CO2 laser saturation Stark spectra and global Stark analysis of carbonyl sulfide
1986; Elsevier BV; Volume: 119; Issue: 2 Linguagem: Inglês
10.1016/0022-2852(86)90023-8
ISSN1096-083X
AutoresJ. G. Lahaye, R. Vandenhaute, A. Fayt,
Tópico(s)Atmospheric chemistry and aerosols
ResumoStark spectra of OCS have been recorded with our intracavity CO2 laser spectrometer characterized by a high-frequency accuracy, a high sensitivity, and a broad electrical field range. The following transitions are reported: 0200 ← 0000, 0310 ← 0110, 1200 ← 1000, 0400 ← 0200, 0420 ← 0220, 1310 ← 1110, 0510 ← 0310, 0530 ← 0330, and 0220 ← 0000. A global weighted least-squares analysis has been applied simultaneously on all available zero field and Stark data of OCS. All off-diagonal terms of the Hamiltonian (l-type, anharmonic, Stark, and polarizability) are considered simultaneously and energy matrices are diagonalized in a one-step procedure. The important effect of anharmonic resonances on the effective dipole moments has been established and our analysis yields “free of resonance” electrical parameters for OCS. Our results and particularly the dipole moments in the 0000 and 0110 states can be considered as the best Stark standards available at the present time.
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