The effect of the dipole bound state on AgF−vibrationally resolved photodetachment cross sections and photoelectron angular distributions

2014 ◽  
Vol 141 (15) ◽  
pp. 154304 ◽  
Author(s):  
Diep Bich Dao ◽  
Richard Mabbs
Keyword(s):  
Cross Sections ◽  
Bound State ◽  
Angular Distributions ◽  
Photoelectron Angular Distributions

scholarly journals Photoelectron Angular Distributions of Nonresonant Two-Photon Atomic Ionization Near Nonlinear Cooper Minima

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 54
Author(s):  
Jiri Hofbrucker ◽  
Latifeh Eiri ◽  
Andrey V. Volotka ◽  
Stephan Fritzsche
Keyword(s):  
Cross Sections ◽  
Incident Light ◽  
Angular Distributions ◽  
Two Photon ◽  
Atomic Ionization ◽  
Independent Particle ◽  
Photon Ionization ◽  
Ionization Cross Sections ◽  
Photoelectron Angular Distributions ◽  
Asymmetry Parameters

Photoelectron angular distributions of the two-photon ionization of neutral atoms are theoretically investigated. Numerical calculations of two-photon ionization cross sections and asymmetry parameters are carried out within the independent-particle approximation and relativistic second-order perturbation theory. The dependence of the asymmetry parameters on the polarization and energy of the incident light as well as on the angular momentum properties of the ionized electron are investigated. While dynamic variations of the angular distributions at photon energies near intermediate level resonances are expected, we demonstrate that equally strong variations occur near the nonlinear Cooper minimum. The described phenomena is demonstrated on the example of two-photon ionization of magnesium atom.

Vibrationally resolved K-shell photoionization cross sections of methane

Open Physics ◽  
2013 ◽  
Vol 11 (9) ◽  
Author(s):  
Etienne Plésiat ◽  
Piero Decleva ◽  
Fernando Martín
Keyword(s):  
Cross Sections ◽  
Density Functional ◽  
Dft Method ◽  
Chem Phys ◽  
Angular Distributions ◽  
Functional Theory ◽  
The Rich ◽  
Photoelectron Angular Distributions ◽  
Molecular Frame ◽  
Good Agreement

AbstractWe use an extension of the static-exchange density functional theory (DFT) method, previously reported in [E. Plésiat et al., Phys. Rev. A 2, 023409 (2012), E. Plésiat, P. Decleva, F. Martín, Phys. Chem. Chem. Phys. 31, 10853 (2012)], to evaluate vibrationally resolved (total and angular) K-shell photoelectron cross sections of methane. The calculated cross sections are in very good agreement with the existing experimental measurements at low photoelectron energies. We show that, in contrast with the rich interference patterns previously observed in molecular frame C(1s) photoelectron angular distributions of methane at both low and high photoelectron energy, no interference effects are observed in the calculated β parameters, even at high photon energies.

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