Abstract

We report progress on a measurement of the spectral distribution of photons from the two-photon decay of the 2 1S 0 level in heliumlike krypton. A measurement of the exact shape of the continuum singles spectrum of the two-photon decay in heliumlike ions provides a sensitive probe of the calculation of the transition probability. In our experiment, a beam of Kr 34+ ions is excited using a thin carbon foil and the subsequent decays are observed in an array of four X-ray detectors.

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