Spectroscopy of 2s[subscript 1/2]-2p[subscript 3/2] transitions in W[superscript 65+] through W[superscript 71+]

• Main Authors: Gu, Ming F. (Author), Brown, G. V. (Author), Williamson, J. (Author), Beiersdorfer, P. (Author), Clementson, J. (Author), Podpaly, Yuri A. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Nuclear Science and Engineering (Contributor), Massachusetts Institute of Technology. Plasma Science and Fusion Center (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-03-12T17:47:16Z.
• Subjects: Article
• Online Access: Get fulltext

A high-resolution flat-crystal spectrometer was used on the SuperEBIT electron beam ion trap to measure the energies of the 2s[subscript 1/2]-2p[subscript 3/2] transitions in lithiumlike through fluorinelike tungsten. These transitions are strongly affected by energy shifts due to quantum electrodynamics (QED). SuperEBIT was run at an electron energy of 103.2±0.5 keV and an electron beam current of 150 mA to generate the respective charge states; hydrogenlike aluminum and neonlike krypton were used as calibration elements. The spectra were analyzed with and the results compared to calculations based on the flexible atomic code. Good agreement was found. The measurements yielded line positions with a precision of 1-2 eV, which test QED calculations to 5%-10%.
Laboratory Directed Research and Development Program (Project No. 09-ERD-013)
United States Department of Energy (Contract No. DE-AC52-07NA-27344)