Fine Structure in Cold Collisions of Spin-Polarized H(2s) Atoms
Fine Structure in Cold Collisions of Spin-Polarized H(2s) Atoms
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自旋极化H(2s)原子冷碰撞的精细结构
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Dalgarno
中科院分区：
文献类型：
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作者：
S. Jonsell;R. C. Forrey;A. Saenz;P. Froelich;A. Dalgarno
本文计算了2s态氢原子碰撞的弹性散射、电离和双激发转移的截面和速率系数。我们发现，当碰撞能量在5 × 10 ~（-10）a.u.和10-6 a.u.弹性散射具有最大的横截面。对于低于0.02 K的温度电离是占主导地位的损失过程，而对于较高的温度双激发转移占主导地位。我们的总损失率的结果被发现是在最近的测量误差条的2或3倍。
We have calculated cross sections and rate coefficients for elastic scattering, ionization, and double excitation transfer in collision of two hydrogen atoms in the 2s state. We find that for collision energies between 5 × 10-10 a.u. and 10-6 a.u. elastic scattering has the largest cross section. For temperatures below 0.02 K ionization is the dominant loss process, while for higher temperatures double excitation transfer dominates. Our results for the total loss rate are found to be within a factor 2 or 3 of the error bars of recent measurements.