The theoretical and experimental distinguishing of photoassociation into the XeCl(B) state

✍ Scribed by E.B. Gordon; V.G. Egorov; S.E. Nalivaiko; V.S. Pavlenko; O.S. Rzhevsky

• Book ID: 103035443
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 608 KB
• Volume: 242
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00721-f

✦ Synopsis

The spectrum of excitation into the XeCI(B) state is simulated by a procedure rigorously taking into account the bound-bound (bb) and free-bound (fb) transition contributions. The cross-sections for bb-absorption and photoassociation are calculated, and at their maxima, near h = 308 nm, they amount to 1.2 x 10 -16 cm 2 and 1.4 X 10 -38 cm 5, respectively. An experimental approach is developed enabling the distinguishing of fb-transition contributions by monitoring the excitation into the XeCI(B) state in conditions when the equilibrium between nonexcited XeCI(X) molecules and free Xe and C1 atoms does not have time to be completed. The experimentally obtained ratio of intensities for the bb-and fb-transitions, amounting to 1.8-3.3, is in good agreement with the calculations. These experiments enabled estimation of the rate constant for XeCI(X) state dissociation in bimolecular collisions with Xe atoms as being (3-6) x 10-11 cm 3 s-1.