3dnl-J=3(E) Autoionizing Levels of Calcium - Observation by Laser Optogalvanic Spectroscopy and Theoretical-Analysis
Φόρτωση...
Ημερομηνία
Συγγραφείς
Luckoenig, E.
Bolovinos, A.
Aymar, M.
Assimopoulos, S.
Jimoyiannis, A.
Tsekeris, P.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Zeitschrift Fur Physik D-Atoms Molecules and Clusters
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The even parity J = 3 autoionizing spectra of calcium were investigated below the 3d threshold by a two-step laser excitation from the 3d 4s metastables through the 3 d 4 p 3P2, 1F3 intermediate states. The 3 d 4 s were populated by electronic collisions in a d.c. glow discharge through a Ca heat-pipe. More than a hundred resonance transitions have been measured with an accuracy of approximately 0.2 cm-1 for the narrow ones using standard laser calibration techniques. Their upper levels are assigned to all expected nine autoionizing 3 d n s, 3 d n d and 3 d n g Rydberg series and the 4 p 5 p 3D3 perturber. The theoretical interpretation is achieved by a combination of the eigenchannel R-matrix and multichannel quantum defect (MQDT) methods. Ten closed and two open J = 3 interacting channesl are used. Theoretical energy level positions and excitation profiles are compared with the experimental data confirming the identification of the observed structures. Strong mixing between the 3d3/2 nd5/2 and 3d5/2 nd3/2 series is found, while the 3d3/2 nd3/2 and 3d5/2 nd5/2 series are almost pure jj-coupled. The calculations were particularly successful in reproducing the spectrum in the region of the 4 p 5 p 3D3 perturber, where strong chancel mixing appears leading to interference effects in the excitation cross sections.
Περιγραφή
Λέξεις-κλειδιά
quantum-defect theory, barium
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://A1994PT49300009
http://link.springer.com/content/pdf/10.1007%2FBF01425923.pdf
http://link.springer.com/content/pdf/10.1007%2FBF01425923.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