Nondipole Effects in Xe 4d Photoemission.

Hemmers, O. ; Guillemin, R. ; Wolska, A. ; Lindle, D. W. ; Rolles, D. ; Cheng, K. T. ; Johnson, W. R. ; Zhou, H. L. ; Manson, S. T.

Technical Information Center Oak Ridge Tennessee

关键词: Photoionization;    Photoelectrons;    Atoms;    Angular distributions;    Valence shells;   

RP-ID  :  DE200515014482

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We measured the nondipole parameters for the spin-orbit doublets Xe 4d(5)/(2) and Xe 4d(3)/(2) over a photon-energy range from 100 eV to 250 eV at beamline 8.0.1.3 of the Advanced Light Source at the Lawrence Berkeley National Laboratory. Significant nondipole effects are found at relatively low energies as a result of Cooper minima in dipole channels and interchannel coupling in quadrupole channels. Most importantly, sharp disagreement between experiment and theory, when otherwise excellent agreement was expected, has provided the first evidence of satellite two-electron quadrupole photoionization transitions, along with their crucial importance for a quantitatively accurate theory.