通过形成异常稳定的阴离子停止高能的质量选择碱土金属一氟化物分子束
Stopping mass-selected alkaline-earth metal monofluoride beams of high energy via formation of unusually stable anions
AI总结：
该理论研究探索了通过形成稳定阴离子来停止冷却高能质量选择碱土金属一氟化物分子束的方法，发现此类阴离子化学键极强，RaF⁻适配直接激光冷却，可为囚禁分子精密实验提供支撑。
摘要：
直接激光冷却能力与相对简单的电子结构，让碱土金属一氟化物分子成为基础物理精密测试的多功能实验平台。本理论工作探索了一条通过对应阴离子，高效停止并冷却经质量选择的高能热碱土金属一氟化物分子束的路径，为后续的囚禁分子精密实验提供便利。研究表明这类分子阴离子具有异常强的化学键，且RaF⁻具备利于高效预冷却的性质，证明该阴离子可适用直接激光冷却。
英文摘要：
Direct laser-coolability and a comparatively simple electronic structure render alkaline-earth metal monofluoride molecules versatile laboratories for precision tests of fundamental physics. In this theoretical work, a route for efficient stopping and cooling of high-energy hot beams of mass-selected alkaline-earth metal monofluorides via their anions is explored to facilitate subsequent precision experiments with trapped molecules. It is shown that these molecular anions possess an unusually strong chemical bond and that RaF$^-$ features properties favourable for efficient pre-cooling, indicating the applicability of direct laser-cooling of the anion.
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