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Author Guyon, P. M. ♦ Golovin, A. V. ♦ Quayle, C. J. ♦ Vervloet, M. ♦ Richard-Viard, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ OXYGEN ♦ PHOTOIONIZATION ♦ ALIGNMENT ♦ ANISOTROPY ♦ COINCIDENCE METHODS ♦ DISSOCIATION ♦ EMISSION ♦ EV RANGE 10-100 ♦ EXCITED STATES ♦ PHOTOELECTRON SPECTROSCOPY ♦ TIME-OF-FLIGHT SPECTROMETERS
Abstract Photoelectron photoion coincidence and threshold photoelectron photoion coincidence time of flight spectra for O{sub 2} molecules in the 22.20{endash}22.36 eV region have been measured to investigate anisotropy in dissociative photoionization processes. Some of the O{sup +} ions were produced in a particular photodissociation process in which the molecule fragments into an O({sup 3}{ital P}) atom and an excited O{sup {asterisk}}[{sup 2}{ital P}{sup {ital o}}3{ital d}{double_prime}] atom, which autoionizes to produce O{sup +}({sup 2}{ital D}{sup {ital o}})+{ital e}{sup {minus}}(0.16 eV). The O{sup +} spectra present a nonisotropic profile which is interpreted as the result of a photodissociation process producing aligned O{sup {asterisk}} atoms followed by ejection of an electron along the axis of the dissociating molecule. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-01-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 76
Issue Number 4


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