First measurement of the linear polarization of radiative electron capture transitions.
First measurement of the linear polarization of radiative electron capture transitions.
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首次测量辐射电子捕获跃迁的线性偏振。
DOI：
10.1103/physrevlett.97.223202
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发表时间：
2006
影响因子：
8.6
通讯作者：
A. Surzhykov
中科院分区：
文献类型：
--
作者：
S. Tashenov;T. Stöhlker;D. Banas;K. Beckert;P. Beller;H. Beyer;F. Bosch;S. Fritzsche;A. Gumberidze;S. Hagmann;C. Kozhuharov;T. Krings;D. Liesen;F. Nolden;D. Protic;D. Sierpowski;U. Spillmann;M. Steck;A. Surzhykov
本文研究了裸铀离子K壳层辐射电子俘获的极化特性。为此，位置敏感锗探测器已被用作有效的康普顿偏振计。这使我们能够通过分析探测器内部的康普顿散射来测量线性偏振度，并确定偏振平面的方向。根据观察角度和使用的光束能量，辐射被发现是线性偏振高达80%。在所研究的所有情况下，偏振面与碰撞面重合。结果将在严格的相对论计算的背景下进行讨论，表明相对论效应往往会导致发射的辐射去极化。
For radiative electron capture into the K shell of bare uranium ions, a study of the polarization properties has been performed. For this purpose a position sensitive germanium detector has been used as an efficient Compton polarimeter. This enabled us to measure the degree of linear polarization by analyzing Compton scattering inside the detector and to determine the orientation of the polarization plane. Depending on the observation angle and the beam energy used, the radiation is found to be linearly polarized by up to 80%. In all cases studied, the plane of polarization coincides with the collision plane. The results will be discussed in the context of rigorous relativistic calculations, showing that relativistic effects tend to lead to a depolarization of the radiation emitted.