REINVESTIGATION OF THE COMET-TAIL $(A^{2}\Pi_{i}-X^{2}\Sigma^{+})$ SYSTEM OF $^{12}C^{16}O^{-}$

Haridass, C.; Reddy, S. Paddi

REINVESTIGATION OF THE COMET-TAIL $(A^{2}\Pi_{i}-X^{2}\Sigma^{+})$ SYSTEM OF $^{12}C^{16}O^{-}$

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1997-TG-14.jpg (122 KB)

Date

1997

Authors

Haridass, C.

Reddy, S. Paddi

Publisher

Ohio State University

Abstract

The emission spectrum of the $A 2 Π i − X 2 Σ +$ system of $12 C 16 O +$ produced in the cathode glow of a hollow cathode discharge tube of special $d e s i g n 1$ and photographed in the spectral region 3345-8500 {\AA} at high $r e s o l u t i o n 2$ was reinvestigated. Detailed rotational analysis of ten bands involving five vibrational levels $v =0$ to 4 of each of the A and X states was carried out. Spin-splitting of the rotational levels was observed for the analyzed bands. The observed intensity distribution of the branches is found to be in good agreement with theoretical calculations. Rotational constants for both the A and X states were obtained from a global fit of the present data of the A-X system and the infrared and microwave data available from the literature. The Fortrat diagram for the 0-2 band confirms that the $A 2 Π i$ state changes from Hurd’s case (a) at lower J values to Hund’s case (b) at higher J values.

Description

$1$ S. P. Reddy and C.V.V. Prasad, J. Phys. E. Sci. Instrum. 22, 1972 (1989). $2$ C. Haridass, C. V.V. Prasad and S.P. Reddy, Astrophys. J. 338, 669 (1992).

Author Institution: Department of Physics and Physical Oceanography, Memorial University of Newfoundland

URI

http://hdl.handle.net/1811/14101

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1990-1999

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