Intense-field laser ionization rates in atoms and molecules

Abstract

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Intense-field laser ionization rates in atoms and molecules NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=12338288&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=12338288&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1103/PhysRevA.64.013405Physical Review A, 64, 1, pp. 013405-1-013405-12, 2001-06-05 Intense-field laser ionization rates in atoms and molecules We discuss experiments on the ionization of atoms and molecules in intense laser fields, designed to facilitate a comparison of theory and experiment especially in the case of complex molecules. We concentrate on ionization in the regime where single ionization dominates. We describe an approach which allows a direct measurement of ionization efficiencies, absolute ionization rates, and well-defined saturation intensities. In addition, intensities where multiple ionization and Coulomb explosion set in are determined. We also analyze how ion yields are sensitive to any dependence of ionization rates on molecular alignment. Application of these procedures to molecular ionization is demonstrated in detail for the organic molecules benzene and cyclohexane.

Absolute Ionization Rates of Multielectron Transition Metal Atoms in Strong Infrared Laser Fields

“…The strong field ionization of two-electron atoms (Mg and Ca) show perhaps the first hints of deviation from the SF-SAE picture [4,5]. More complex multielectron correlation phenomena, showing a complete failure of the SF-SAE picture, were observed in the strong field ionization of polyatomic molecules in both the adiabatic [6,7] and nonadiabatic [8,9] regimes. Diatomic molecules also show differences from SAE atoms that relate to the molecular nature of the physics [10 -12].…”

“…We implemented the saturation intensity method that employs a constant axial intensity ion collection geometry, as discussed in detail elsewhere [6,7]. Briefly, a 500 mn slit perpendicular to the laser propagation direction permitted collection only of ions formed in a region of constant axial intensity.…”

“…As I sat is an atomic property which does not depend on experimental factors such as detection efficiency or focusing geometry, comparison with theory is unambiguous. Absolute laser intensities were determined by in situ calibration against the known saturation intensity of xenon, as described in detail elsewhere [7].…”

Internal Laser-Induced Dipole Force at Work inC60Molecule

“…It determines the ionization dynamics and it is through the electronic response that the internal dipole force is exerted. We measure the intensity at which the ionization probability reaches saturation, I sat , for each charge state of C z 60 [13,18]. The results are shown in Fig.…”

Dynamics of strong-field laser-induced microplasma formation in noble gases

“…Following the approach used in Ref. [39] for multiphoton ionization by a square pulse, the total degree of ionization (the ratio of the number of ionized atoms to the total number of atoms in the interaction volume) is then obtained as, …”