Observation of Photoion Backward Emission in Photoionization of He and
S Grundmann, M Kircher, I Vela-Perez, G Nalin… - Physical review …, 2020 - APS
Physical review letters, 2020•APS
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≤ E γ≤ 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 …
distributions of photoions and photoelectrons generated in one-photon ionization in an
energy range of 300 eV≤ E γ≤ 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 …
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 . 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 times the photon momentum. These results experimentally confirm a 90-year-old prediction.
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