Abstract
Two-color photoionization of nickelocene molecules cooled in a supersonic jet is performed using a tunable nanosecond pulsed laser. The first stage of the multiphoton excitation is the transition from the highest occupied molecular orbital of nickelocene to the lowest Rydberg level. Conditions are found under which molecular ions (η 5-C5H5)2Ni+ are the only product of the multiphoton ionization in the one-color experiment. Irradiation of an excited molecule by an intense pulse of another laser increases significantly the yield of molecular ions. The dependence of the yield of (η5-C5H5)2Ni+ ions on the frequency of the second laser makes it possible to determine the adiabatic ionization potential of nickelocene as 6.138±0.012eV.
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Translated from Optika i Spektroskopiya, Vol. 97, No. 4, 2004, pp. 605–610.
Original Russian Text Copyright © 2004 by Ketkov, Selzle, Schlag, Titova, Kalakutskaya.
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Ketkov, S.Y., Selzle, H.L., Schlag, E.W. et al. Two-color resonance photoionization spectrum of nickelocene in a supersonic jet. Opt. Spectrosc. 97, 567–571 (2004). https://doi.org/10.1134/1.1813698
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DOI: https://doi.org/10.1134/1.1813698