High-resolution laser spectroscopy of long-lived plutonium isotopes

A. Voss, V. Sonnenschein, P. Campbell, B. Cheal, T. Kron, I. D. Moore, I. Pohjalainen, S. Raeder, N. Trautmann, K. Wendt

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    Abstract

    Long-lived isotopes of plutonium were studied using two complementary techniques, high-resolution resonance ionization spectroscopy (HR-RIS) and collinear laser spectroscopy (CLS). Isotope shifts have been measured on the 5f67s27F0→5f56d27s(J=1) and 5f67s27F1→5f67s7p(J=2) atomic transitions using the HR-RIS method and the hyperfine factors have been extracted for the odd mass nuclei Pu239,241. CLS was performed on the 5f67s8F1/2→J=1/2(27523.61cm-1) ionic transition with the hyperfine A factors measured for Pu239. Changes in mean-squared charge radii have been extracted and show a good agreement with previous nonoptical methods, with an uncertainty improvement by approximately one order of magnitude. Plutonium represents the heaviest element studied to date using collinear laser spectroscopy.

    Original languageEnglish
    Article number032506
    JournalPhysical Review A
    Volume95
    Issue number3
    DOIs
    Publication statusPublished - 24 Mar 2017

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