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Metastable level lifetimes from electron-shelving measurements with ion clouds and single ions

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Abstract.

The lifetime of the \(3d^2\rm D_{5/2}\)-level in singly-ionized calcium has been measured by the electron-shelving technique on different samples of rf trapped ions. The metastable state has been directly populated by exciting the dipole-forbidden \(\rm 4S_{1/2} - 3D_{5/2}\) transition. In ion clouds, the natural lifetime of this metastable level has been measured to be (\(1095\pm27\)) ms. For the single-ion case, we determined a lifetime of (\(1152\pm20\)) ms. The \(1\sigma\)-error bars at the 2%-level have different origins for the two kinds of experiments: data fitting methods for lifetime measurements in an ion cloud and control of experimental parameters for a single ion. De-shelving effects are extensively discussed. The influence of differing approaches for the processing of the single-ion quantum jump data on the lifetime values is shown. Comparison with recent measurements shows excellent agreement when evaluated from a given method.

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Authors and Affiliations

  1. Physique des Interactions Ioniques et Moléculaires, CNRS - Université de Provence (UMR 6633), Centre de Saint Jérôme, Case C21, 13397, Marseille Cedex 20, France

    M. Knoop, C. Champenois, G. Hagel, M. Houssin, C. Lisowski, M. Vedel & F. Vedel

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  1. M. Knoop
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  2. C. Champenois
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  3. G. Hagel
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  4. M. Houssin
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  5. C. Lisowski
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  6. M. Vedel
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  7. F. Vedel
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Correspondence to M. Knoop.

Additional information

Received: 14 November 2003, Published online: 24 February 2004

PACS:

32.70.Cs Oscillator strengths, lifetimes, transition moments - 32.80.Pj Optical cooling of atoms, trapping

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Knoop, M., Champenois, C., Hagel, G. et al. Metastable level lifetimes from electron-shelving measurements with ion clouds and single ions. Eur. Phys. J. D 29, 163–171 (2004). https://doi.org/10.1140/epjd/e2004-00022-6

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  • DOI: https://doi.org/10.1140/epjd/e2004-00022-6

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