High‐resolution wavelength‐dispersive spectroscopy of K‐shell transitions in hydrogen‐like gold

Abstract

We present a measurement of K‐shell transitions in H‐like gold (Au78+) using specially developed transmission type crystal spectrometers combined with Ge(i) microstrip detectors. The experiment has been carried out at the Experimental Storage Ring at GSI in Darmstadt. This is a first high‐resolution wavelength‐dispersive measurement of a K‐shell transition in a high‐Z H‐like ion, thus representing an important milestone in this field. Ideas on possible future improvements are discussed as well.

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

“…silicon or germanium, this novel type of detector provides an improvement of the intrinsic energy resolution by more than one order of magnitude. The achievable resolution is therefore on the same level as the hard x-ray crystal spectrometer FOCAL, which has recently demonstrated an impressive resolution of about 50 eV at 60 keV incident photon energy [23,24]. At the same time, microcalorimeters can be designed to have acceptable stopping powers over a broad range of x-ray energies from a few keV to hundreds of keV, comparable to conventional semiconductor x-ray detectors, whereas the FOCAL setup features a low efficiency on the 10 −8 level and covers an energy range of only a few keV around the line of interest.…”