Electric Resonance Spectrum of NaLi

摘要

Dgr; MJequals;plusmn; 1transitions from theJequals;1,MJequals;0 and theJequals;2,MJequals;0 molecular rotational states of23Na7Li have been observed by the molecular beam electric resonance method at 1ndash;15 MHz. With an experimental linewidth of 7.5 kHz, the nuclear hyperfine pattern consisted of six unresolved doublets. In the beam, originating from a supersonic source, only one vibrational state was observed, which was shown to be the ground vibrational state by measurement of a23Na6Li spectrum. The ground vibronic Stark coefficientmgr;02sol;B0and the molecular electric dipole moment mgr;0, the equilibrium dipole moment mgr;e, the molecular electric polarizabilities agr;sand agr;a, and the two nuclear electric quadrupole coupling constantseqQwere determined in23Na7Li (using the reported rotational constantB0equals;0.394thinsp;cmminus;1) to be:mgr;02sol;B0equals;2740plusmn; 5thinsp;Aring;3#agr;3equals;40plusmn; 5thinsp;Aring;3mgr;0equals;0.463plusmn; 0.002thinsp;Dagr;aequals;24plusmn; 2thinsp;Aring;3mgr;eequals;0.46 plusmn; 0.01thinsp;Dlpar;eqQrpar;Naequals;minus;749plusmn; 4thinsp;kHzverbar;lpar;eqQrpar;Liverbar;equals;28plusmn; 4thinsp;kHz.