Cusp Kernels for Velocity-Changing Collisions
Cusp Kernels for Velocity-Changing Collisions
复制标题
DOI：
10.1103/physrevlett.108.183202
复制
发表时间：
2012-05-03
影响因子：
8.6
通讯作者：
Happer, W.
中科院分区：
文献类型：
--
作者：
McGuyer, B. H.;Marsland, R., III;Happer, W.
我们引入了一个解析核，即“尖”核，来模拟速度变化碰撞对低压缓冲气体中光抽运原子的影响。像广泛使用的keilson - storekernel [J]。凯尔森和J. E.斯托弗，Q.阿普尔。数学。10,243(1952)]，尖峰核的特征是单一参数，并保持麦克斯韦速度分布。Cusp核和它们的叠加比keilson - stoover核更有用，因为它们更类似于从测量或理论推断的真实核，并且更容易反转以找到稳态速度分布。
We introduce an analytical kernel, the "cusp'' kernel, to model the effects of velocity-changing collisions on optically pumped atoms in low-pressure buffer gases. Like the widely used Keilson-Storer kernel [J. Keilson and J. E. Storer, Q. Appl. Math. 10, 243 (1952)], cusp kernels are characterized by a single parameter and preserve a Maxwellian velocity distribution. Cusp kernels and their superpositions are more useful than Keilson-Storer kernels, because they are more similar to real kernels inferred from measurements or theory and are easier to invert to find steady-state velocity distributions.