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. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=77667172-806f-4b66-a460-e34168ef3387 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=77667172-806f-4b66-a460-e34168ef3387 Sciences, National Research Council of Canada, 100 Sussex DriVe, Ottawa, Ontario K1A 0R6, Canada ReceiVed: October 24, 2000; In Final Form: January 17, 2001 We describe the preparation of diatomic trications using intense femtosecond laser pulses, and discuss the feasibility of using femtoseond pump-probe techniques to measure the vibrational spectrum of Cl 2 3+ . Initial attempts to observe the vibrational spectra of Cl 2 3+ were unsuccessful. Possible refinements to the experiment are guided by calculations of the electronic states, transition moments, and field-dressed potential curves for Cl 2 3+ . Solution of the time-dependent Schrödinger equation using these theoretical data as input allow an accurate simulation of pump-probe experiments and their time-delay signals. Optimization of the experimental parameters via the simulation suggests an improved approach to obtaining the spectra of trications, with special emphasis on the unusual aspects of these systems. Production and Study of Triply Charged Diatomic Ions with Femtosecond Pulses

Collisional energy transfer probabilities of highly excited molecules from kinetically controlled selective ionization (KCSI). I. The KCSI technique: Experimental approach for the determination of P(E ′ ,E) in the quasicontinuous energy range A subpicosecond pump-probe laser study of ionization and geminate charge recombination kinetics in alkane liquids This paper is a theoretical study of the effect of a pulsed ir laser on a neutral Cl 2 molecule, leading to the creation of highly-charged molecular ions. We also develop a new quantum-mechanical model for the ionization of diatomic molecules in the tunneling regime. We consider the effects of the pump pulse duration and also the wavelength of the probe laser on the trication Cl 2 3ϩ which is metastable, and consider how an experiment could be performed which would lead to the observation of its vibrational spectrum. The treatment considers nuclear wave packet dynamics which begin with vertical ionization from neutral Cl 2 to Cl 2 2ϩ , includes dynamics arising from the intermediate charged state Cl 2 2ϩ , and electronic excitation and dissociation from the trication Cl 2 3ϩ . The dynamical simulations of a pump-probe experiment show modulated signals which can be Fourier-transformed to yield vibrational spectra. The quality of the modulated signal changes dramatically at an intermediate ͑relative to the vibrational period͒ pump pulse duration ͑at ca. 50 fs͒. Analysis of this effect shows how to maximize the probability of observing a simple vibrational spectrum for a highly charged diatomic created in a laser field.