Theory of ultrafast autoionization dynamics of Fano resonances

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053415· OSTI ID:21528675

Chu, W -C; Lin, C D ^[1]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States)

We study atomic autoionization processes in the time domain. With the emerging attosecond extreme vacuum ultraviolet and soft x-ray pulses, we first address how to characterize the time evolution of the decay of a discrete state into a degenerate continuum. A short pump beam generates a number of resonance states in a series and the nearby background continuum, and the resultant wave packet evolves with time until the full decay of the bound states. Taking the 2pns({sup 1}P{sup o}) resonance series embedded in the 2s{epsilon}p({sup 1}P{sup o}) continuum in a beryllium atom as an example, the time evolution of the autoionizing wave packet in the energy domain and in coordinate space is calculated and analyzed, where Fano profiles build up in the photoelectron energy during the process. A proposed pump-probe scheme assumes that the probe beam ionizes the 2s inner electron in the wave packet. The lifetimes of the resonances and the photoelectron energy distribution can be obtained from the ionization yield vs. the time delay of the probe.

• OSTI ID: 21528675
• Journal Information: Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.053415; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AUTOIONIZATION
BEAMS
BERYLLIUM
ELECTRONS
ENERGY SPECTRA
LIFETIME
PULSES
RESONANCE
S STATES
SOFT X RADIATION
TIME DELAY
ULTRAVIOLET RADIATION
WAVE PACKETS
ALKALINE EARTH METALS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
FERMIONS
IONIZATION
IONIZING RADIATIONS
LEPTONS
METALS
RADIATIONS
SPECTRA
X RADIATION