B. Cederström, R. N. Cahn, M. Danielsson, M. Lundqvist, D. R. Nygren
Nature 404, 951 (2000)
An editing error altered the intended meaning of the last two sentences of the seventh paragraph, which should read “We used PVC for focusing. As it contains a large fraction of chlorine, it provides less gain than PMMA, for example.” Thus PVC is inferior to PMMA, but we used it for demonstration anyway.
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The online version of the original article can be found at 10.1038/35010190
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Erratum: Focusing hard X-rays with old LPs. Nature 405, 756 (2000). https://doi.org/10.1038/35015680
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DOI: https://doi.org/10.1038/35015680
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