Hyperfine structure constants of the CaII states 4s 2 S 1/2 and 4p 2 P 1/2, 3/2 and the nuclear quadrupole moment of43Ca

Abstract

Atoms, Moleculeszoi,.oh., and Clusters fi~r Physik D © Springer-Verlag 199t Hyperfine structure constants of the Call states 4s 2S1/z and 4p 2p and the nuclear quadrupole moment of 3Ca 1/2, 3/2 R.E. Silverans ~, L. Vermeeren ~, R. Neugart 2, P. Lievens 3., and the ISOLDE Collaboration 3Abstract. The hyperfine structure splittings of the 4s2S~/a--,4pZP~/;,3/2 transitions in 43CaII have been measured by fast ion beam collinear laser spectroscopy. The resonant laser interaction was observed using nonoptical 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 43Ca 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 ['or 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 (43Ca) = -0.043(9)b is derived. This result supports a previous evaluation based on the hyperfine structure of the two valence electron 3p configurations of CaI.

Diverse trends of electron correlation effects for properties with different radial and angular factors in an atomic system: a case study in Ca+

“…[50] is multiplied with our calculations. Considering Q nuc = 0.0444(6)b, we are able to produce B hf of the 4p 2 P 3/2 state as −6.693 MHz, which is very close to the previously reported experimental value as −6.7(1.4) MHz [49] and differ significantly from the latest measured value −4.2(1.3) MHz [50]. Nevertheless, we get results agreeing within the error bars of the other experimental results in all the three states.…”

“…The correlation trend in this state is also similar with the 4p 2 P 3/2 and 3d 2 D 3/2 states. We have compared our calculated results with the available most precise measurements [47][48][49][50]. We have quoted here two experimental values for the 4p 2 P 3/2 state.…”

“…Methods quoted in the x-axis are with arbitrary unit. [47][48][49][50]. We have quoted here two experimental values for the p P 4 2 3 2 state.…”

Doppler free “dark resonances” for hyperfine measurements and isotope shifts in Ca+ isotopes in a Paul trap

“…These calculations include pair correlation to high order, with the later calculation [7] including more pair excitations and more iterations, made possible by the development of workstations. Table 1 also gives a comparison with other available experimental and theoretical data [8][9][10].…”

Blackbody radiation shift, multipole polarizabilities, oscillator strengths, lifetimes, hyperfine constants, and excitation energies in Ca+

“…Additional correlation contributions were added to the method used in [47] by Mårtensson-Pendrill et al [49] to recalculate all of the above magnetic-dipole hyperfine constants. The hyperfine structure splittings of the 4s, 4p 1/2 , and 4p 3/2 levels in 43 Ca II were measured by fast ion beam collinear laser spectroscopy in [50]. Precise determination of the 4s ground state hyperfine structure splitting of 43 Ca + (3225.6082864(3)MHz) was reported by Arbes et al [51].…”