Time delay between photoemission from the 2p and 2s subshells of Neon

Abstract

The R-Matrix incorporating Time (RMT) method is a new method for solving the time-dependent Schroedinger equation for multi-electron atomic systems exposed to intense short-pulse laser light. We have employed the RMT method to investigate the time delay in the photoemission of an electron liberated from a 2p orbital in a neon atom with respect to one released from a 2s orbital following absorption of an attosecond XUV pulse. Time delays due to XUV pulses in the range 76-105 eV are presented. For an XUV pulse at the experimentally relevant 105.2 eV, we calculate the time delay to be 10.2 +/- 1.3 attoseconds, somewhat larger than estimated by other theoretical calculations, but still a factor two smaller than experiment. We repeated the calculation for a photon energy of 89.8 eV with a larger basis set capable of modelling correlated-electron dynamics within the neon atom and the residual Ne(+) ion. A time delay of 14.5 +/- 1.5 attoseconds was observed, compared to a 16.7 +/- 1.5 attosecond result using a single-configuration representation of the residual Ne(+) ion.

4 pages, 3 figures, 1 table

References in corpus (2)

• Delay in atomic photoionization
• A combined R-matrix eigenstate basis set and finite-differences propagation method for the time-dependent Schr\"{od}dinger equation: the one-electron case

Cited by in corpus (15)

• Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules
• Study of attosecond delays using perturbation diagrams and exterior complex scaling
• Angle-resolved time delay in photoemission
• Time-dependent R-matrix theory applied to two-photon double ionization of He
• Atomic harmonic generation in time-dependent R-matrix theory
• Optical vortices discern attosecond time delay in electron emission from magnetic sublevels
• Attosecond photoionization dynamics in neon
• The influence of multiple ionization thresholds on harmonic generation: Ar+
• Attosecond time delay in the photoionization of Mn in the region of the $3p\to 3d$ giant resonance
• Multichannel Interference In High-Order Harmonic Generation From Ne(+) Driven By Ultrashort Intense Laser Pulse
• Electron dynamics in the carbon atom induced by spin-orbit interaction
• Wigner Time Delay in Photoionization: A 1D Model Study
• Quantum Simulation of the First-Quantized Pauli-Fierz Hamiltonian
• Angular distributions in two-colour two-photon ionization of He
• Wave-front controlled attosecond time domain interferometry