Hyperfine Constants and Tensor Polarizabilities of 4f 6 6s 6p 9G0–6 States in Sm I

Hyperfine structures, isotope shifts and Stark effects of seven near-infrared transitions in Sm I are investigated by means of atomic-beam laser spectroscopy with fluorescence detection. E 1 transitions from the ground-term 7 F 1–6 states of the 4 f 6 6 s 2 configuration to 9 G 0–6 states of the 4 f 6 6 s 6 p configuration are measured. The 9 G 1,2,3 states are promising candidates for measuring the parity nonconserving effects in Sm. Hyperfine constants A and B for odd-mass isotopes of 147 Sm and 149 Sm are newly determined for the six upper states studied. Isotope shifts of the transitions are determined, and specific mass shift and field shift are also obtained by King-plot analysis. Stark splittings are resolved for three transitions and tensor polarizabilities of the upper states are determined.