Angström system of the13C18O molecule

First Analysis of the 1–v″ Progression of the Ångström (B1Σ+–A1Π) Band System in the Rare 13C17O Isotopologue

“…Next, on the basis of the derived Δ G 1/2 value for the B 1 Σ + state and using all of its already known values for the 12 C 16 O, 13 C 16 O, 12 C 18 O, 14 C 16 O, 13 C 18 O, and 14 C 18 O isotopologues, by means of the weighted least-squares method, the ω e and ω e x e constants for the B 1 Σ + Rydberg state were calculated. Additional vibrational data published by Kępa et al in the A 1 Π state of 13 C 16 O, recalculated by means of the standard isotopic relations to the 13 C 17 O molecule, were used.…”

“…Far fewer studies on the A 1 Π state have been carried out in other isotopologues of the CO molecule. − ,− ,,,− What is worth noticing is the fact that observations and analyses of the perturbations of the A 1 Π state in isotopologues of the CO molecule allow confirmation of the accuracy of the previous theoretical analyses and verification of the quality of determined molecular constants of interacting states.…”

“…The B 1 Σ + Rydberg state, taking part in different rovibronic transitions within the energetic structure of carbon monoxide, has been the subject of preliminary and more advanced experimental analyses in the ordinary 12 C 16 O molecule, using conventional as well as laser methods. − Far fewer experimental studies have been carried out taking into account this state in other CO isotopologues. ,,− The above-mentioned publications also indicate that only the v = 0, 1 vibrational levels are involved in emission from the B 1 Σ + state, whereas, the remaining existing vibrational levels take part only in absorption transitions: B 1 Σ + ( v = 2), B 1 Σ + ( v = 3), together with the recently analyzed B 1 Σ + ( v = 6) state, recorded in the 6–0 band of the transition from the X 1 Σ + ground state of the following isotopologues: 12 C 16 O, 13 C 16 O, and 13 C 18 O by Eidelsberg et al As regards the analysis of B 1 Σ + state in the very rare 12 C 17 O and 13 C 17 O isotopologues, pioneering and experimental works have been recently published by Hakalla et al for the 13 C 17 O molecule and by Hakalla et al for the 12 C 17 O molecule.…”

“…The B 1 Σ + –A 1 Π band system was the subject of many studies for the 12 C 16 O molecule beginning with its discovery by Ångström, as well as in other works. − Far fewer discoveries accompanied this system in other isotopologues of the CO molecule, such as: 12 C 18 O, , 13 C 16 O, − 13 C 18 O, ,, 14 C 16 O, , and 14 C 18 O . However, when it comes to the studies that concern this system in the rarest, natural isotopologues of carbon monoxide, there are only those conducted by Hakalla et al and by Hakalla et al for the 12 C 17 O and 13 C 17 O molecules, respectively.…”

Precision spectroscopy and comprehensive analysis of perturbations in the A1∏(v= 0) state of13C18O

“…Haridass and coworkers have performed detailed studies of A 1 Π(v = 0) by VUV emission, revealing perturbation effects from the a 3 Σ + (v = 10) and d 3 ∆(v = 5) levels [18,19]. Emission studies of the Ångström (B 1 Σ + − A 1 Π) bands of 13 C 18 O [20,21] provided further information on the A 1 Π(v = 0) level, and the study of the Herzberg (C 1 Σ + −A 1 Π) systems [22,23] also provided detailed information on the interaction with the e 3 Σ − (v = 1) level. The A 1 Π − X 1 Σ + system was reinvestigated recently with the FT-VUV spectrometer at the SOLEIL synchrotron [24], focusing on the determination of term values and line strength parameters.…”