Precise atomic radiative lifetime via photoassociative spectroscopy of ultracold lithium
| Autor: | Randall G. Hulet, Eric Abraham, H. T. C. Stoof, Carl J. Williams, W. I. McAlexander, N. W. M. Ritchie |
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| Rok vydání: | 1995 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics chemistry.chemical_element Molecular physics Diatomic molecule Atomic and Molecular Physics and Optics Spectral line chemistry Ab initio quantum chemistry methods Excited state Atom Physics::Atomic and Molecular Clusters Radiative transfer Lithium Physics::Atomic Physics Atomic physics Spectroscopy |
| Zdroj: | Physical Review A. 51:R871-R874 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.51.r871 |
| Popis: | We have obtained spectra of the high-lying vibrational levels of the 13Σg+ state of 6Li2 via photoassociation of ultracold 6Li atoms confined in a magneto-optical trap. The 13Σg+ state of the diatomic molecule correlates to a 2S1/2 state atom plus a 2P1/2 state atom. The long-range part of the molecular interaction potential for this state depends on the 2P atomic radiative lifetime. By calculating the energy eigenvalues of a model potential for the 13Σg+ state and fitting them to the experimentally measured vibrational levels, we have extracted a value for the 2P lifetime of 26.99±0.16 ns. The precision is currently limited by the accuracy of a region of the model potential provided by ab initio calculations. |
| Databáze: | OpenAIRE |
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