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Hyperfine interactions and charge distributions of actinide ions recoiling into vacuum

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Abstract

The angular distribution of conversion electrons from the 4+→2+ transition in the ground-state rotational band of240Pu has been measuredvia the238U (α,2n)240Pu reaction. The electrons are emitted in flight from the Pu nuclei recoiling into vacuum atv/c≅0.2%. The attenuation of the angular distribution by extranuclear fields is found to be less than 20% within 120 ps. The hyperfine interactions are discussed with particular attention to the high charge states of actinide recoil ions following internal conversion. Charge distributions ranging up to 45+ have been observed for240Cm nuclei in the239Pu(α,3n) reaction.

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Authors and Affiliations

  1. Max-Planck-Institut für Kernphysik, 69, Heidelberg, Germany

    V. Metag

  2. Physikalisches Institut der Universität Heidelberg, 69, Heidelberg, Germany

    D. Habs, H. -J. Specht & G. Ulfert

  3. Technische Universität München, 8046, Garching, Germany

    C. Kozhuharov

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  1. V. Metag
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  2. D. Habs
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  3. H. -J. Specht
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  4. G. Ulfert
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  5. C. Kozhuharov
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Metag, V., Habs, D., Specht, H.J. et al. Hyperfine interactions and charge distributions of actinide ions recoiling into vacuum. Hyperfine Interact 1, 405–418 (1975). https://doi.org/10.1007/BF01022471

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