IOP Publishing, Journal of Physics: Conference Series, 2(635), p. 022096, 2015
DOI: 10.1088/1742-6596/635/2/022096
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We report the first observation of correlated x rays emitted by a heavy highly charged ion such as hydrogenlike uranium in the process of radiative recombination. The angular correlations between these x rays for the first time revealed a coherence of the populated state in this ion. The results also indicate a strong contribution of the spin-orbit interaction in radiative recombination.