P. Siozos, S. Kaziannis, C. Kosmidis
May 15, 2005
Citations
0
Influential Citations
3
Citations
Journal
International Journal of Mass Spectrometry
Abstract
Abstract The interaction of 1-, 2-iodopropane, 1-, 2-iodobutane and 1-iodopentane with strong (2 × 10 15 W cm −2 ) picosecond laser fields at 1064, 532, 355 and 266 nm is studied by means of time-of-flight (TOF) mass spectrometry. The experimental findings are compared with those reported, for the same molecules, from fs experiments at similar laser intensities. The pertaining molecular ionization mechanism (multiphoton and/or field ionization) is found to depend on the laser wavelength, while the recorded multiply charged atomic ions are generated via field ionization processes in all cases. The identification of these ionization mechanisms has been based on the dependence of the signal intensity and the peak profiles on laser polarization. The recorded mass spectra are analyzed vis-a-vis those reported for methyl iodide. The observed similarities and differences are discussed in detail.