Atomic parameters for the 2p53p 2[3/2]2-2p53s 2[3/2]2o transition of Ne I relevant in nuclear physics

We calculated the magnetic dipole hyperfine interaction constants and the electric field gradients of 2p(5)3p(2)[3/2](2) and 2p(5)3s(2)[3/2](2)(o) levels of Ne I by using the multiconfiguration Dirac-Hartree-Fock method. The electronic factors contributing to the isotope shifts were also estimated for the lambda = 614.5 nm transition connecting these two states. Electron correlation and relativistic effects including the Breit interaction were investigated in detail. Combining with recent measurements, we extracted the nuclear quadrupole moment values for Ne-20 and Ne-23 with a smaller uncertainty than the current available data. Isotope shifts in the 2p(5)3p(2)[3/2] -2p(5)3s(2)[3/2](2)(o) transition based on the present calculated field-and mass-shift parameters are in good agreement with the experimental values. However, the field shifts in this transition are two or three orders of magnitude smaller than the mass shifts, making rather difficult to deduce changes in nuclear-charge mean-square radii. According to our theoretical predictions, we suggest using instead transitions connecting levels arising from the 2p(5)3s configuration to the ground state, for which the normal mass shift and specific mass shift contributions counteract each other, producing relatively small mass shifts that are only one order of magnitude larger than relatively large field shifts, especially for the 2p(5)3s(2)[1/2](1)(o) - 2p(61)S(0) transition.