EUV-spectroscopy of beam-foil excited 14.25 MeV/u Xe52 + ... Xe49 + -ions

Abstract

14.25 MeV/u Xe -ions with charges q = 52, 51, 50 and 49 were sent through carbon foils of 50 ~tg/cm 2. Beam -foil spectra between 6 nm and 14 nm were registered using the GSI 5 m grazing incidence spectrometer. The spectra are dominated by Rydberg transitions from levels with n from 12 to 7. As weak features, 2s-2p transitions in Li-and Be-like ions were observed. Their wavelengths were determined with an accuracy of 0.02 nm using modelled Rydberg lines for the wavelength scale calibration. Very good agreement with experimental and theoretical results was obtained. The present limitation for the use of Rydberg lines for an in-situ Doppler shift corrected calibration is emphasized. PACS: 32.30.Jc; 12.20.Fv

Spectroscopy of berylliumlike xenon ions using dielectronic recombination

“…1 IC line was observed in the tokamak plasma of the Joint European Torus [10]. The same line was investigated in Ag 43+ , Sn 46+ and Xe 50+ by means of beam foil spectroscopy [11,12], and in Xe 50+ , in addition, in an electron beam ion trap (EBIT) [9]. To our knowledge, the only available experimental data for Be-like ions heavier than xenon was obtained for the → S P 1 0 1…”

Time resolved EUV spectroscopy on foil-excited 5.9 MeV/u Xe and 13.2 MeV/u Au ions

“…1. Further details of the set-up and of the data collection and evaluation procedures for spectra have been published in earlier papers ( [23,24] and refs. MCP is the microehannelplate detector of 5.9 MeV/amu is at optimum for the production of the Na-like Xe ion with q = 43 +, by ion-foil interaction with a foil sufficiently thick to reach equilibrium [19,20].…”

“…Detailed calibrations are in principle available from Rydberg transitions in highly-ionized atoms [24]. VUV light from a Penning discharge lamp mounted on the other side of the ion beam path was then used to optimize the detector setting (position and tilt) with respect to the Rowland circle, and to measure the dispersion.…”

Relativistic multireference many-body perturbation theory calculations on F-, Ne-, Na-, Mg-, Al-, Si- and P-like xenon ions

“…The experimental set-up of the beam-foil work on Xe and Au at the Darmstadt (Germany) GSI UNILAC accelerator has been described elsewhere [7][8][9]. This experimental arrangement has gone through various development stages; most of the experimental effort was directed at the precision spectroscopy of few-electron ions, in particular the determination of QED contributions to the transition energies of n = 2-2 transitions in Li-and Be-like ions [34][35][36][37][38]. In contrast, the spectral lines of interest in the present study are largely in a spectral range beyond the reach of calibration lines from the stationary calibration light source available.…”