Diamant R, Huotari S, Hämäläinen K, Sharon R, Kao C C, Deutsch M
Physics Department, Bar-Ilan University, Ramat-Gan 52900, Israel.
Phys Rev Lett. 2003 Nov 7;91(19):193001. doi: 10.1103/PhysRevLett.91.193001. Epub 2003 Nov 6.
High-resolution Fe K(h) beta(1,3) and K(h) alpha(1,2) hypersatellite spectra were measured, using monochromatized synchrotron radiation photoexcitation. The lines' energies, splitting, excitation thresholds, and the K(h) alpha(1)/K(h) alpha(2) intensity ratio were derived with high accuracy. Having both spectra, not hitherto available for any atom with high resolution, allows separating out the energy shifts of the outer levels caused by a K shell spectator vacancy. Comparison with ab initio relativistic multiconfigurational Dirac-Fock calculations reveals that while the influence of relativity and QED effects is mostly accounted for, discrepancies remain in the lines' intensity ratio, which sensitively measures the intermediacy of the coupling. Similar discrepancies, of unknown origin, are found in the energy shifts of the outer levels due to the final-state K shell spectator vacancy.
利用单色同步辐射光激发测量了高分辨率的铁K(h)β(1,3)和K(h)α(1,2)超卫星光谱。高精度地得出了谱线的能量、分裂、激发阈值以及K(h)α(1)/K(h)α(2)强度比。此前任何原子都未曾有过高分辨率的这两种光谱，利用它们能够分离出由K壳旁观空位引起的外层能级的能量位移。与从头算相对论多组态狄拉克-福克计算结果的比较表明，虽然相对论效应和量子电动力学效应的影响大多已得到考虑，但谱线强度比仍存在差异，该强度比能灵敏地测量耦合的中间状态。在外层能级因终态K壳旁观空位导致的能量位移中也发现了来源不明的类似差异。
