Improved electron-beam ion-trap lifetime measurement of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Ne</mi></mrow><mrow><mn>8</mn><mo>+</mo></mrow></msup></mrow><mi> </mi><mn>1</mn><mi>s</mi><mn>2</mn><mi>s</mi><mrow><msup><mrow><mi></mi></mrow><mrow><mn>3</mn></mrow></msup></mrow><mrow><msub><mrow><mi>S</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math></span> level

E. Träbert; P. Beiersdorfer; G. V. Brown; A. J. Smith; S. B. Utter; M. F. Gu; D. W. Savin

doi:10.1103/PhysRevA.60.2034

Improved electron-beam ion-trap lifetime measurement of the ${Ne}^{8 +} 1 s 2 s^{3} S_{1}$ level

E. Träbert, P. Beiersdorfer, G. V. Brown, A. J. Smith, S. B. Utter, M. F. Gu, and D. W. Savin

Phys. Rev. A 60, 2034 – Published 1 September 1999

Abstract

An earlier electron-beam ion-trap (EBIT) lifetime measurement of the ${Ne}^{8 +} 1 s 2 s^{3} S_{1}$ level has been improved upon, reducing the uncertainties to less than the scatter in the existing theoretical calculations. The new result, $91.7 \pm 0.4 μ s,$ agrees with the previous value, but is more precise by a factor of 4. The new value distinguishes among theoretical values, as agreement is obtained only with those calculations that employ “exact” nonrelativistic or relativistic wave functions. Routes to measurements with even higher accuracy are discussed.

Received 15 March 1999

DOI:https://doi.org/10.1103/PhysRevA.60.2034

Authors & Affiliations

E. Träbert^*, P. Beiersdorfer, G. V. Brown, A. J. Smith^†, and S. B. Utter

Department of Physics and Space Technology, Lawrence Livermore National Laboratory, Livermore, California 94551

M. F. Gu and D. W. Savin

Department of Physics and Columbia Astrophysics Laboratory, Columbia University, New York, New York 10027

^*Permanent address: Experimentalphysik III, Ruhr-Universität Bochum, D-44780 Bochum, Germany. Electronic address: Traebert@ep3.ruhr-uni-bochum.de
^†Permanent address: Department of Physics, Morehouse College, Atlanta, GA 30314.

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Vol. 60, Iss. 3 — September 1999

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