کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5428130 | 1508664 | 2015 | 4 صفحه PDF | دانلود رایگان |
- An empirical potential for first singlet Pi state of the KCs molecule was constructed.
- Fourier-Transform spectroscopy yielded term values with 0.01Â cmâ1 accuracy.
- Data set included vibrational levels up to v = 35 covering 85% of the potential well.
- The potential reproduces the fitted data with a standard deviation 0.94Â cmâ1.
- The empirical potential contains an inflection that reflects the avoided crossing.
The paper presents an empirical pointwise potential energy curve (PEC) of the extensively perturbed B(1)1Î state of the KCs molecule constructed by applying an Inverted Perturbation Approach routine. The experimental term values in the energy range E(vâ²,Jâ²)â[14071;15502]cmâ1 involved in the fit were based on Fourier-Transform spectroscopy data obtained with 0.01 cmâ1 accuracy from laser-induced B(1)1Î âX1Σ+ fluorescence spectra in the present work (654 term values) combined with 520 term values from Birzniece et al. (2012) . The data set included vibrational vâ²â[0,35] and rotational Jâ²â[7,233] quantum numbers covering about 85% of the potential well. The present fit reproduces the data included in the fit with a standard deviation 0.94 cmâ1. The empirical PEC contains an inflection at about R=4.1 à  that reflects the avoided crossing of two Ω=1 states corresponding to B(1)1Î and c(2)3Σ+ states as predicted by ab initio calculations.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 151, January 2015, Pages 1-4