Isotope shifts and hyperfine structure of the4s2S01

Abstract

Isotope shifts and hyperfine structure splittings of the CaI resonance line (4s 'So-4s4p 'P~, A, =422.7 nm) have been measured for all calcium isotopes between Ca and Ca, including the short-lived isotope Ca (T~~2 --4.54 d). Resonance fluorescence was observed in a well-collimated atomic beam of calcium excited by a narrow band tunable continuous-wave dye laser. Combining the result with muonic x-ray data for the stable isotopes, accurate values for the changes of mean square charge radii of the Ca nuclei are obtained, in addition to information on electromagnetic moments from the measured hyperfine structure constants, The influence of ground state correlations (represented by quadrupole and octupole mean square deformations) on the observed peculiar variation of the Ca charge radii is discussed as well as the relation to the droplet model and to a mixed (f7/2)" model. NUCLEAR STRUCTURE Isotope shifts and hyperfine structure of Ca isotopes, 3=40 to 48, measured by laser spectroscopy, deduced 5(r ) and nuclear moments.

Shell structure of potassium isotopes deduced from their magnetic moments

“…For the empirical values of unpaired protons, results from Table III were used. The g factors for the odd neutrons were taken from the corresponding Ca isotones [56][57][58][59]. The obtained results with the list of isotopes used for different configurations are presented in Table VI. TABLE VI.…”

Isotope shift of182Hg and an update of nuclear moments and charge radii in the isotope range181Hg-206Hg

“…Andl et al [60] discussed ground state correlations due to octupole vibrations and their influence on the variation of the charge radii of Ca isotopes. A deformation parameter f13 =0.076 for 2~ has been deduced by Baxter et al [61] from an e-scattering experiment.…”

Ab-initio calculations of pair-correlation effects on the hyperfine structure of the 4s 4p and 4s 3d configurations of Ca

“…No experimental results on this state are available yet but accurate many-body calculations have recently been performed [6]. Laser-spectroscopic measurements have also recently been performed by Andl et al on * Present address: Department of Physics, University of Virginia, Charlottesville, VA 22901, USA the short-lived 4s4p 1p~ state for a number of isotopes [7], although the uncertainties appear to be underestimated. Since the nuclear magnetic dipole moment of 43Ca is known from direct measurements [8], the magnetic hyperfine structure can be used to test the theoretical calculations.…”