Results 1 to 10 of about 5,298 (198)

Photoionization from the Ground and Excited Vibrational States of and Its Deuterated Isotopologues

open access: yesThe Astrophysical Journal Supplement Series, 2023
Photoionization cross sections and rate coefficients have been calculated for all bound vibrational levels of the 1s σ _g state of ${{\rm{H}}}_{2}^{+}$ , HD ^+ , and ${{\rm{D}}}_{2}^{+}$ . The Born–Oppenheimer approximation is employed in our calculation
Adam Singor   +4 more
doaj   +1 more source

Attosecond delays between dissociative and non-dissociative ionization of polyatomic molecules

open access: yesNature Communications, 2023
The interplay between electronic and nuclear motions in molecules is a central concept in molecular science. To what extent it influences attosecond photoionization delays is an important, still unresolved question. Here, we apply attosecond electron-ion
Xiaochun Gong   +5 more
doaj   +1 more source

Benchmark PhotoIonization Cross-Sections of Neutral Scandium from the Ground and Excited States

open access: yesAtoms, 2021
The B-spline R-matrix method has been used to investigate cross-sections for photoionization of neutral scandium from the ground and excited states in the energy region from the 3d and 4s valence electron ionization thresholds to 25 eV. The initial bound
Swaraj S. Tayal, Oleg Zatsarinny
doaj   +1 more source

Mechanisms of 1s Double-Core-Hole Excitation and Decay in Neon

open access: yesAtoms, 2021
The formation and decay of double-core-hole (DCH) states of the neon ion irradiated by an intense electromagnetic x-ray field are studied theoretically. In the present research DCH formation is the result of sequential absorption of two photons with the ...
Maksim D. Kiselev   +4 more
doaj   +1 more source

Retrieval of photoionization group delay in chirped-attosecond pulses photoelectron streaking experiments

open access: yesNew Journal of Physics, 2022
Photoionization time delays have been investigated in many streaking experiments in which an extreme ultraviolet (XUV) attosecond pulse is used to ionize the target in the presence of a dressing infrared laser field.
Xi Zhao   +3 more
doaj   +1 more source

Probing C60 Fullerenes from within Using Free Electron Lasers

open access: yesAtoms, 2022
Fullerenes, such as C60, are ideal systems to investigate energy redistribution following substantial excitation. Ultra-short and ultra-intense free electron lasers (FELs) have allowed molecular research in a new photon energy regime.
Nora Berrah
doaj   +1 more source

A semiclassical approach reproducing asymptotically the Heitler formula for atomic photoionization

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2020
The wave-corpuscle method for description of atomic photoionization by a flux of photons in the visible and X-ray range was developed and applied. Using the calculated photoionization probability in the asymptotics, we obtained the desired approximate ...
A.M. Shaimardanov   +2 more
doaj   +1 more source

Photoionization-Induced Broadband Dispersive Wave Generated in an Ar-Filled Hollow-Core Photonic Crystal Fiber

open access: yesCrystals, 2021
The resonance band in hollow-core photonic crystal fiber (HC-PCF), while leading to high-loss region in the fiber transmission spectrum, has been successfully used for generating phase-matched dispersive wave (DW). Here, we report that the spectral width
Jianhua Fu   +9 more
doaj   +1 more source

Polarized photoelectrons from converging vector waves

open access: yesNew Journal of Physics, 2022
This paper investigates the spin characteristics of photoelectrons when hydrogen-like ions are centro-symmetrically irradiated with converging vector waves—a non-paraxial form of structured light.
B Hafizi, D Younis, D F Gordon
doaj   +1 more source

Single-shot electron imaging of dopant-induced nanoplasmas

open access: yesNew Journal of Physics, 2021
We present single-shot electron velocity-map images of nanoplasmas generated from doped helium nanodroplets and neon clusters by intense near-infrared and mid-infrared laser pulses.
C Medina   +21 more
doaj   +1 more source

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