Multiphoton single and double ionisation of strontium in the range 532-541 nm
| dc.contributor.author | Pillet, P. Camus | en |
| dc.contributor.author | M. Kompitsas | en |
| dc.contributor.author | S. Cohen | en |
| dc.contributor.author | C. Nicolaides | en |
| dc.contributor.author | M. Aymar | en |
| dc.contributor.author | M. Crance | en |
| dc.contributor.author | P. | en |
| dc.date.accessioned | 2015-11-24T18:40:14Z | |
| dc.date.available | 2015-11-24T18:40:14Z | |
| dc.identifier.issn | 0953-4075 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17589 | |
| dc.rights | Default Licence | - |
| dc.title | Multiphoton single and double ionisation of strontium in the range 532-541 nm | en |
| heal.abstract | By focusing an excimer pumped dye laser on an atomic beam, the authors have observed multiphoton multiple ionisation of the neutral strontium atom in the tuned wavelength range 532-41 nm. Sr + and Sr ++ yields were measured with a time of flight spectrometer. At least three photons are required to produce Sr + and eight photons to produce Sr ++ . As a function of the wavelength, the Sr + yield exhibits resonances which correspond to two-photon excitation of bound states (5s 2 -5p 2 1 D 2 and 5s 2 -5p 2 1 S 0 ) and three-photon excitation of autoionising states 4d5f J=1 and J=3 of the neutral atom. The Sr ++ yield exhibits four broad smooth resonances that they interpret, from known spectroscopic data, as two-photon (5p 1/2 -4f), three-photon (5s-6p 1/2, 3/2 ) and four-photon (5s-7d) resonances in the singly charged ion. The latter transitions start from a singly charged ion in the 5s or 5p 1/2 state reached after three- or four-photon ionisation of the neutral ground state. The variation of the Sr ++ pattern as a function of the dye laser beam intensity shows that resonances are shifted and broadened when the intensity is increased. These features have been interpreted by a perturbative treatment of Sr + ionisation based on the use of an effective Hamiltonian which takes into account higher-order terms involved in the calculation of resonance effects. Calculated multiphoton ionisation probabilities are in good agreement with experimental data. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | http://stacks.iop.org/0953-4075/22/i=3/a=010 | - |
| heal.journalName | Journal of Physics B: Atomic, Molecular and Optical Physics | en |
| heal.journalType | peer reviewed | - |
| heal.publicationDate | 1989 | - |
| 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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