论文标题
亚稳态氦原子和地下锂原子之间的自旋状态控制的化学离子化反应
Spin-state-controlled chemi-ionization reactions between metastable helium atoms and ground-state lithium atoms
论文作者
论文摘要
我们证明了$^4 $ He（2 $^3 $ s $ _1 $）的控制 - $^7 $ li（2 $^2 $ s $ _ {1/2} $）在碰撞过程之前通过全光型电子旋转态制剂的化学离子化反应。我们的结果表明，对于热能在热能处的非旋转（自旋持续）碰撞，化学离子被强烈抑制（增强）。这些发现与基于制备原子态与准分子状态的自旋角动量耦合的模型非常吻合。与模型的小偏差表明$^4σ^+$通道对违反自旋保护的反应速率的贡献。
We demonstrate the control of $^4$He(2$^3$S$_1$)-$^7$Li(2$^2$S$_{1/2}$) chemi-ionization reactions by all-optical electron-spin-state preparation of both atomic species prior to the collision process. Our results demonstrate that chemi-ionization is strongly suppressed (enhanced) for non-spin-conserving (spin-conserving) collisions at thermal energies. These findings are in good agreement with a model based on spin angular momentum coupling of the prepared atomic states to the quasi-molecular states. Small deviations from the model indicate the contribution of the $^4Σ^+$ channel to the reaction rate which is in violation of spin conservation.
