THE PURE ROTATIONAL SPECTRUM OF THE SiP RADICAL (X2Πi)

Burton, Mark

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https://hdl.handle.net/2142/107530 Copy

Description

Title

THE PURE ROTATIONAL SPECTRUM OF THE SiP RADICAL (X2Πi)

Author(s)

Burton, Mark

Contributor(s)

Ziurys, Lucy M.; Sheridan, Phillip M.

Issue Date

23-Jun-20

Keyword(s)

Astronomy

Abstract

The millimeter-wave spectrum of the SiP radical in its X$^{2}$$\Pi$$_{i}$ ground electronic state has been recorded using direct absorption spectroscopy in the frequency range 151 – 532 GHz. The species was synthesized in an AC discharge by the reaction of SiH$_{4}$ and red phosphorous, in argon carrier gas. Both lambda-doubling and hyperfine splittings, from the phosphorus nuclear spin (\textit{I} = 1/2), were observed in both spin-orbit ladders, $\Omega$ = 3/2 and 1/2. The $\Omega$ =1/2 ladder appears to be perturbed, presumably by the nearby A$^{2}$$\Sigma$ state, as suggested by previous optical data. The data were analyzed with a Hund’s case (a) Hamiltonian, establishing global spectroscopic constants. A deperturbation analysis was also conducted, further refining the $\Pi$-$\Sigma$ interaction.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

English

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http://hdl.handle.net/2142/107530

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