Two-photon ionization spectra of calcium above the 4s(1/2) threshold
| dc.contributor.author | Cohen, S. | en |
| dc.contributor.author | Liontos, I. | en |
| dc.contributor.author | Bolovinos, A. | en |
| dc.contributor.author | Lyras, A. | en |
| dc.contributor.author | Benech, S. | en |
| dc.contributor.author | Bachau, H. | en |
| dc.date.accessioned | 2015-11-24T18:39:42Z | |
| dc.date.available | 2015-11-24T18:39:42Z | |
| dc.identifier.issn | 0953-4075 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17487 | |
| dc.rights | Default Licence | - |
| dc.subject | quantum-defect theory | en |
| dc.subject | laser optogalvanic spectroscopy | en |
| dc.subject | eigenchannel r-matrix | en |
| dc.subject | autoionizing states | en |
| dc.subject | theoretical-analysis | en |
| dc.subject | 3-photon ionization | en |
| dc.subject | single-photon | en |
| dc.subject | energy-levels | en |
| dc.subject | neutral ca | en |
| dc.subject | excitation | en |
| dc.title | Two-photon ionization spectra of calcium above the 4s(1/2) threshold | en |
| heal.abstract | 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. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1088/0953-4075/39/12/006 | - |
| heal.identifier.secondary | <Go to ISI>://000239306700009 | - |
| heal.identifier.secondary | http://iopscience.iop.org/0953-4075/39/12/006/pdf/0953-4075_39_12_006.pdf | - |
| heal.journalName | Journal of Physics B-Atomic Molecular and Optical Physics | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2006 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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