Theory of Auger decay by laser-dressed atoms

Abstract

We devise an ab initio formalism for the quantum dynamics of Auger decay by laser-dressed atoms which are inner-shell ionized by extreme ultraviolet (XUV) light. The optical dressing laser is assumed to be sufficiently weak such that ground-state electrons are neither excited nor ionized by it. However, the laser has a strong effect on continuum electrons which we describe in strong-field approximation with Volkov waves. The XUV light pulse has a low peak intensity and its interaction is treated as a one-photon process. The quantum dynamics of the inner-shell hole creation with subsequent Auger decay is given by equations of motion (EOMs). For this paper, the EOMs are simplified in terms of an essential-states model which is solved analytically and averaged over magnetic subshells. We apply our theory to the M_4,5 N_1 N_2,3 Auger decay of a 3d hole in a krypton atom. The orbitals are approximated by scaled hydrogenic wave functions. A single attosecond pulse produces 3d vacancies which Auger decay in the presence of an 800nm laser with an intensity of 10^13 W / cm^2. We compute the Auger electron spectrum and assess the convergence of the various quantities involved.

arXiv comment19 pages, 7 figures, 1 table, RevTeX4

References in corpus (8)

• Attosecond Control of Ionization Dynamics
• Coherent Electron Scattering Captured by an Attosecond Quantum Stroboscope
• Electromagnetically induced transparency for x rays
• Theory of x-ray absorption by laser-dressed atoms
• Non-Hermitian Rayleigh-Schroedinger Perturbation Theory
• X-ray refractive index of laser-dressed atoms
• Theory of x-ray absorption by laser-aligned symmetric-top molecules
• Strong-field control of x-ray absorption

Cited by in corpus (8)

• Transient absorption and reshaping of ultrafast XUV light by laser-dressed helium
• Theory of ac-Stark splitting in core-resonant Auger decay under strong x-ray fields
• Attosecond pulses at kiloelectronvolt photon energies from high-order harmonic generation with core electrons
• Theoretical description of field-assisted post-collision interaction in Auger decay of atoms
• Optical control of resonant Auger processes
• High-order harmonic generation with resonant core excitation by ultraintense x rays
• Ramsey method for Auger-electron interference induced by an attosecond twin pulse
• Optically-dressed resonant Auger processes induced by high-intensity x rays