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Absolute nuclear radii of Ir isotopes determined by EUV spectroscopy of highly charged ions

ORAL

Abstract

High-statistics, precision EUV spectroscopy was implemented in measuring the nuclear radii difference between Os and Ir for determination of the absolute nuclear radius of Ir.  The EBIT facility at NIST produced highly charged ions at a beam energy of about 18 keV.  Flat-field grazing incidence spectrometer with a CCD pixel resolution of about 0.1 eV was used to record the Na-like 3s1/2–3p1/2 D1 line and the Mg-like and 3s­­2 1S0–3s3p-1P1 line of both elements. The energy shifts of the elements’ transitions were measured over several days by cycling the injection of Os, Ir, and Ne into the EBIT. The measured shifts are directly related to the mean square radii through the nuclear Seltzer moment. Calculations were performed by GRASP2K and RMBPT packages.

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Presenters

  • Adam T Hosier

    Clemson University

Authors

  • Adam T Hosier

    Clemson University

  • Dipti Dipti

    National Institute of Standards and Technology, National Institute of Standards and Technology, Gaithersburg, MD, National Institute of Standards and Technology, Gaithersburg, MD 20899, NIST

  • Roshani Silwal

    Appalachian State University, Boone, NC

  • Alain Lapierre

    National Superconducting Cyclotron Laboratory, East Lansing MI

  • Steven A Blundell

    CEA Grenoble

  • Samuel Sanders

    Clemson University

  • Yang Yang

    Clemson University

  • Paul Szypryt

    National Institute of Standards and Technology, National Institute of Standards and Technology, Boulder, CO, National Institute of Standards and Technology, Boulder, CO 80305

  • Joseph Tan

    National Institute of Standards and Technology, National Institute of Standards & Technology, National Institute of Standards and Technology, Gaithersburg, MD, National Institute of Standards and Technology, Gaithersburg, MD 20899

  • Aung S Naing

    University of Delaware, National Institute of Standards and Technology, University of Delaware, National Institute of Standards & Technology, University of Delaware, National Institute of Standards and Technology, Gaithersburg, MD, National Institute of Standards and Technology, Gaithersburg, MD 20899

  • Joan M Dreiling

    National Institute of Standards and Technology, Boulder, CO

  • Gerald Gwinner

    Univ of Manitoba

  • Antonio C Villari

    Michigan State University

  • Yuri Ralchenko

    National Institute of Standards and Technology

  • Endre Takacs

    Clemson University