Acquisition of Laser Equipment for Research Collision, Population Transfer and Control in Highly Excited Atoms

9413915麦克亚当一台调Q激光激光器，一台脉冲钛蓝宝石激光器和一台脉冲染料激光器将被提供给肯塔基大学的高被引用(里德堡)原子的性质和碰撞研究项目。这个项目将研究单电荷正离子和负离子与里德堡原子在动能下的碰撞，在这种动能下，投射速度和电子速度是相当的。这是截面最大的条件，理论还有待完善，量子力学三体碰撞问题的新现象有待发现。电荷转移、非弹性和电离碰撞将在10-5000 eV的能量下被测量。在这项工作中，激光器是准备国家选定的靶所必需的基础。该提案的资金将使物理和天文学系的脉冲激光设备达到当前的高标准，并将允许扩大对相干的圆形和椭圆形碱性里德堡原子的未探索碰撞性质的研究。使用相同的激光和里德堡交叉光束装置，还将对通过应用数字产生和轮廓电场脉冲来调节的有效状态到状态切换过程进行详细研究。***

9413915 MacAdam A Q-switched YAG laser, a pulsed titanium-sapphire laser and a pulsed dye laser will be supplied to the research program in the properties and collisions of highly cited (Rydberg) atoms at the University of Kentucky. This project will study collisions of singly charged positive and negative ions with Rydberg atoms at kinetic energies for which the projectile and electron speeds are comparable. This is the condition under which cross sections are largest, theories have yet to be perfected, and new phenomena of the quantum-mechanical three-body collision problem await discovery. Charge transfer, inelastic and ionizing collisions will be measured at energies 10-5000 eV. The lasers are a necessary foundation for preparing the state-selected targets in this work. Funding of the proposal would bring the pulsed laser facilities in the Department of Physics and Astronomy up to a high current standard and would allow the extension of research into the unexplored collisional properties of coherent circular and elliptical alkali Rydberg atoms. With the same laser and Rydberg crossed-beam apparatus, detailed studies will also be undertaken of efficient state-to-state switching processes that are mediated by the application of digitally generated and profiled electric-field pulses. ***