Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange
Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange
复制标题
使用共振电荷交换在激光选择的里德伯态中产生大量冷正电子原子
DOI：
10.1088/0953-4075/49/6/064002
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
M. Weel
中科院分区：
文献类型：
--
作者：
R. McConnell;G. Gabrielse;W. Kolthammer;P. Richerme;A. Müllers;J. Walz;D. Grzonka;M. Zielinski;D. Fitzakerley;M. George;E. A. Hessels;C. H. Storry;M. Weel
激光被用来控制高激发正电子原子(Ps*)的产生。激光将Cs原子激发到里德堡态，里德堡态具有与冷捕获正电子发生共振电荷交换碰撞的较大截面。对于每一次有3000万个被捕获的正电子的试验，超过70万个产生的Ps*在仪器的轴线附近有轨迹，并使用斯塔克电离进行探测。这个P*的数量是早期原理证明演示(2004物理)中实现的500倍。让我们来吧。B 597257)。这些近轴Ps*与捕获的反质子的第二次电荷交换可以用来产生冷反氢，这种反氢的产生预计会以类似的因素增加。
Lasers are used to control the production of highly excited positronium atoms (Ps*). The laser light excites Cs atoms to Rydberg states that have a large cross section for resonant charge-exchange collisions with cold trapped positrons. For each trial with 30 million trapped positrons, more than 700 000 of the created Ps* have trajectories near the axis of the apparatus, and are detected using Stark ionization. This number of Ps* is 500 times higher than realized in an earlier proof-of-principle demonstration (2004 Phys. Lett. B 597 257). A second charge exchange of these near-axis Ps* with trapped antiprotons could be used to produce cold antihydrogen, and this antihydrogen production is expected to be increased by a similar factor.
影响因子：
8.6
作者：
Andresen, G. B.;Ashkezari, M. D.;Yamazaki, Y.
通讯作者：
Yamazaki, Y.