| Literature DB >> 30192600 |
Kenji Tamasaku1, Eiji Shigemasa2, Yuichi Inubushi3, Ichiro Inoue1, Taito Osaka1, Tetsuo Katayama3, Makina Yabashi1,3, Akihiro Koide2,4, Toshihiko Yokoyama2, Tetsuya Ishikawa1.
Abstract
X-ray two-photon absorption (TPA) spectrum of metallic copper is measured using a free-electron laser (XFEL). The spectrum differs from that measured by the conventional one-photon absorption (OPA), and characterized by a peak below the Fermi level, which is assigned to the transition to the 3d state. The impact of the XFEL pulse on the OPA spectrum is discussed by analyzing the pulse-energy dependence, which indicates that the intrinsic TPA spectrum is measured.Entities:
Year: 2018 PMID： 30192600 DOI： 10.1103/PhysRevLett.121.083901
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161