Photoionization mechanisms for Cr(CO) 6 using high intensity laser pulses in the near-IR

High intensity (i.e. 10 13 W/cm 2) picosecond and femtosecond laser pulses are utilized to study possible photoinization mechanisms of Cr(CO) 6. This work represents the first example of excitation of a metal carbonyl with 800 nm photons where the ionization of intact molecular species dominates pho...

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Bibliographic Details
Published in:Chemical physics letters 1997-03, Vol.267 (3), p.359-364
Main Authors: Willey, K.F., Brummel, C.L., Winograd, N.
Format: Article
Language:English
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Summary:High intensity (i.e. 10 13 W/cm 2) picosecond and femtosecond laser pulses are utilized to study possible photoinization mechanisms of Cr(CO) 6. This work represents the first example of excitation of a metal carbonyl with 800 nm photons where the ionization of intact molecular species dominates photofragmentation channels. With picosecond pulse excitation, however, attenuation of the laser power appears to induce a higher degree of fragmentation. The data can best be interpreted assuming two distinct photoionization mechanisms where MPI dominates at low laser powers and a transition occurs to barrier suppression ionization as the laser power is increased.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(97)00089-4