The vacuum ultraviolet laser excitation spectra for free ion-pair (X+ + Y−) formation from jet-cooled I2 and ICl
Literature Information
Kenneth P. Lawley, Alexander C. Flexen, Robert R. J. Maier, Andreas Manck, Trevor Ridley, Robert J. Donovan
The energy difference between the threshold for free ion-pair formation (X+ + Y−) and the molecular ionization energy (XY+) is relatively large in I2 and ICl. Photodissociation to free ion-pairs in this energy region has been probed by vacuum ultraviolet laser radiation generated by four-wave mixing. The negative ion excitation spectra are highly structured and closely follow the one-photon absorption cross-sections. Several Rydberg series are identified, the f series being particularly prominent. Direct absorption to the free ion-pair continuum is negligible in this region and all of the Rydberg states that are accessed act as efficient doorway states to ion-pair production.
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