Publishing"

Laser photoionization spectroscopy is based on the resonance ionization of atoms and molecules as a result of successive absorption of several laser photons. Photoionization cross sections have number of utilities in the applied areas of science and technology such as space and astrophysics, radiation protections, laser designing and interaction of electromagnetic radiation with matter. The atoms whose ionization potentials are much higher can be ionized by two-photon and multi-step excitation. The absolute photoionization cross sections of the excited states of lithium, sodium and potassium were measured using the saturation technique in conjunction with a thermionic diode ion detector at different ionizing wavelengths above the first ionization threshold. In general it has been found that the measured values of cross sections from the first resonance states to the ionization threshold decreases with the increase of atomic number (Li>Na>K). The smooth frequency dependence of... ISBN:9783659552083

Издательство: "LAP Lambert Academic Publishing" (2014)

ISBN: 9783659552083

См. также в других словарях:

  • radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

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