학술논문
Observation of Photoion Backward Emission in Photoionization of He and N2 .
Document Type
Article
Author
Source
Subject
*MOMENTUM distributions
*CENTER of mass
*IONIZATION energy
*LINEAR momentum
*PHOTOELECTRONS
*LIGHT propagation
*PHOTOIONIZATION
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Language
ISSN
0031-9007
Abstract
We experimentally investigate the effects of the linear photon momentum on the momentum distributions of photoions and photoelectrons generated in one-photon ionization in an energy range of 300 eV≤Eγ≤40 keV. Our results show that for each ionization event the photon momentum is imparted onto the photoion, which is essentially the system's center of mass. Nevertheless, the mean value of the ion momentum distribution along the light propagation direction is backward-directed by -3/5 times the photon momentum. These results experimentally confirm a 90-year-old prediction. [ABSTRACT FROM AUTHOR]