Experimental determination of the dipole moments of the X(²Σ⁺) and B(²Σ⁺) states of the CN molecule

From observation of the electronic emission spectrum in high electric fields, the dipole moments of the X( 2 Σ + ) and B( 2 Σ + ) states of the CN molecule have been determined to be 1.45 ± 0.08 and 1.15 ± 0.08 debye, respectively. The relative signs of the dipole moments in these two states are shown to be opposite.