Laser-induced fluorescence study of spin–orbit quenching of Cl(2P1/2) by H2, D2, and HD gases

Employing ultraviolet laser flash photolysis in combination with pulsed vacuum ultraviolet laser induced-fluorescence spectroscopy room-temperature rate constants k Q,H 2 = (5.8 ± 0.6) × 10−11 cm3 s−1, k Q, D 2 = (5.6 ± 0.6) × 10−12 cm3 s−1, and k Q,HD = (2.7 ± 0.3) × 10−11 cm3 s−1 for electronically non-adiabatic quenching of spin–orbit excited Cl(2P1/2) atoms in collisions with H2, D2, and HD gases were determined, which allow for comparison with results of recent quantum-scattering calculations [14,15].