منابع مشابه
Multiphoton detachment of electrons from negative ions
A simple analytical solution for the problem of multiphoton detachment from negative ions by a linearly polarized laser field is found. It is valid in the wide range of intensities and frequencies of the field, from the perturbation theory to the tunneling regime, and is applicable to the excess-photon as well as nearthreshold detachment. Practically, the formulae are valid when the number of p...
متن کاملElectron Detachment Dissociation and Infrared Multiphoton Dissociation of Heparin Tetrasaccharides.
Heparin glycosaminoglycans (GAGs) present the most difficult glycoform for analytical characterization due to high levels of sulfation and structural heterogeneity. Recent contamination of the clinical heparin supply and subsequent fatalities has highlighted the need for sensitive methodologies of analysis. In the last decade, tandem mass spectrometry has been increasingly applied for the analy...
متن کاملMultiphoton detachment from negative ions: new theory vs experiment
In this paper we compare the results of our adiabatic theory (Gribakin and Kuchiev, Phys. Rev. A, submitted for publication) with other theoretical and experimental results, mostly for halogen negative ions. The theory is based on the Keldysh approach. It shows that the multiphoton detachment rates and the corresponding n-photon detachment cross sections depend only on the asymptotic parameters...
متن کاملElectron capture dissociation, electron detachment dissociation and infrared multiphoton dissociation of sucrose octasulfate.
The structural analysis of sulfated carbohydrates such as glycosaminoglycans (GAGs) has been a long- standing challenge for the field of mass spectrometry. The dissociation of sulfated carbohydrates by collisionally- activated dissociation (CAD) or infrared multiphoton dissociation (IRMPD), which activate ions via vibrational excitation, typically result in few cleavages and abundant SO(3) loss...
متن کاملStrong dependence of multiphoton detachment rates on the asymptotic behaviour of the ground-state wave function
Two-photon detachment from the F− negative ion has been investigated within the lowest order perturbation theory. We show that in accordance with the adiabatic theory a proper asymptotic behaviour of the 2p bound state wave function is crucial for obtaining correct absolute values of the multiphoton detachment cross sections. We find that the latter are substantially higher than it was previous...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 1993
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.48.4654