辐射电子俘获作为高度线性极化x射线的可调谐源
Radiative electron capture as a tunable source of highly linearly polarized x-rays
摘要：
本文研究了裸质子与氢气靶碰撞时K壳层的辐射电子俘获。在这项研究中，K-REC辐射的线性偏振度进行了测量，并与严格的相对论计算以及与以前的结果记录的U $^{92+}$。由于改进的探测器技术，本偏振测量的精度的显着增益相比，以前公布的结果。所获得的数据证实，对于中等Z离子，例如，REC过程是高度偏振的X射线的源，其可以容易地相对于线性偏振度和光子能量进行调谐。我们认为，特别是，相对较低的能量下发射的光子大角度几乎完全线性偏振。
英文摘要：
The radiative electron capture (REC) into the K shell of bare Xe ions colliding with a hydrogen gas target has been investigated. In this study, the degree of linear polarization of the K-REC radiation was measured and compared with rigorous relativistic calculations as well as with the previous results recorded for U$^{92+}$. Owing to the improved detector technology a significant gain in precision of the present polarization measurement is achieved compared to the previously published results. The obtained data confirms that for medium-Z ions such as Xe the REC process is a source of highly polarized x-rays which can easily be tuned with respect to the degree of linear polarization and the photon energy. We argue, in particular, that for relatively low energies the photons emitted under large angles are almost fully linear polarized.
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