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Two‐Photon Dissociation Spectroscopy of State‐Selected HCl + and DCl + Ions
Author(s) -
Michel Michael,
Weitzel KarlMichael
Publication year - 2004
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200400140
Subject(s) - ion , dissociation (chemistry) , spectroscopy , chemistry , atomic physics , photodissociation , spectral line , analytical chemistry (journal) , photochemistry , physics , organic chemistry , quantum mechanics , chromatography , astronomy
HCl + and DCl + ions were formed via the R(1) pump line of the f 3 Δ 2 ( v ′=0)← 1 ∑ + ( v ′′=0) REMPI process. For these ions, the two‐photon dissociation spectroscopy, resonance‐enhanced via the A 2 ∑ + ( v ′)← 2 Π 3/2 ( v ′′=0) transition, was investigated for various intermediate states of HCl + ( v ′=4,5,6) and DCl + ( v ′=6, 7, 8, 9). From the analysis of the data, spectroscopic parameters of the X and the A states were derived (including the Λ‐doubling in the X state and the spin–rotation coupling in the A state). Some of the parameters deviate considerably from literature data. The spectra provide clear evidence that the REMPI process employed for forming the ions has a very high rotational selectivity.