High-resolution emission spectroscopy of the A²¦°?span style='font-style: italic'>X²¦²⁺ system of AlH⁺

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• 作者：Wojciech Szajna  ; ;   ; ^{szajna@univ.rzeszow.pl} ; Mirosł ; aw Zachwieja
• 关键词：AlH⁺ ; A²¦°&ndash ; X²¦²⁺ transition ; Emission spectroscopy ; Electronic spectra ; Rotational analysis ; Anomalous ¦«-doubling
• 刊名：Journal of Molecular Spectroscopy
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：269
• 期：1
• 页码：56-60
• 全文大小：419 K

文摘

The emission spectrum of the A²¦°?i xmlns="""">X²¦²⁺ system of the AlH⁺ ion was investigated in the range of 27 000?9 000 cm^? by using a conventional spectroscopic technique. The AlH⁺ molecules were formed and excited in an aluminium hollow-cathode lamp with two anodes, filled with a mixture of Ne carried gas and a trace of NH₃. The emission from the discharge was observed with a plane grating spectrograph and recorded by a photomultiplier tube. The full rotational structure of the 0-0 and 1-1 bands has been observed for the first time (12 branches up to J?= 36.5) and many new constants of the X²¦²⁺ state have been derived from the analysis. For the A²¦°, v = 0 and 1 state a considerable irregularities of the ¦«-doubling have been observed. The most reasonable explanation for this anomaly is an interaction with unstableness rotational levels of X²¦²⁺ state and perturbing of the A²¦° state by the nearly lyingB²¦²⁺ state.