Observation of 7p(2)P(3/2) -> 7d(2)D optical transitions in 209 and 210 francium isotopes
| Autor: | L. Corradi, Emilio Mariotti, A. Khanbekyan, G. Mazzocca, Leonardo Ricci, Carmela Marinelli, Roberto Calabrese, Luca Marmugi, A. Dainelli, Giovanni Bianchi, Luca Tomassetti, Luigi Moi, S. Agustsson, Leonardo Stiaccini |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Population
chemistry.chemical_element Electron 01 natural sciences Francium NO 010309 optics PHYSICS ATOMS Ultracold atom 0103 physical sciences Physics::Atomic Physics 010306 general physics education LASER SPECTROSCOPY Hyperfine structure Physics education.field_of_study TRAPPED FRANCIUM SHIFTS Atomic and Molecular Physics and Optics Dipole chemistry Excited state Atomic physics Electric dipole transition |
| Popis: | We report on the direct experimental observation of the 7pP23/2→7dD2 optical transitions in 209 and 210 francium isotopes. By continuously monitoring the fluorescence emitted by the isotopes collected in a magneto-optical trap (MOT), the electric dipole transitions 7pP23/2→7dD25/2 of Fr209, not yet experimentally observed, and 7pP23/2→7dD25/2, 7pP23/2→7dD25/2 of Fr210 were detected as sub-Doppler depletion dips of the cold atom population. This approach allowed unambiguous identification of the excited state hyperfine structures, even in the absence of a large stable vapor. Our findings demonstrate the effectiveness and the flexibility of fluorescence monitoring of trap depletion upon laser excitation, and broaden the experimental knowledge of francium isotopes and their electronic and nuclear properties. These results will have a relevant impact on ongoing researches for low-energy testing of fundamental symmetries with francium, from atomic parity non-conservation to the electron dipole moment. |
| Databáze: | OpenAIRE |
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