Stepwise photoionization of 1,2- dimethoxybenzene vapor

Autor:	V. I. Kleimenov, M. E. Akopyan, A. G. Feofilov, M. V. Kleimenov
Rok vydání:	2000
Předmět:	Absorption spectroscopy Chemistry Ionization Analytical chemistry Thermal ionization Photoionization Physical and Theoretical Chemistry Spectroscopy Electron ionization Ion source Atmospheric-pressure laser ionization
Zdroj:	High Energy Chemistry. 34:315-319
ISSN:	1608-3148 0018-1439
DOI:	10.1007/bf02762685
Popis:	Processes of stepwise ionization of 1,2-dimethoxybenzene vapor by radiation in the range 295-275 nm were studied by the techniques of total current spectroscopy, mass spectrometry, electronic absorption spectroscopy, and threshold electron spectroscopy. A two-step ionization process via the first electronically excited state of the molecule yielding the molecular ion was found to prevail at an average laser radiation intensity less than 106 W/cm2. Molecular ions possess a considerable (up to 1 eV) vibrational excitation energy. As the radiation intensity increases, the progressively stronger and deeper degradation takes place via dissociation of molecular and, probably, fragment ions due to absorption of at least one additional photon.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4610b4c2f996b39109927fa76e4cee34 https://doi.org/10.1007/bf02762685 Zobrazit plný text záznamu Full text from SpringerLink