Emission Spectroscopy of AlH: the X¹Σ⁺, A¹Π and C¹Σ⁺ States Characteristics

• Authors: W. Szajna , M. Zachwieja , R. Hakalla , R. Kępa
• Languages of publication: EN

Abstracts

EN

The visible spectrum of AlH has been investigated at high resolution between 20000 and 21500 cm^{-1} 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 NH_3. The emission from the discharge was observed with a plane grating spectrograph and recorded by a photomultiplier tube. The 0-0 and 1-1 bands of the C¹Σ⁺-A¹Π system and 0-2 band of the A¹Π-X¹Σ⁺ were identified at 21126, 21368 and 20276 cm^{-1}, respectively. In total 121 transition wave numbers belonging to three bands were precisely measured (with accuracy of ±0.003 cm^{-1}) and rotationally analysed. The new data were elaborated with the help of recent X¹Σ⁺ state parameters reported by White et al. and of the C¹Σ⁺, A¹Π states constants reported by Szajna and Zachwieja. As a result of this merged analysis the set of the molecular parameters and rotational terms values for the three lower lying states of the AlH molecule have been significantly improved.

Keywords

EN

33.20.Kf; 33.20.Vq

Discipline

• 33.20.Vq: Vibration-rotation analysis
• 33.20.Kf: Visible spectra

• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 3
• Pages: 417-423

Dates

published

2011-09

received

2010-11-25

(unknown)

2011-03-11

Contributors

author

W. Szajna

• Atomic and Molecular Physics Laboratory, Institute of Physics, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

M. Zachwieja

• Atomic and Molecular Physics Laboratory, Institute of Physics, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

R. Hakalla

• Atomic and Molecular Physics Laboratory, Institute of Physics, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

R. Kępa

• Atomic and Molecular Physics Laboratory, Institute of Physics, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

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Identifiers

DOI

10.12693/APhysPolA.120.417