Three-body recombination for electrons in a strong magnetic field: Magnetic moment
Three-body recombination for electrons in a strong magnetic field: Magnetic moment
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强磁场中电子的三体复合：磁矩
DOI：
10.1103/physreva.73.033401
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发表时间：
2006
影响因子：
2.9
通讯作者：
F. Robicheaux
中科院分区：
文献类型：
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作者：
F. Robicheaux
我们用经典的蒙特卡罗方法计算了强磁场中的三体复合(两个自由电子和一个质子散射到一个自由电子和一个氢原子中，$e+e+p的数学公式{H}+e})。质子在空间中是固定的，但电子被允许进行完整的三维运动。我们研究了类似于最近产生反氢的实验中使用的温度和场的复合。将目前的速率与用引导中心近似给出的电子运动速率进行了比较，验证了以前的结果，并证明了该近似在较高温度下是崩溃的。与$B=0的情况不同，强的$B$给了具有正磁矩的原子优先的复合。此外，即使在磁矩为负的情况下，场方向上的正则角动量也常常为负。这两个结果都影响了空间相关磁场对反氢的捕获。
Using a classical Monte Carlo method, we have computed the three-body recombination (two free electrons and a proton scattering into one free electron and a hydrogen atom, $e+e+p\ensuremath{\rightarrow}\mathrm{H}+e$) in strong magnetic fields. The proton is fixed in space but the electrons are allowed their full, three-dimensional motion. We investigate recombination for temperatures and fields similar to those used in recent experiments that generated antihydrogen. The present rate is compared to that when the electrons' motion is given by the guiding center approximation, validating previous results at low temperature and demonstrating the breakdown of this approximation at higher temperature. Unlike the $B=0$ case, strong $B$ gives preferential recombination to atoms with positive magnetic moment. Also, the canonical angular momentum in the field direction is often negative even when the magnetic moment is negative. Both results affect the trapping of antihydrogen using spatially dependent magnetic fields.