Breakthrough measurements of a rare decay process in an excited barium nucleus pave the way for the development of techniques that probe the structure and decay modes of atomic nuclei. See Letter p.406
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Gade, A. Sometimes γ-rays come in twos. Nature 526, 330–331 (2015). https://doi.org/10.1038/526330a
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DOI: https://doi.org/10.1038/526330a
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