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首页> 外文期刊>Radiophysics and quantum electronics >Scattering of low-energy electrons by positive ions in a magnetic field. II. Resonances, transition probabilities, and transport frequencies
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Scattering of low-energy electrons by positive ions in a magnetic field. II. Resonances, transition probabilities, and transport frequencies

机译：低能电子在磁场中被正离子散射。二。共振，跃迁概率和传输频率

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摘要

We analyze quantum-mechanically electron-ion collisions in a magnetic field at a low temperature, for which the electron's thermal energy is less than the energy gap between two Landau levels and the electron's Larmor radius is less than the characteristic impact parameter of close collisions without the magnetic field. To calculate transition probabilities, we use the analytical procedure proposed in the first part of our paper. We calculate the energy and lifetime of the resonant (autoionization) states of an electron embedded in the Coulomb electric field of an ion and in a uniform magnetic field. The obtained values coincide in order of magnitude with the known exact numerical values. We find that the electron backward scattering probability irregularly (chaotically) depends on the particle energy and the magnetic field. We propose analytical approximations for the collision transport frequencies, one of which describes the electron braking along the magnetic field and another, equalizing of the temperatures corresponding to the electron motion along and across the magnetic field.
机译：我们分析了低温下磁场中的量子力学电子离子碰撞，其中电子的热能小于两个朗道能级之间的能隙，并且电子的拉莫尔半径小于无碰撞时的紧密碰撞的特征碰撞参数磁场。为了计算过渡概率，我们使用本文第一部分中提出的分析程序。我们计算嵌入在离子库仑电场和均匀磁场中的电子的共振（自电离）态的能量和寿命。所获得的值在数量级上与已知的精确数值一致。我们发现，电子向后散射的概率不规则地（混沌地）取决于粒子的能量和磁场。我们提出了碰撞传输频率的解析近似值，其中一个描述了沿着磁场的电子制动，另一个描述了与沿着和穿过磁场的电子运动相对应的温度。

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