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Electron collision studies of cesium using a magneto-optical trap.

机译:使用磁光阱对铯进行电子碰撞研究。

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摘要

Experiments involving a magneto-optical trap (MOT) as the target in electron impact cross section studies were carried out. The use of a MOT allows the kinematic properties of the target atoms, and their electronic states, to be controlled via operating parameters of the MOTu27s lasers. A MOT is capable of saturating the excited state of a gaseous target of atoms and provides a unique opportunity to measure exotic collision processes. Measurements use a trap-loss technique to relate the loss rate of atoms from the trap due to electron interactions to a collision cross section. Total scattering cross section measurements are given for the 62S 1/2 ground state and the 62P3/2 excited state of cesium. The excited state measurement is the first measurement of its kind. Total ionization cross sections are also presented for the both the 6 2S1/2 ground state and 62P3/2 excited state. The ionization cross sections are measured by adjusting the radiation force of the MOT lasers to damp the elastic scattering component of the total cross section. The ionization cross section for the excited state is the first experimental determination of its kind. Full details of the experimental apparatus and the analysis procedure are presented. The results of this experiment are combined with other experimental data and compared to the most recent calculations.Dept. of Physics. Paper copy at Leddy Library: Theses u26 Major Papers - Basement, West Bldg. / Call Number: Thesis2003 .M322. Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4996. Adviser: J. W. McConkey. Thesis (Ph.D.)--University of Windsor (Canada), 2003.
机译:在电子撞击截面研究中,进行了以磁光阱(MOT)为目标的实验。使用MOT可以通过MOT激光器的工作参数控制目标原子的运动学特性及其电子状态。 MOT能够使原子气态靶的激发态饱和,并为测量奇异的碰撞过程提供了独特的机会。测量使用陷阱损失技术将由于电子相互作用而导致的陷阱中的原子损失率与碰撞截面相关联。给出了铯的62S 1/2基态和62P3 / 2激发态的总散射截面测量结果。激发态测量是此类的第一个测量。还给出了6 2S1 / 2基态和62P3 / 2激发态的总电离截面。通过调节MOT激光器的辐射力以衰减总截面的弹性散射分量来测量电离截面。激发态的电离截面是此类实验的首次确定。介绍了实验仪器和分析程序的全部细节。该实验的结果与其他实验数据相结合,并与最新的计算结果进行了比较。物理学。莱迪图书馆的纸质副本:论文主要论文-西楼地下室。 /致电号码:Thesis2003 .M322。资料来源:国际论文摘要,第64-10卷,第B部分,第4996页。顾问:J。W. McConkey。论文(博士学位)-温莎大学(加拿大),2003。

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    MacAskill John Alexander.;

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