Abstract

Low-temperature calorimetric detectors are now successfully used in experiments on Lamb-Shift measurements at experimental storage rings. Strong Doppler broadening of the detected X-ray lines is a prominent feature of these experiments. Accordingly, an optimization procedure for the absorber thickness is proposed that considers the self-width of the X-ray detector line, the Doppler broadening, and the absorption efficiency, taking into account the possibility of the escape of secondary radiation. The optimum thickness for Sn-absorbers in this type of experiments is determined as 0.17 mm.

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