David Rahmlow

Molecular-beam optical Stark and Zeeman study of the A {sup 2}{Pi}--X {sup 2}{Sigma}{sup +} (0,0) band system of BaF

The A {sup 2}{Pi}-X {sup 2}{Sigma}{sup +} (0,0) band system of barium monofluoride (BaF) has been recorded using high-resolution laser-induced fluorescence spectroscopy both field-free and in the presence of static magnetic and electric fields. The field-free spectra for the {sup 135}BaF, {sup 137}BaF, and {sup 138}BaF isotopologues were modeled to generate an improved set of spectroscopic constants for the A {sup 2}{Pi}({upsilon} = 0) and X {sup 2}{Sigma}{sup +}({upsilon} = 0) states. The observed optical Stark shifts for the {sup 138}BaF isotopologue were analyzed to produce the permanent electric dipole moments of 1.50(2) and 1.31(2) D for the A {sup 2}{Pi}{sub 1/2}({upsilon} = 0) and A {sup 2}{Pi}{sub 3/2} ({upsilon} = 0) states, respectively. The observed optical Zeeman shifts for the {sup 138}BaF isotopologue were analyzed to produce a set of magnetic g factors for the A {sup 2}{Pi}({upsilon} = 0) and X {sup 2}{Sigma}{sup +}({upsilon} = 0) states.