Laser and microwave spectroscopy of even-parity Rydberg states of neutral ytterbium and Multichannel Quantum Defect Theory analysis
| Autor: | Thomas Gallagher, Wilfried Maineult, E. Luc-Koenig, H. Lehec, P. Cheinet, Pierre Pillet, A. Zuliani, F. Niyaz |
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| Přispěvatelé: | Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] Atomic Physics (physics.atom-ph) FOS: Physical sciences 01 natural sciences 3. Good health 010305 fluids & plasmas Physics - Atomic Physics symbols.namesake Quantum defect [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] Ionization Field desorption 0103 physical sciences Rydberg formula symbols Rotational spectroscopy Atomic physics 010306 general physics Ground state Spectroscopy Excitation |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2018 |
| ISSN: | 1050-2947 1094-1622 |
| Popis: | New measurements of high-lying even parity $6sns\, {}^1 \! S_0$ and $6snd\,{}^{3,1}\!D_2$ levels of neutral $^{174}$Yb are presented in this paper. Spectroscopy is performed by a two-step laser excitation from the ground state $4f^{14}6s^2 \, {}^1 \! S_0$, and the Rydberg levels are detected by using the field ionization method. Additional two-photon microwave spectroscopy is used to improve the relative energy accuracy where possible. The spectroscopic measurements are complemented by a multichannel quantum defect theory (MQDT) analysis for the J=0 and the two-coupled J=2 even parity series. We compare our results with the previous analysis of Aymar {\it{et al}} \cite{Aymar_1980} and analyze the observed differences. From the new MQDT models, a revised value for the first ionization limit $I_{6s}=50443.07041(25)$ cm$^{-1}$ is proposed. 15 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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