Rotational analysis of the 脜ngstr枚m system (B¹危⁺-A¹螤) in the rare ¹³C¹⁷O isotopologue

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• 作者：Rafa艂 Hakalla ; ^{hakalla@univ.rzeszow.pl} ; Miros艂aw Zachwieja
• 关键词：Carbon monoxide ; CO ; Rare 13C17O ; Isotopologue ; Å ; ngströ ; m system ; Rydberg state ; Perturbations in CO
• 刊名：Journal of Molecular Spectroscopy
• 出版年：2012
• 期刊代码：129_00222852
• 类别：ch
• 出版时间：February, 2012
• 卷：272
• 期：1
• 页码：11-18
• 文件大小：761 K

摘要

Although yet unobserved in the very rare ¹³C¹⁷O isotopologue, the 脜ngstr枚m system (B¹危⁺-A¹螤) was obtained under high resolution as an emission spectrum using a conventional spectroscopic technique.

The emission from the discharge was observed with a plane grating spectrograph and recorded by a photomultiplier tube. In total, 192 transition wave numbers belonging to two bands (0-1 and 0-2) were precisely measured and rotationally analyzed. This method allowed us to determine the merged rotational constants B₀ = 1.8131941(58) cm^鈭? and D₀ = 5.5620(46) 脳 10^鈭? cm^鈭? and the individual molecular constant B₁ = 1.471059(47) cm^鈭?, D₁ = 5.315(64) 脳 10^鈭? cm^鈭?, B₂ = 1.451762(13) cm^鈭?, D₂ = 7.812(16) 脳 10^鈭? cm^鈭? for the as yet unanalyzed ¹³C¹⁷O molecule B¹危⁺ and A¹螤 states, respectively. The band origins of the 脜ngstr枚m system in the ¹³C¹⁷O molecule were also calculated.

Numerous rotational perturbations observed in the A¹螤 state in ¹³C¹⁷O molecule have been identified and analyzed in detail. The suspected candidates responsible for these irregularities were indicated by means of a graph of the rovibronic levels of the neighboring states based on the estimated term value in the ¹³C¹⁷O molecule. The values of these perturbations have also been defined for both the e- and f-parity of the A¹螤(v = 1 and 2) state. Simultaneously, the B¹危⁺ state was observed to be quite regular up to the observed J_max level.