Infrared photodissociation of Ar sub 2 sup +
- Univ. of Sussex, Brighton (England)
A supersonic nozzle has been used to generate Ar{sub 2}{sup +} in the ion source of a mass spectrometer via the electron impact ionization of neutral dimers and clusters. Following mass selection, the dimer ion has been photodissociated with infrared radiation from a CO{sub 2} laser in a crossed-beam configuration. By changing the plane of polarization of the laser radiation, two electronic transitions have been identified. One transition corresponds to excitation to a repulsive state, a process that has been established from previous photodissociation studies using visible radiation. It is proposed that the second transition is associated with excitation to quasibound levels in a shallow ion-induced-dipole well, situated in the long-range region of an otherwise repulsive electronic state.
- OSTI ID:
- 7157005
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:14; ISSN 0022-3654; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400000* -- Chemistry
400500 -- Photochemistry
ARGON
CHEMISTRY
DATA
DATA ANALYSIS
DISSOCIATION
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INFRARED RADIATION
LASERS
MEASURING INSTRUMENTS
MEASURING METHODS
NONMETALS
NUMERICAL DATA
PHOTOCHEMISTRY
RADIATIONS
RARE GASES