The paper presents experimentally obtained permanent electric dipole moment values (µ) in electronically excited B 1Pi and D 1Pi states of 23Na85Rb and 23Na87Rb isotopomer molecules for a number of vibrational and rotational levels (v[prime],J[prime]). The method is based on measuring relative intensities of "forbidden" fluorescence lines appearing due to dc Stark effect induced e/f parity mixing for a particular (v[prime],J[prime])-level, combined with electric radio frequency-optical double resonance measurement of Lambda-splitting energy Deltae,f. The measured D 1Pi state µ values are close to 6 D, representing minor changes with the vibrational level v[prime] varying from 0 to 12 and J[prime] in the region between 7 and 50, while the measured B 1Pi state µ values are about 3 D for v[prime] = 4, 5 and 6. The X 1Sigma+, B 1Pi, and D 1Pi dipole moment functions µ(R) are calculated ab initio using the many body multipartitioning perturbation theory for explicit treatment of core-valence correlations. The theoretical and experimental dipole moment estimates are in a perfect agreement for the ground state and the D 1Pi state, differing by 15%-25% for the B 1Pi state.
Permanent electric dipoles in B1Pi and D1Pi states of NaRb: experiment and theory
CIMIRAGLIA, Renzo
2000
Abstract
The paper presents experimentally obtained permanent electric dipole moment values (µ) in electronically excited B 1Pi and D 1Pi states of 23Na85Rb and 23Na87Rb isotopomer molecules for a number of vibrational and rotational levels (v[prime],J[prime]). The method is based on measuring relative intensities of "forbidden" fluorescence lines appearing due to dc Stark effect induced e/f parity mixing for a particular (v[prime],J[prime])-level, combined with electric radio frequency-optical double resonance measurement of Lambda-splitting energy Deltae,f. The measured D 1Pi state µ values are close to 6 D, representing minor changes with the vibrational level v[prime] varying from 0 to 12 and J[prime] in the region between 7 and 50, while the measured B 1Pi state µ values are about 3 D for v[prime] = 4, 5 and 6. The X 1Sigma+, B 1Pi, and D 1Pi dipole moment functions µ(R) are calculated ab initio using the many body multipartitioning perturbation theory for explicit treatment of core-valence correlations. The theoretical and experimental dipole moment estimates are in a perfect agreement for the ground state and the D 1Pi state, differing by 15%-25% for the B 1Pi state.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
