Velocity map ion imaging of H atoms from the dissociation of HCO ( A ∼ 2 A ″ ) using Doppler-free multi-photon ionization

• Published in: Chemical physics letters Vol. 414; no. 4; pp. 473 - 478
• Main Authors: Riedel, J., Dziarzhytski, S., Kuczmann, A., Renth, F., Temps, F.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 14.10.2005
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2005.08.115

Velocity map ion imaging using Doppler-free 2+1 multi-photon ionization at λ = 243.1 nm has been applied to monitor the nascent H atoms from the predissociation of HCO ( A ∼ 2 A ″ ) in the (0, 0, 10 1) vibrational state. Employing two balanced, counterpropagating circularly (σ + and σ −) polarized probe beams, complete velocity map images were accumulated with every laser shot without having to scan the probe wavelength over the strongly Doppler-broadened line profile. The H–CO bond dissociation energy, CO internal energy distribution, and anisotropy parameter are presented and compared with literature data.