Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms
Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms
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亚稳态双电子原子与基态碱原子之间的自旋相关非弹性碰撞
DOI：
10.1088/1367-2630/aa8cec
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发表时间：
2017
影响因子：
3.3
通讯作者：
Y. Takahashi
中科院分区：
文献类型：
--
作者：
F. Schäfer;H. Konishi;Adrien Bouscal;Tomoya Yagami;Y. Takahashi
实验研究了在低磁场条件下，亚稳3p2态的镱（Yb）与2s1 / 2基态流形中的锂（Li）非弹性碰撞的自旋依赖性。采用选择性激发法获得了174 Yb（3p2）的所有磁亚能级mJ，并通过光泵浦制备了li6的6个最低磁亚能级中的4个。一方面，发现了Li（F = 1 / 2）原子碰撞的mj无关性。另一方面，在与Li（F = 3 / 2）原子的碰撞中，观察到系统的mj依赖性，特别是在拉伸碰撞状态下的抑制损失。此外，研究发现mj变化过程的相关性较小。观察到的非弹性碰撞率的跨度在1 × 10−11和40 × 10−11 cm 3s−1之间，并讨论了观察到的行为的可能起源。
Experimentally the spin dependence of inelastic collisions between ytterbium (Yb) in the metastable 3 P 2 state and lithium (Li) in the 2 S 1 / 2 ground state manifold is investigated at low magnetic fields. Using selective excitation all magnetic sublevels mJ of 174 Yb( 3 P 2 ) are accessed and four of the six lowest lying magnetic sublevels of L i 6 are prepared by optical pumping. On the one hand, mJ-independence of collisions involving Li( F = 1 / 2 ) atoms is found. A systematic mJ-dependence in collisions with Li( F = 3 / 2 ) atoms, in particular suppressed losses for stretched collisional states, is observed on the other hand. Further, mJ-changing processes are found to be of minor relevance. The span of observed inelastic collision rates is between 1 × 10 − 11 and 40 × 10 − 11 cm 3 s − 1 , and a possible origin of the observed behavior is discussed.