HYPERFINE-STRUCTURE CONSTANTS OF THE CAII STATES 4SS-2(1/2) AND 4PP-2(1/2, 3/2) AND THE NUCLEAR-QUADRUPOLE MOMENT OF CA-43

The hyperfine structure splittings of the 4s2S1/2-->4p2P1/2,3/2 transitions in (CaII)-Ca-43 have been measured by fast ion beam collinear laser spectroscopy. The resonant laser interaction was observed using non-optical detection based on optical ground state depopulation pumping, state selective neutralization and charge state separated particle counting. The extracted magnetic dipole hyperfine structure constants for Ca-43 A (2S1/2) = -805(2) MHz, A (2P1/2) = -145.5(1.0) MHz and A (2P3/2) = -31.9(0.2) MHz are in excellent agreement with relativistic many body perturbation theory predictions available for this alkali-like ion. The combined results are used to evaluate the semi-empirical analysis method. From the electrical quadrupole hyperfine structure constant B(2P3/2) = -6.7(1.4) MHz and the calculated B/Q value for this one valence electron configuration, the nuclear quadrupole moment Q (Ca-43) = -0.043(9)b is derived. This result supports a previous evaluation based on the hyperfine structure of the two valence electron P3 configurations of CaI.