๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

On the Proposal for Femtosecond Parent-ion Mass Spectrometry

โœ Scribed by G. Ravindra Kumar; F. A. Rajgara; D. Mathur

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
305 KB
Volume
10
Category
Article
ISSN
0951-4198

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โœฆ Synopsis

The dissociative ionization (DI) of nitrogen dioxide in intense picosecond laser fields has been studied by measuring mass spectra at different wavelengths: 1064nm, 590nm and 532nm. The DI process is shown to depend on the laser wavelength in a significant way. Comparisons are made with the results of recent studies where it was suggested that laser pulse duration plays a crucial role in the DI of this molecule. In relation to these studies, we show that even for a single pulse duration (and with only one laser), it is possible to effect mass spectrometry of the parent molecular ion.

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We have systematically established the excitation frequency, amplitude, duration, and buffer gas pressure for optimal axialization efficiency and mass selectivity of quadrupolar excitation-collisional cooling for isolation of parent ions for collision-induced dissociation in Fourier transform ion cy