Photodissociation cage effect in van der Waals complexes: Fluorescence spectra of I/sub 2/ B(/sup 3/Pi/sub 0+u/) from the hindered photodissociation of I/sub 2/Ar at 488 nm
The B..-->..X fluorescence from I/sub 2/ produced in the hindered photodissociation of I/sub 2/Ar at 488 nm has been resolved. The spectra show several vibrational progressions with low rotational energy, the most prominent of these is a (v',0) progression extending from v' = 49 to at least v' = 23. The I/sub 2/Ar complexes were excited and the I/sub 2/ fluorescence was observed under collision-free conditions in a supersonic free-jet expansion. We attribute these observation to one-atom photodissociation cage effect in the I/sub 2/Ar comples, in which the molecular iodine, although excited more than 400 cm/sup -1/ above B state dissociation limit, is prevented from dissociating by energy transfer to the argon atom, resulting in the breaking of the van der Waals bond: I/sub 2/Ar..-->..I/sub 2/(B)+Ar, leaving the iodine molecule in a bound level of the B electronic state, 386--1889 cm/sup -1/ below the dissociation limit. (AIP)
- Research Organization:
- University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 5168160
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 77:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of the dynamics and energy disposal in the photodissociation of small ion clusters using a high-energy ion beam crossed with a laser beam: Photodissociation of (NO)/sub 2//sup +//sup. / in the 488--660 nm range
Photodissociation of van der Waals clusters of isoprene with oxygen, C{sub 5}H{sub 8}-O{sub 2}, in the wavelength range 213-277 nm
Related Subjects
ARGON IODIDES
DISSOCIATION
IODINE
FLUORESCENCE
PHOTOLYSIS
ARGON COMPOUNDS
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
IODIDES
IODINE COMPOUNDS
LUMINESCENCE
NONMETALS
PHOTOCHEMICAL REACTIONS
RARE GAS COMPOUNDS
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory