Schaeffer, M. W., Kim, W., Maxton, P. M., Romascan, J., Felker, P. M., Raman spectroscopy of naphthalene clusters. Evidence for a symmetrical trimmer and an.
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MOLECULAR IONIZATION-DISSOCIATION OF NAPHTHALENE IN THE MULTIPLE PHOTON ABSORPTION REGIMES Juan C. Poveda,a, b, 1 I. Álvareza and C. Cisnerosa a
Laboratorio de Colisiones Atómicas Moleculares – Instituto de Ciencias Físicas Universidad Nacional Autónoma de México Cuernavaca, Morelos, México C.P. 62210 b Laboratorio de Espectroscopia Atómica Molecular – Escuela de Química Universidad Industrial de Santander Bucaramanga, Santander, Colombia A.A. 674
INTRODUCTION In this work, we present a comprehensive analysis of the main processes resulting from the interaction of a cooled molecular beam of naphthalene with 266, 355 and 532 nm laser radiation, covering intensities between 109 to 1010 W·cm-2. First, we analyze theoretically the effect of radiation on the molecule. At higher intensities of radiation, higher than 107 W·cm-2, the molecule can show three different phenomena depending on the electric field of radiation. Ionization can be the result of multiple photon absorption, electron tunneling or the total barrier suppression ionization mechanism. At the intensities of radiation used in this work, the main detected ions are the result of the multiple photon absorption processes. Their formation is the result of two different key mechanism; ionization-dissociation processes are mainly observed when photons have the energy to be absorbed resonantly, 266 nm; it is possible to characterize ion products with one to ten carbon atoms in their structure, at very low energies per pulse,
