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Hyperfine interactions of Na isotopes in single crystals have been studied using highly nuclear polarized 20,21,26,27,28Na beams provided by ISAC/TRIUMF. The degree of polarization kept in the crystals, the spin-lattice relaxation times, the electric quadrupole coupling constants and the initial distribution of the populations were measured. Such knowledge is indispensable for the application of the hyperfine interactions in the study of precision measurements such as the nuclear structure through nuclear moments and the fundamental symmetries. [ABSTRACT FROM AUTHOR]

Abstract: The feasibility of in-beam polarization of nuclear spin in F+ beams was studied. It was demonstrated that metastable atomic fluorine could be optically pumped on the closed transition (3s 4P5/2→3p 4D7/2) at 686nm. The metastable production efficiency in sodium vapor was measured using optical depopulation pumping of the metastable on the (3s 4P5/2→3p 4D5/2) transition at 678nm. At low helium density, 0.24 (+0.16/−0.03) of the reionized beam was derived from metastables, implying an ion beam polarization of 24% would be feasible if the metastables were fully polarized. The hyperfine structures of the 3s 4P5/2, 3p 4D5/2 and 3p 4D7/2 states in 19F were measured via laser-induced fluorescence and modulated optical depopulation pumping. Based on these results, a scheme is suggested for polarizing 20F. [Copyright &y& Elsevier]

Abstract: We have measured the isotope shift between 41K and 39K in the 4s1/2 →5p1/2 transition at 405nm using saturation spectroscopy. Our measured isotope shift is 456.1±0.8MHz, implying a residual isotope shift (sum of specific mass shift and field shift) of −52.7±0.8MHz. We deduce a specific mass shift of −40±5MHz, which would imply that the 5p1/2 state has a considerably larger specific mass shift than the 4p1/2 state. We have in addition measured the 5p1/2 hyperfine splitting for 41K. [Copyright &y& Elsevier]