科研之友
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摘要
The Fourier transform spectrometer with resolution of 0.03 cm(-1) was applied to disperse the diode laser induced B(1)(1)Pi -> X-1 Sigma(+) fluorescence spectra of the RbCs molecule in a heat pipe. The presence of buffer gas (Ar) produced in the spectra the dense pattern of collision-induced rotation relaxation lines, thus enlarging the B(1)(1)Pi data set, allowing to determine the Lambda-splitting constants and to reveal numerous local perturbations. In total, 2664 term values for (RbCs)-Rb-85-Cs-133 and (RbCs)-Rb-87-Cs-133 in the energy range from 13 770 to 15 200 cm(-1) were obtained with accuracy about 0.01 cm(-1). A pointwise potential energy curve (PEC) based on inverted perturbation approach was constructed in the R-range from 3.35 to 9.00 angstrom for less perturbed vibrational levels nu' is an element of [0, 35] and compared with ab initio calculations. The data included in the fit were reproduced by present PEC with standard deviation (sd) 0.95 cm(-1). More systematic over rotational levels J' is an element of [6, 228] data set was obtained for nu' is an element of [0, 2]. These data were reproduced by the obtained PEC with sd of 0.08 cm(-1). The energy of PEC's minimum T-e = 13 746.65 cm(-1), as well as other main molecular constants were determined.
- 出版日期2013-4-21
