Agustsson, S;
Bianchi, G;
Calabrese, R;
Corradi, L;
Dainelli, A;
Khanbekyan, A;
Marinelli, C;
... Tomassetti, L; + view all
(2017)
Observation of 7p²P₃ ₂→7d²D optical transitions in 209 and 210 francium isotopes.
[Letter].
Optics Letters
, 42
(18)
pp. 3682-3685.
10.1364/OL.42.003682.
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Abstract
We report on the direct experimental observation of the 7p2P3∕2 → 7d2D 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 7p2P3∕2 → 7d2D5∕2 of 209Fr, not yet experimentally observed, and 7p2P3∕2 → 7d2D5∕2, 7p2P3∕2 → 7d2D5∕2 of 210Fr were detected as subDoppler 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.
| Type: | Article |
|---|---|
| Title: | Observation of 7p²P₃ ₂→7d²D optical transitions in 209 and 210 francium isotopes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1364/OL.42.003682 |
| Publisher version: | http://doi.org/10.1364/OL.42.003682 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1573589 |
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