Spectroscopy of the 3p /sup 2/Pi Rydberg state of HCO by resonance-enhanced multiphoton ionization
High resolution two-photon resonant, three-photon ionization spectra of HCO and DCO are presented for wavelengths from 373 to 460 nm. Rotational analysis of the (K',K'') = (0,2) and (0,1) subbands and measurements of spin--rotation splitting on the (0,2) subband provide a definitive assignment of the (070)reverse arrow(000) band of the bent-to-linear 3p /sup 2/Pi(A'')reverse arrowX /sup 2/Pi(A') Rydberg absorption in HCO. Bands from nine vibrational states in HCO and ten in DCO, attributable to a (0n0)reverse arrow(000) bending mode progression in the 3p Rydberg state, are observed and assigned. Additional bands in HCO and DCO are assignable to (0n1)reverse arrow(000) 3p progressions. Values for the 3p /sup 2/Pi fundamentals ..nu../sub 2/ = 822.1(0.7) cm/sup -1/, ..nu../sub 3/ = 2177(3) cm/sup -1/ for HCO and ..nu../sub 2/ = 657(2)= cm/sup -1/, ..nu../sub 3/ = 1900(5) cm/sup -1/ for DCO were measured. Additional unassigned partial progressions are provisionally attributed to 3s /sup 2/summation/sup +/reverse arrowX /sup 2/Pi(A') transitions.
- Research Organization:
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853
- OSTI ID:
- 5596384
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 88:2; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ACETALDEHYDE
ACYL RADICALS
ALDEHYDES
BEAMS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY LEVELS
EXCITED STATES
FORMYL RADICALS
IONIZATION
MOLECULAR BEAMS
MULTI-PHOTON PROCESSES
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
RADICALS
RESONANCE
ROTATIONAL STATES
RYDBERG STATES
SPECTRA