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首页> 外文期刊>Physical Review, A. Atomic, molecular, and optical physics >Double- and single-electron transfer in H++K collisions from 0.3 to 4keV: Separation of direct double transfer and two-step successive single-electron transfer
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Double- and single-electron transfer in H++K collisions from 0.3 to 4keV: Separation of direct double transfer and two-step successive single-electron transfer

机译：H ++ K碰撞中从0.3keV到4keV的双电子和单电子转移：分离直接双转移和两步连续单电子转移

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摘要

Double-electron transfer and two-step single-electron transfer in collisions of proton with potassium-metal target are measured in the collision energy from 0.3 to 4 keV by using a charge-inversion mass spectrometry. Two prominent H- ion peaks are observed with different values of the energy loss and show different target density dependences. The peak with larger energy loss is identified as double-electron transfer and the other as two-step successive single-electron transfer from the analysis of the target density dependence. The two-step single-electron transfer is considered to occur as the process accompanying spontaneous Ly-alpha emission, followed by negative H- formation. A theoretical analysis is also carried out, and the single-electron transfer cross section obtained is found to be in excellent agreement with the present measurement, while the present measurement for double-electron transfer is found to be much smaller than those evaluated earlier and the present theory.
机译：质子与钾金属靶的碰撞中的双电子转移和两步单电子转移通过电荷反转质谱法在0.3keV至4keV的碰撞能量下进行了测量。观察到两个突出的H离子峰，能量损失的值不同，并且显示出不同的目标密度依赖性。根据目标密度依赖性的分析，能量损失较大的峰被识别为双电子转移，另一个为两步连续单电子转移。两步单电子转移被认为是伴随自发的Ly-alpha发射，随后形成负H-形成的过程。还进行了理论分析，发现获得的单电子转移截面与当前测量值非常吻合，而发现目前的双电子转移测量值比先前评估的结果小得多，并且现在的理论。

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