Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry

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

    Research output: Contribution to journalArticle

    Abstract

    The magnetic dipole moments and changes in mean-square charge radii of the neutron-rich 218m,219,229,231Fr isotopes were measured with the newly installed Collinear Resonance Ionization Spectroscopy (CRIS) beam line at the On-Line Isotope Mass Separator (ISOLDE), CERN, probing the 7s2S1/2 to 8p2P3/2 atomic transition. The δr2A,221 values for 218m,219Fr and 229,231Fr follow the observed increasing slope of the charge radii beyond N=126. The charge radii odd-even staggering in this neutron-rich region is discussed, showing that 220Fr has a weakly inverted odd-even staggering while 228Fr has normal staggering. This suggests that both isotopes reside at the borders of a region of inverted staggering, which has been associated with reflection-asymmetric shapes. The g(219Fr)=+0.69(1) value supports a π1h9/2 shell-model configuration for the ground state. The g(229,231Fr) values support the tentative Iπ(229,231Fr)=(1/ 2+) spin and point to a πs1/2-1 intruder ground-state configuration.

    Original languageEnglish (US)
    Article number014317
    JournalPhysical Review C - Nuclear Physics
    Volume90
    Issue number1
    DOIs
    StatePublished - Jul 23 2014

    Fingerprint

    francium
    staggering
    laser spectroscopy
    borders
    isotopes
    asymmetry
    radii
    neutrons
    ground state
    separators
    configurations
    magnetic dipoles
    dipole moments
    magnetic moments
    slopes
    ionization
    spectroscopy

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Budinčević, I., Billowes, J., Bissell, M. L., Cocolios, T. E., De Groote, R. P., De Schepper, S., ... Wendt, K. D. A. (2014). Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry. Physical Review C - Nuclear Physics, 90(1), [014317]. https://doi.org/10.1103/PhysRevC.90.014317

    Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry. / Budinčević, I.; Billowes, J.; Bissell, M. L.; Cocolios, T. E.; De Groote, R. P.; De Schepper, S.; Fedosseev, V. N.; Flanagan, K. T.; Franchoo, S.; Garcia Ruiz, R. F.; Heylen, H.; Lynch, K. M.; Marsh, B. A.; Neyens, G.; Procter, T. J.; Rossel, R. E.; Rothe, S.; Strashnov, I.; Stroke, H. H.; Wendt, K. D A.

    In: Physical Review C - Nuclear Physics, Vol. 90, No. 1, 014317, 23.07.2014.

    Research output: Contribution to journalArticle

    Budinčević, I, Billowes, J, Bissell, ML, Cocolios, TE, De Groote, RP, De Schepper, S, Fedosseev, VN, Flanagan, KT, Franchoo, S, Garcia Ruiz, RF, Heylen, H, Lynch, KM, Marsh, BA, Neyens, G, Procter, TJ, Rossel, RE, Rothe, S, Strashnov, I, Stroke, HH & Wendt, KDA 2014, 'Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry', Physical Review C - Nuclear Physics, vol. 90, no. 1, 014317. https://doi.org/10.1103/PhysRevC.90.014317
    Budinčević I, Billowes J, Bissell ML, Cocolios TE, De Groote RP, De Schepper S et al. Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry. Physical Review C - Nuclear Physics. 2014 Jul 23;90(1). 014317. https://doi.org/10.1103/PhysRevC.90.014317
    Budinčević, I. ; Billowes, J. ; Bissell, M. L. ; Cocolios, T. E. ; De Groote, R. P. ; De Schepper, S. ; Fedosseev, V. N. ; Flanagan, K. T. ; Franchoo, S. ; Garcia Ruiz, R. F. ; Heylen, H. ; Lynch, K. M. ; Marsh, B. A. ; Neyens, G. ; Procter, T. J. ; Rossel, R. E. ; Rothe, S. ; Strashnov, I. ; Stroke, H. H. ; Wendt, K. D A. / Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry. In: Physical Review C - Nuclear Physics. 2014 ; Vol. 90, No. 1.
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    AU - Bissell, M. L.

    AU - Cocolios, T. E.

    AU - De Groote, R. P.

    AU - De Schepper, S.

    AU - Fedosseev, V. N.

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    AU - Heylen, H.

    AU - Lynch, K. M.

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    AU - Neyens, G.

    AU - Procter, T. J.

    AU - Rossel, R. E.

    AU - Rothe, S.

    AU - Strashnov, I.

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