Competitive production of weakly bound heterodimers in free jet expansions

✍ Scribed by J.R. Grover; E.A. Walters; D.L. Arneberg; C. Santandrea

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 439 KB
• Volume: 146
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)87449-9

✦ Synopsis

The relative density of heterodimers in molecular beams formed from free jet expansions of gas mixtures is measured into the region where trimers and larger clusters dominate, using single-photon dissociative photoionization below the trimer threshold. Calculations based on simple kinetics and pseudoequilibrium models are consistent with the dimer beam intensities at low pressures, but predict intensities at pressures well above the intensity maxima that are far too small. Possible reasons for the continuation of substantial dimer intensities to high nozzle pressures are discussed.