Epp S W, López-Urrutia J R Crespo, Brenner G, Mäckel V, Mokler P H, Treusch R, Kuhlmann M, Yurkov M V, Feldhaus J, Schneider J R, Wellhöfer M, Martins M, Wurth W, Ullrich J
Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany.
Phys Rev Lett. 2007 May 4;98(18):183001. doi: 10.1103/PhysRevLett.98.183001. Epub 2007 May 1.
In a proof-of-principle experiment, we demonstrate high-resolution resonant laser excitation in the soft x-ray region at 48.6 eV of the 2 (2)S(1/2) to 2 (2)P(1/2) transition of Li-like Fe23+ ions trapped in an electron beam ion trap by using ultrabrilliant light from Free Electron Laser in Hamburg (FLASH). High precision spectroscopic studies of highly charged ions at this and upcoming x-ray lasers with an expected accuracy gain up to a factor of a thousand, become possible with our technique, thus potentially yielding fundamental insights, e.g., into basic aspects of QED.
在一项原理验证实验中，我们利用汉堡自由电子激光（FLASH）产生的超强光，在电子束离子阱中捕获的类锂Fe23+离子从2 (2)S(1/2)到2 (2)P(1/2)跃迁的48.6电子伏特软X射线区域，演示了高分辨率共振激光激发。借助我们的技术，对高电荷离子在该X射线激光器以及即将出现的预期精度提高高达一千倍的X射线激光器上进行高精度光谱研究成为可能，从而有可能产生例如对量子电动力学基本方面的深刻见解。
