High-resolution laser spectroscopy of the A 3Π1 ← X 1Σ+ system of ICl IN 0.7 μm region

Nishimiya, Nobuo

Permalink

https://hdl.handle.net/2142/79255 Copy

Description

Title

High-resolution laser spectroscopy of the A 3Π1 ← X 1Σ+ system of ICl IN 0.7 μm region

Author(s)

Nishimiya, Nobuo

Contributor(s)

• Le Roy, Robert J.
• Suzuki, Masao
• Yukiya, Tokio

Issue Date

22-Jun-15

Keyword(s)

Small molecules

Abstract

Spectroscopic data for the $A,^{3}Pi_{1}$ and $X,^{1}Sigma^{+}$ states of I$^{35/37}$Cl have been obtained by many researchers using grating spectrometers and Fourier-transform infrared spectrometers.footnote{,J.A. Coxon, R.M. Gordon and M.A. Wickramaaratchi, J. Mol. Spectr. {bf 79} (1983) 363, 380.}$^,$footnote{,H. Hedderich P.F. Bernath and G.A. McRae J. Mol. Spectr. {bf 155} (1992) 384.} In a previous paperfootnote{,T.Yukiya, N. Nishimiya and M. Suzuki, J. Mol. Spectr. {bf 269} (2011) 193.} we reported the measurement of doppler limited electronic vib-rotational absorption lines of the $A,^{3}Pi_{1}$ $leftarrow$ $X,^{1}Sigma^{+}$ system of I$^{35/37}$Cl using a source modulation method, and new Mass-reduced Dunham coefficients were reported for the $X$-state. However, it is becoming increasingly common to analyse diatomic molecule spectroscopic data using the ``direct-potential-fit'' (DPF) method in which observed transition energies are fitted to simulated spectra generated from analyic models for the potential energy function(s). This method tends to require fewer fitting parameters than traditional Dunham analyses, as well as having more robust extrapolation properties in both the $v$ and $J$ domains. The present work combines all available previously reported data for the $A,^{3}Pi_{1}$ and $X,^{1}Sigma^{+}$ states with new measurements up to $v'=10$ in the 0.7$murm m$ region obtained with a tone burst method using a Ti:Sapphire Ring Laser (M Squared Ltd SolsTis CW with Tera scan) in the the first DPF analysis reported for this system. The results of this study and our new fully analytic potential energy functions for the $A,^{3}Pi_{1}$ and $X,^{1}Sigma^{+}$ states of ICl will be presented.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/79255

Owning Collections