E. Trabert

Publications (4)0.86 Total impact

• Source

  Available from: Kevin B Fournier

  Article: Soft-X-ray spectra of highly charged Os, Bi, Th, and U ions in an electron beam ion trap (vol 83, pg 829, 2005)

  E. Trabert, P. Beiersdorfer, K. B. Fournier, M. H. Chen
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  ABSTRACT: Systematic variation of the electron-beam energy in an electron-beam ion trap has been employed to produce soft-X-ray spectra of Os, Bi, Th, and U with the highest charge states ranging up to Ni-like ions. Guided by relativistic atomic structure calculations, the strongest lines have been identified with Dn = 0 (n = 4 to n' = 4) transitions in Rb- to Cu-like ions. The rather weak 4p–4d transitions are much less affected by QED contributions than the dominant 4s–4p transitions. Our wavelength measurements consequently provide benchmarks with and (almost) without QED. Because the radiative corrections are not very sensitive to the number of electrons in the valence shell, our data, moreover, provide benchmarks for the evaluation of electron–electron interactions.
  Canadian Journal of Physics 07/2006; 84:773-773. · 0.86 Impact Factor
• Article: Forbidden transitions in the visible spectra of an electron beam ion trap (EBIT)

  E. Trabert, P. Beiersdorfer, SB Utter, JRC Lopez-Urrutia
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  ABSTRACT: In an explorative study of visible spectra from an electron beam ion trap (EBIT), a variety of rare-gas ion species has been excited and stored. The spectra reveal several forbidden lines and also show peculiarities of general interest to EBIT users. The lifetime of the 3s(2)3p(2) P-3(2) level in Si-like Kr22+ has been measured as [(6.3 +/- 0.3)ms]. The M1 transition 3s(2)3p(2) P-3(1)-P-3(2) in the Si-like ion Mo28+ has been observed at (284.0 +/- 0.2) M1, confirming an identification from tokamak observations by Denne et al. The 3d(4) D-5(2)-D-5(3) transition in Ti-like Au has been found at (353.2 +/- 0.2)nm and thus the predicted isoelectronic trend been confirmed.
  PHYSICA SCRIPTA. 58(6):599-604.
• Article: (M1+E2) decay rate in Ar2+ ions measured at a heavy-ion storage ring

  E. Trabert, G. Gwinner
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  ABSTRACT: The radiative lifetime of the 3s(2)3p(4) S-1(0) level in Ar2+ ions has been measured by time-resolved observation of the magnetic dipole (M1) transition to the ns(2) np(4) P-3(1) level, on ions circulating in a heavy-ion storage ring. The result of 145 +/- 5 ms compares well with various theoretical predictions, but is significantly more accurate and more precise than earlier measurements.
  Physical Review A, v.6501, 014501-014501 (2002).
• Source

  Available from: llnl.gov

  Article: M1 transition rate in Cl12+ from an electron-beam ion trap and heavy-ion storage ring

  E. Trabert, P. Beiersdorfer, G. Gwinner, E. H. Pinnington, A Wolf
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  ABSTRACT: The transition probability of the magnetic dipole (M1) transition 2s(2)2p P-2(o) J=1/2 to J(')=3/2 (lambda=574.19 nm) in the B-like ion Cl12+ has been measured using two different light sources, the Heidelberg heavy-ion storage ring TSR and the Livermore electron-beam ion trap EBIT-I. Our results for the atomic level lifetime are 21.2+/-0.6 ms from the heavy-ion storage ring and 21.0+/-0.5 ms from the Livermore electron-beam ion trap. Particular attention has been paid to systematic errors, making this experiment a common reference for atomic level lifetime measurements in the visible spectrum.
  Physical Review A, v.66, 052507-052507 (2002).