Collinear resonance ionization spectroscopy of neutron-deficient francium isotopes

K. T. Flanagan, K. M. Lynch, J. Billowes, M. L. Bissell, I. Budinčević, T. E. Cocolios, R. P. De Groote, S. De Schepper, V. N. Fedosseev, S. Franchoo, R. F. Garcia Ruiz, H. Heylen, B. A. Marsh, G. Neyens, T. J. Procter, R. E. Rossel, S. Rothe, I. Strashnov, H. H. Stroke, K. D.A. Wendt

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    Abstract

    The magnetic moments and isotope shifts of the neutron-deficient francium isotopes Fr202-205 were measured at ISOLDE-CERN with use of collinear resonance ionization spectroscopy. A production-to-detection efficiency of 1% was measured for Fr202. The background from nonresonant and collisional ionization was maintained below one ion in 105 beam particles. Through a comparison of the measured charge radii with predictions from the spherical droplet model, it is concluded that the ground-state wave function remains spherical down to Fr205, with a departure observed in Fr203 (N=116).

    Original languageEnglish (US)
    Article number212501
    JournalPhysical Review Letters
    Volume111
    Issue number21
    DOIs
    StatePublished - Nov 19 2013

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Flanagan, K. T., Lynch, K. M., Billowes, J., Bissell, M. L., Budinčević, I., Cocolios, T. E., De Groote, R. P., De Schepper, S., Fedosseev, V. N., Franchoo, S., Garcia Ruiz, R. F., Heylen, H., Marsh, B. A., Neyens, G., Procter, T. J., Rossel, R. E., Rothe, S., Strashnov, I., Stroke, H. H., & Wendt, K. D. A. (2013). Collinear resonance ionization spectroscopy of neutron-deficient francium isotopes. Physical Review Letters, 111(21), [212501]. https://doi.org/10.1103/PhysRevLett.111.212501