S Banerjee et al 1999 J. Phys. B: At. Mol. Opt. Phys. 32 L305 doi:10.1088/0953-4075/32/13/104
Spatial effects in the intense field ionization of N2 molecules by femtosecond-duration laser pulses
S Banerjee, G Ravindra Kumar and D Mathur
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Spatially resolved time-of-flight measurements have been made of laser-induced multiple ionization of N2 molecules in intensity-selective fashion using 100 fs long light pulses of 806 nm wavelength, over an intensity range 1013-1015 W cm-2. The spatial dependence of the laser intensity within the laser-molecule interaction zone determines the overall ionization dynamics. Different processes are shown to dominate in different intensity (spatial) regimes, leading to an inhomogeneous distribution of N2+ and Nq+ (q
1) ions and their kinetic energies in the laser focal volume. Implications are discussed for experiments that aim to probe phenomena such as bond softening and above-threshold dissociation.
- PACS
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33.80.Eh Autoionization, photoionization, and photodetachment
33.80.Gj Diffuse spectra; predissociation, photodissociation
- Subjects
- Dates
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Issue 13 (14 July 1999)
Received 17 March 1999, in final form 21 April 1999
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Spatial effects in the intense field ionization of N2 molecules by femtosecond-duration laser pulses
S Banerjee et al 1999 J. Phys. B: At. Mol. Opt. Phys. 32 L305
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