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• W4213022312 abstract "<sec>The electronic structure of the X²Σ⁺, A²Π, B²Σ⁺, 3²Σ⁺, and 2²Π state of LiCl^– anion are performed at an MRCI+Q level. Davison correction, core-valence correction and spin-orbit coupling effect are also considered. The ground state X²Σ⁺ of LiCl^– anion correlates with the lowest dissociation channel Li(²S_g) + Cl^–(¹S_g); the A²∏ state and B²Σ⁺ state correlate with the second dissociation channel Li(²P_u) + Cl^–(¹S_g); the 3²Σ⁺ state and 2²Π state correlate with the third dissociation channel Li^–(¹S_g) + Cl^–(²P_u).</sec><sec>Spectroscopic parameters are calculated by solving the radial Schröedinger equation. The equilibrium internuclear distance <i>R</i>_e of the ground state X²Σ⁺ is 2.1352 Å, which is a little bigger than the experimental datum, with an error being 0.5%. It is a deep potential well, and the dissociation energy <i>D</i>_e is 1.886 eV. These values are in good agreement with experimental data. The A²∏ state is at 13431.93 cm^–1 above the X²Σ⁺ state. The <i>R</i>_e is 2.1198 Å, which is only 0.0154 Å smaller than that of the X²Σ⁺ state. The values of energy level <i>G</i>_ν and rotational constant <i>B</i><i>_ν</i> of five Λ-S states are also calculated. The values are in good agreement with available theoretical ones. The electronic structures of the excited states are also reported. The SOC effect weakly influences the spectroscopic parameters for the <inline-formula><tex-math id=M1>begin{document}$ {text{X}}{}^2Sigma _{1/2}^ + $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M1.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M1.png/></alternatives></inline-formula>, <inline-formula><tex-math id=M2>begin{document}$ {text{A}}{}^2{Pi _{1/2}} $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M2.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M2.png/></alternatives></inline-formula>, <inline-formula><tex-math id=M3>begin{document}$ {text{A}}{}^2{Pi _{3/2}} $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M3.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M3.png/></alternatives></inline-formula>, and <inline-formula><tex-math id=M4>begin{document}$ {text{B}}{}^2Sigma _{1/2}^ + $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M4.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_M4.png/></alternatives></inline-formula> state. From the analysis of the SO matrix, it can be seen that the SOC effect plays a little role in realizing the A²Π <inline-formula><tex-math id=Z-20220220164508>begin{document}$leftrightarrow $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164508.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164508.png/></alternatives></inline-formula> X²Σ⁺ transition, so, it can be ignored.</sec><sec>The scheme of laser cooling of LiCl^– anion has constructed at a spin – free level. The A²∏(<i>ν</i><i>′</i>) <inline-formula><tex-math id=Z-20220220164513>begin{document}$leftrightarrow $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164513.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164513.png/></alternatives></inline-formula> X²Σ⁺(<inline-formula><tex-math id=Z-20220220164757>begin{document}$v'' $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164757.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164757.png/></alternatives></inline-formula>) transition has a highly diagonally distributed Franck-Condon factor <i>f</i>₀₀ = 0.9898, the calculated branching ratio of the diagonal term <i>R</i>₀₀ is 0.9893, and spontaneous radiative lifetime of A²∏ is 35.45 ns. A main pump laser and two repumping lasers for driving the A²∏(<i>ν</i><i>′</i>) <inline-formula><tex-math id=Z-20220220164518>begin{document}$leftrightarrow $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164518.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164518.png/></alternatives></inline-formula> X²Σ⁺(<inline-formula><tex-math id=Z-20220220164751>begin{document}$v'' $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164751.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164751.png/></alternatives></inline-formula>) transitions are required. The laser wavelengths are 744.10, 774.30 and 772.42 nm, respectively. Owing to the summation of <i>R</i>₀₀, <i>R</i>₀₁, and <i>R</i>₀₂ being closer to 1, the A²∏(<i>ν</i><i>′</i>) <inline-formula><tex-math id=Z-20220220164522>begin{document}$leftrightarrow $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164522.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164522.png/></alternatives></inline-formula> X²Σ⁺(<inline-formula><tex-math id=Z-20220220164743>begin{document}$v'' $end{document}</tex-math><alternatives><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164743.jpg/><graphic xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=4-20211688_Z-20220220164743.png/></alternatives></inline-formula>) transition is a quasicycling transition. These results imply that the LiCl^– anion is a candidate for laser cooling.</sec>" @default.
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• W4213022312 date "2022-01-01" @default.
• W4213022312 modified "2023-09-26" @default.
• W4213022312 title "Spectroscopic and transition properties of LiCl^– anion" @default.
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• W4213022312 doi "https://doi.org/10.7498/aps.71.20211688" @default.
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