Doppler-tuned Bragg Spectroscopy of Excited Levels in He-Like Uranium: a discussion of the uncertainty contributions

Martino Trassinelli (1) , Ajay Kumar (2) , H.F. Beyer (2) , Paul Indelicato (3) , Renate Märtin (2) , Regina Reuschl (2) , Thomas Stöhlker (2)

1 INSP - Institut des Nanosciences de Paris
2 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
3 LKB (Jussieu) - Laboratoire Kastler Brossel

We present the uncertainty discussion of a recent experiment performed at the GSI storage ring ESR for the accurate energy measurement of the He-like uranium 1s2p3P2- 1s2s3S1 intra-shell transition. For this propose we used a Johann-type Bragg spectrometer that enables to obtain a relative energy measurement between the He-like uranium transition, about 4.51 keV, and a calibration x-ray source. As reference, we used the Ka fluorescence lines of zinc and the Li-like uranium 1s22p2P3/2 - 1 s22s 2S1/2 intra-shell transition from fast ions stored in the ESR. A comparison of the two different references, i.e., stationary and moving x-ray source, and a discussion of the experimental uncertainties is presented.

Domaines: Physique Atomique [physics.atom-ph]

Martino Trassinelli, Ajay Kumar, H.F. Beyer, Paul Indelicato, Renate Märtin, et al.. Doppler-tuned Bragg Spectroscopy of Excited Levels in He-Like Uranium: a discussion of the uncertainty contributions. Journal of Physics: Conference Series, 2009, 163, pp.012026. ⟨10.1088/1742-6596/163/1/012026⟩. ⟨hal-00430779⟩