Two-photon ionization spectra of calcium above the 4s(1/2) threshold
Φόρτωση...
Ημερομηνία
Συγγραφείς
Cohen, S.
Liontos, I.
Bolovinos, A.
Lyras, A.
Benech, S.
Bachau, H.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Physics B-Atomic Molecular and Optical Physics
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Two-photon ionization of ground state calcium is investigated both experimentally and theoretically in the 374 - 323 nm spectral range. The spectra are dominated by the presence of the 4p(2) S-1(0) perturber and by members of even parity 3dnd J = 0, 2 (4 <= n <= 10) and 3dns J = 2 (6 <= n <= 12) autoionizing Rydberg series, the latter appearing as window resonances. No single-photon resonances are observed. The majority of recorded lines are identified using older stepwise spectroscopic data while there is a number of newly discovered low-lying members. The two previously unobserved 3dns, n <= 12, series members are treated using a semi-empirical multichannel quantum defect theory (MQDT) model. Moreover, the low-lying part of the observed predominantly singlet spectrum is fairly well reproduced by theoretical calculations, combining a configuration interaction approach with B-splines basis functions and neglecting relativistic effects. The agreement between theory and experiment becomes less satisfactory as we move towards higher lying resonances dominated by singlet-triplet mixing effects, which are evident in the experimental data while neglected in the calculations.
Περιγραφή
Λέξεις-κλειδιά
quantum-defect theory, laser optogalvanic spectroscopy, eigenchannel r-matrix, autoionizing states, theoretical-analysis, 3-photon ionization, single-photon, energy-levels, neutral ca, excitation
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000239306700009
http://iopscience.iop.org/0953-4075/39/12/006/pdf/0953-4075_39_12_006.pdf
http://iopscience.iop.org/0953-4075/39/12/006/pdf/0953-4075_39_12_006.pdf
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