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The ionization of molecules near threshold

โœ Scribed by J.N. Bardsley

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
438 KB
Volume
1
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The observed structure in the ionization cross section just above the threshold has been attributed to the formation of auto-ion'zing Rydberg states. The calculation of the auto-ionization rates is discussed in terms of the breakdown rf the Born-Oppenheimer approximation. Three aspects are examined qualitatively, the variation of decay rate with principal quantum number, the magnitude of the decay rate, and the competition between auto-ionization and pre-dissociation. It is found that the states are all narrow.and . that the widths decrease with increasing principal quantum number.

Recent investigations

of the ionization of diatomic molecules by photon and electron impact have revealed considerable structure within the first few eV above threshold.

๐Ÿ“œ SIMILAR VOLUMES

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โœ Richard B. Opsal; James P. Reilly ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 426 KB

Aromatic molecules are multiphoton ionized in the source region of a time-of-flight mass spectrometer using the output from a KS escimer laser. Under certain operating conditions unusnally sharp mass spectral peaks are observed. It is demonstrated that these result from ionization of molecules initi