Konferenzpaper

Jahr der Veröffentlichung: 2013

Zeitschrift: Physica Scripta

Bandnummer: T156

ISSN: 0031-8949

eISSN: 1402-4896

DOI Link: https://doi.org/10.1088/0031-8949/2013/T156/014022

Konferenz: 16th International Conference on the Physics of Highly Charged Ions (HCI)

Verlag: IOP Publishing

Abstract: 
The precise determination of the energy of the Lyman alpha 1 and alpha 2 lines in hydrogen-like heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields. To improve the experimental precision, the new detector concept of microcalorimeters is now exploited for such measurements. Such detectors consist of compensated-doped silicon thermistors and Pb or Sn absorbers to obtain high quantum efficiency in the energy range of 40-70 keV, where the Doppler-shifted Lyman lines are located. For the first time, a microcalorimeter was applied in an experiment to precisely determine the transition energy of the Lyman lines of lead ions at the experimental storage ring at GSI. The energy of the Ly alpha 1 line E(Ly-alpha 1,Pb-207(81+)) = (77937+/-12(stat)+/-25(syst)) eV agrees within error bars with theoretical predictions. To improve the experimental precision, a new detector array with more pixels and better energy resolution was equipped and successfully applied in an experiment to determine the Lyman-alpha lines of gold ions Au-197(78+).

Harvard-Zitierstil: Kraft-Bermuth, S., Andrianov, V., Bleile, A., Echler, A., Egelhof, P., Grabitz, P., et al. (2013) High-precision x-ray spectroscopy of highly charged ions with microcalorimeters, Physica Scripta, T156, Article 014022. https://doi.org/10.1088/0031-8949/2013/T156/014022

APA-Zitierstil: Kraft-Bermuth, S., Andrianov, V., Bleile, A., Echler, A., Egelhof, P., Grabitz, P., Ilieva, S., Kilbourne, C., Kiselev, O., McCammon, D., & Meier, J. (2013). High-precision x-ray spectroscopy of highly charged ions with microcalorimeters. Physica Scripta. T156, Article 014022. https://doi.org/10.1088/0031-8949/2013/T156/014022