Resonant Auger effect at high x-ray intensity.

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Phys. Rev. A

DOI:https://doi.org/10.1103/PhysRevA.77.053404· OSTI ID:935290

Rohringer, N; Santra, R

The resonant Auger effect of atomic neon exposed to high-intensity x-ray radiation in resonance with the 1s {yields} 3p transition is discussed. High intensity here means that the x-ray peak intensity is sufficient ({approx}10{sup 18} W/cm{sup 2}) to induce Rabi oscillations between the neon ground state and the 1s {sup -1}3p ({sup 1}P) state within the relaxation lifetime of the inner-shell vacancy. For the numerical analysis presented, an effective two-level model, including a description of the resonant Auger decay process, is employed. Both coherent and chaotic x-ray pulses are treated. The latter are used to simulate radiation from x-ray free-electron lasers based on the principle of self-amplified spontaneous emission. Observing x-ray-driven atomic population dynamics in the time domain is challenging for chaotic pulse ensembles. A more practical option for experiments using x-ray free-electron lasers is to measure the line profiles in the kinetic energy distribution of the resonant Auger electron. This provides information on both atomic population dynamics and x-ray pulse properties.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 935290
• Report Number(s): ANL/CSE/JA-61418
• Journal Information: Phys. Rev. A, Journal Name: Phys. Rev. A Journal Issue: 2008 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AUGER EFFECT
ENERGY-LEVEL TRANSITIONS
FREE ELECTRON LASERS
MATHEMATICAL MODELS
NEON
X RADIATION