On the multielectron dissociative ionization of some cyclic aromatic molecules induced by strong laser fields
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Ημερομηνία
Τίτλος Εφημερίδας
Περιοδικό ISSN
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Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Physical Chemistry A
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The interaction of strong laser fields (4 x 10(16) W/cm(2)) with cyclic aromatic molecules (furan, pyrrole, pyridine, and pyrazine) has been studied at lambda = 790 nm. The fragmentation processes of multiply charged transient molecular ions were analyzed by means of a time-of-flight (TOF) spectrometer. Most ion peaks consisted of one broad and one sharp component. From the analysis of the peak profiles the kinetic energies of the molecular and atomic fragment ions have bean measured. On the basis of these energy values and the estimated charge separation distances, it is concluded that, for furan, it is probable that Coulomb explosion takes place in multiple charged parent ions with deformed molecular structure. The doubly charged parent ions of furan and pyrrole fragments through charge separation processes. At higher charged transient parent ions the fragmentation proceeds through direct (instantaneous) process. Moreover, there is evidence that, at least for furan, the ionization process takes place via a direct field ionization mechanism. Pyridine and pyrazine multiple charged ions seem to follow different dissociation routes. The abundance ratios C+/A(+) (A = N, O) for the singly charged atoms were found to be equal to the stoichiometric ratio for all the molecules studied, while a divergence has been observed for the C-2,C-3+/A(2,3+) (A = N, O) ratios.
Περιγραφή
Λέξεις-κλειδιά
induced coulomb explosion, multiply-charged ions, multiphoton ionization, femtosecond laser, polyatomic-molecules, enhanced ionization, nuclear motions, nm, pulses, photoelectron
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000167001300004
http://pubs.acs.org/doi/pdfplus/10.1021/jp001096m
http://pubs.acs.org/doi/pdfplus/10.1021/jp001096m
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών