利用X射线自由电子激光在O₂分子中产生双芯空穴：分子框架光电子角分布

Double Core-Hole Generation in O_{2} Molecules Using an X-Ray Free-Electron Laser: Molecular-Frame Photoelectron Angular Distributions.

作者信息

Kastirke Gregor, Schöffler Markus S, Weller Miriam, Rist Jonas, Boll Rebecca, Anders Nils, Baumann Thomas M, Eckart Sebastian, Erk Benjamin, De Fanis Alberto, Fehre Kilian, Gatton Averell, Grundmann Sven, Grychtol Patrik, Hartung Alexander, Hofmann Max, Ilchen Markus, Janke Christian, Kircher Max, Kunitski Maksim, Li Xiang, Mazza Tommaso, Melzer Niklas, Montano Jacobo, Music Valerija, Nalin Giammarco, Ovcharenko Yevheniy, Pier Andreas, Rennhack Nils, Rivas Daniel E, Dörner Reinhard, Rolles Daniel, Rudenko Artem, Schmidt Philipp, Siebert Juliane, Strenger Nico, Trabert Daniel, Vela-Perez Isabel, Wagner Rene, Weber Thorsten, Williams Joshua B, Ziolkowski Pawel, Schmidt Lothar Ph H, Czasch Achim, Ueda Kiyoshi, Trinter Florian, Meyer Michael, Demekhin Philipp V, Jahnke Till

机构信息

Institut für Kernphysik, Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany.

European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany.

出版信息

Phys Rev Lett. 2020 Oct 16;125(16):163201. doi: 10.1103/PhysRevLett.125.163201.

DOI:10.1103/PhysRevLett.125.163201

PMID:33124863

Abstract

We report on a multiparticle coincidence experiment performed at the European X-ray Free-Electron Laser at the Small Quantum Systems instrument using a COLTRIMS reaction microscope. By measuring two ions and two electrons in coincidence, we investigate double core-hole generation in O_{2} molecules in the gas phase. Single-site and two-site double core holes have been identified and their molecular-frame electron angular distributions have been obtained for a breakup of the oxygen molecule into two doubly charged ions. The measured distributions are compared to results of calculations performed within the frozen- and relaxed-core Hartree-Fock approximations.

摘要

我们报告了一项在欧洲X射线自由电子激光装置的小量子系统仪器上使用COLTRIMS反应显微镜进行的多粒子符合实验。通过同时测量两个离子和两个电子，我们研究了气相中O₂分子双芯孔的产生。已识别出单位点和两位点双芯孔，并获得了氧分子分解为两个双电荷离子时其分子框架电子角分布。将测量的分布与在冻结芯和松弛芯哈特里 - 福克近似下进行的计算结果进行了比较。