论文标题
电场控制的冷冷偶性碰撞CH $ _3 $ f分子
Electric-field-controlled cold dipolar collisions between trapped CH$_3$F molecules
论文作者
论文摘要
达到高密度是迈向多原子分子冷碰撞实验的关键步骤。 We use a cryofuge to load up to 2$\times10^7$ CH$_3$F molecules into a box-like electric trap, achieving densities up to 10$^7$/cm$^3$ at temperatures around 350 mK where the elastic dipolar cross-section exceeds 7$\times$10$^{-12}$cm$^2$.我们测量低于4 $ \ times $ 10 $^{ - 8} $ cm $^3 $/s的非弹性费率常数，并通过调整均覆盖陷阱体积的大部分的均质电场来控制这些。与Ab-Initio计算的比较与偶极弛豫具有极好的一致性。我们的技术和发现是通用的，并且与其他冷分子碰撞实验有关。
Reaching high densities is a key step towards cold-collision experiments with polyatomic molecules. We use a cryofuge to load up to 2$\times10^7$ CH$_3$F molecules into a box-like electric trap, achieving densities up to 10$^7$/cm$^3$ at temperatures around 350 mK where the elastic dipolar cross-section exceeds 7$\times$10$^{-12}$cm$^2$. We measure inelastic rate constants below 4$\times$10$^{-8}$cm$^3$/s and control these by tuning a homogeneous electric field that covers a large fraction of the trap volume. Comparison to ab-initio calculations gives excellent agreement with dipolar relaxation. Our techniques and findings are generic and immediately relevant for other cold-molecule collision experiments.
