Experimental verification of quadrupole-dipole interference in spin-resolved photoionization -: art. no. 053001

被引：16

作者：

Khalil, T ^{[1
]}

Schmidtke, B ^{[1
]}

Drescher, M ^{[1
]}

Müller, N ^{[1
]}

Heinzmann, U ^{[1
]}

机构：

[1] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.89.053001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the spin polarization of Xe (4p)(-1) photoelectrons after ionization with circularly polarized light at photon energies close to the ionization threshold where a resonant enhancement of quadrupole transitions has recently been predicted. At a reaction angle of 90degrees a nonvanishing longitudinal spin polarization component of about 4% clearly indicates a quadrupole contribution to the photoexcitation. This is the first experimental evidence for the influence of nondipole transitions on the photoionization process at excitation energies much below 1 keV in an observable other than the intensity angular distribution.

引用

页码：1 / 053001

页数：4

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