Transition Probabilities in theA1Π–X1Σ+System of CS

Effects on spectroscopic properties for several low-lying electronic states of CS molecule by core–valence correlation and relativistic corrections

“…For each vibrational state of these low-lying electronic states, we have determined the vibrational level, initial rotation and centrifugal distortion constants when J = 0. We only tabulate the inertial rotation constant B t of the first 23 vibrational states in Table 4, since only the experimental data of B t can be found in the literature [9] to the best of our knowledge. To avoid congestion in Table 4, we omit the present B t results of the e 3 R À electronic state in this table.…”

“…On the one hand, a variety of astrophysical objects contain the CS, including carbon-rich stars [2,3], dense interstellar clouds [4,5], star-forming regions [6] and comets [7,8]; on the other hand, the molecule is one of the most abundant sulfur-containing species in interstellar clouds [1,2,5]. Because its emission and absorption features are suitable to detect the fluorescence emission from an excited photoproduct and measure the laser-induced fluorescence of ground-state population distributions [9], the molecule has been widely used to determine number densities, isotopic abundances and excitation conditions in these sources [10]. As we know, all these applications need the accurate spectroscopic parameters and molecular constants.…”

“…In experiment, the CS spectra have been extensively investigated in various wavelength regions from infrared (IR) to vacuum ultraviolet (UV) spectrum [1,[9][10][11][12][13][14][15][16][17][18][19][20][21]. Of these experiments, the pioneering one on the electronic spectrum was made by Crawford and Shurcliff [11] in 1934.…”

“…As we know, all these applications need the accurate spectroscopic parameters and molecular constants. For this reason, the spectroscopic and molecular properties of the molecule have received considerable attention in the past several decades, both experimentally [1,[9][10][11][12][13][14][15][16][17][18][19][20][21] and theoretically [22][23][24][25][26][27][28][29][30].…”

Commission 14: Atomic and Molecular Data: (Donnees Atomiques et Moleculaires)

“…Several bands of CH, CH + and their isotopomers have been analyzed (Bembenek 1997a,b;Bembenek, K §pa, & Rytel 1997, Zachwieja 1997, Kepa et al 1996. Mahon et al (1997) have determined transition probabilities in the A'll-X 1 ! ; 4 ' system of CS.…”