Terahertz Spectroscopy Of Cah

Kobayashi, Kaori

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https://hdl.handle.net/2142/116695 Copy

Description

Title

Terahertz Spectroscopy Of Cah

Author(s)

Kobayashi, Kaori

Contributor(s)

• Ozeki, Hiroyuki
• Moriwaki, Yoshiki
• Matsushima, Fusakazu
• Sumi, Tatsuki
• Suzuki, Shota

Issue Date

2022-06-23

Keyword(s)

Metal containing

Abstract

Calcium monohydride CaH is an astronomical molecule identified in the Sun and other stars by using the visible transitions. We have found many new vibrational levels of the A$^2\Pi$, B/B$'$$^2\Sigma^+$, and 1$^2\Delta$ state using laser induced fluorescence (LIF) from visible to ultraviolet region. \footnote{K. Watanabe, N. Yoneyama, K. Uchida, K. Kobayashi, F. Matsushima, Y. Moriwaki, S. C. Ross, \textit{Chem. Phys. Lett.} \underline{\textbf{657}}, 1 (2016).}$^,$ \footnote{K. Watanabe, I. Tani, K. Kobayashi, Y. Moriwaki, S. C. Ross, \textit{Chem. Phys. Lett.} \underline{\textbf{710}}, 11 (2018).} \footnote{J. Furuta, K. Watanabe, I. Tani, K. Kobayashi, Y. Moriwaki, S. C. Ross, \textit{International Symposium on Molecular Spectroscopy, 74th meeting,} \underline{\textbf{TI06}}, (2019).} \footnote{S. Yaguramaki, J. Furuta, I. Tani, K. Kobayashi, Y. Moriwaki, S. C. Ross, \textit{The 2021 International Symposium on Molecular Spectroscopy,} \underline{\textbf{WM11}}, (2021).} The pure rotational spectra of the ground state have been measured and analyzed, including the hyperfine structure. \footnote{ C. I. Frum, J. J. Oh, E. A. Cohen, H. M. Pickett, \textit{Astrophys. J. Lett.} \underline{\textbf{408}}, L61 (1993).}$^,$\footnote{W. L. Barclay Jr., M. A. Anderson, L. M. Ziurys, \textit{Astrophys. J. Lett.} \underline{\textbf{408}}, L65 (1993).} However, the $N$ range was limited to $N = 2-1$ and the highest frequency was about 500 GHz. In this study, we will report our new measurement in the terahertz region. The terahertz spectra were taken by using tunable far-infrared spectrometer at University of Toyama. Calcium monohydride was produced in a quartz cell where Ca vapor was introduced by heating Ca at 750$^\circ$C and DC discharge was applied under H$_2$ and He (or Ar) gas environment. The highest frequencies of the ground state and vibrationally excited state are approximately 3.7 THz and 1.9 THz, respectively.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116695&&

DOI

https://doi.org/10.15278/isms.2022.RK06

Copyright and License Information

Copyright 2022 held by the authors

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