Study Of Limg And Limg⁺ Using Laser Induced Fluorescence And Two-photon Ionization

Persinger, Thomas D.

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https://hdl.handle.net/2142/111385 Copy

Description

Title

Study Of Limg And Limg⁺ Using Laser Induced Fluorescence And Two-photon Ionization

Author(s)

Persinger, Thomas D.

Contributor(s)

• Heaven, Michael
• Han, Jiande

Issue Date

2021-06-24

Keyword(s)

Electronic structure, potential energy surfaces

Abstract

Heterodimers consisting of an alkaline and alkaline-earth metal, such as LiMg have the potential for being laser cooled to ultra-cold temperatures. The X1$^{2}\Sigma^{+}$ ground state of LiMg allows manipulation by both magnetic and electric fields, and its non-zero dipole moment offers the possibility that it could be used in quantum computing devices. Current experimental data on LiMg and LiMg$^{+}$ are sparse$^{1,2}$. In the present study we used resonance enhanced two-photon ionization spectroscopy (RE2PI) and laser induced fluorescence (LIF) to record rotationally resolved spectra of the X1$^{2}\Sigma^{+}$, 2$^{2}\Pi$ and 3$^{2}\Sigma^{+}$ states. Near-UV spectra previously assigned as E-X and F-X transitions were also reevaluated. Vibrationally resolved spectra of the X1$^{2}\Sigma^{+}$ and 1$^{2}\Pi$ state were observed using dispersed LIF. Pulsed-field ionization - zero kinetic energy photoelectron spectroscopy (PFI-ZEKE) was used to determine the ionization energy (IE) and the low-energy states of LiMg$^{+}$. An IE of 4.7695(4) eV for LiMg was found, and vibrationally resolved spectra yielded molecular constants for LiMg$^{+}$ that were consistent with a substantial strengthening of the bond upon ionization. 1. Berry, K.R. and Duncan, M.A., (1997) Photoionization spectroscopy of LiMg. Chem. Phys. Lett., 279, 44-49 2. Pichler, G., Lyyra, A.M., Kleiber, P.D., Stwalley, W.C., Hammer, R., Sando, K.M., and Michels, H.H., (1989) Laser-induced chemiluminescence of the lithium-magnesium (LiMg) excimer. Chem. Phys. Lett., 156, 467-71

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111385

DOI

10.15278/isms.2021.RL10

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