Phys.Rev. C 93, 014319 (2016)

K.M.Lynch, T.E.Cocolios, J.Billowes, M.L.Bissell, I.Budincevic, T.Day Goodacre, R.P.de Groote, G.J.Farooq-Smith, V.N.Fedosseev, K.T.Flanagan, S.Franchoo, R.F.Garcia Ruiz, H.Heylen, R.Li, B.A.Marsh, G.Neyens, R.E.Rossel, S.Rothe, H.H.Stroke, K.D.A.Wendt, S.G.Wilkins, X.Yang

Combined high-resolution laser spectroscopy and nuclear decay spectroscopy for the study of the low-lying states in ²⁰⁶Fr, ²⁰²At, and ¹⁹⁸Bi

NUCLEAR REACTIONS U(p, F)²⁰⁶Fr/^206mFr, E=1.4 GeV; measured collinear resonance ionization spectrum of 3(+) g.s., 7(+) and 10(-) isomers relative to that for ²²¹Fr using ISCOOL setup at ISOLDE-CERN.

ATOMIC PHYSICS ^206,206mFr; measured hyperfine structure, collinear resonance ionization spectrum for ²⁰⁶Fr, ^206m1Fr and ^206m2Fr; deduced nuclear spin, hyperfine structure parameters of atomic levels, isotope shifts, isomer shifts for ground state and isomers of ²⁰⁶Fr.

NUCLEAR MOMENTS ^206,206mFr; measured hyperfine structure with collinear resonance ionization spectroscopy of ²⁰⁶Fr, ^206m1Fr and ^206m2Fr using CRIS at CERN-ISOLDE; deduced levels, J, magnetic dipole and electric quadrupole moments, isotope and isomer shifts, rms charge radii. Comparison with previous experimental values.

RADIOACTIVITY ^206,206mFr, ^202,202mAt(α)[²⁰⁶Fr from U(p, F), E=1.4 GeV; ²⁰²At from ²⁰⁶Fr α decay]; measured Eα, Iα, α-decay branching ratios for decays of ²⁰⁶Fr, ^206m1Fr, ^206m2Fr, ²⁰²At, ^202m1At and ^202m2At using laser-assisted nuclear decay spectroscopy at ISOLDE-CERN. ¹⁹⁸Bi, ²⁰²At; deduced levels, isomers, J, π, α-hindrance factors, configurations. Comparison with previous experimental values.

doi: 10.1103/PhysRevC.93.014319