Reply to 'Comment on 'Photoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part I. Experimental study of multiphoton and single-photon processes''

Journal Article · Fri Sep 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.037402· OSTI ID:20857790

Laarmann, T; Guertler, P; Laasch, W; Schulz, J; Wabnitz, H; Moeller, T ^[1]

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1. Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen Synchrotron DESY, Notkestrasse 85, 22607 Hamburg (Germany)

We do not agree with the conclusion of the Comment by Charalambidis et al. questioning our observation of two-photon ionization of helium by intense radiation with 13 eV photons from a vuv free-electron laser. Two-photon ionization is clearly established by the detection of low-energy photoelectrons at {approx}1.7 eV, which agrees very well with the expected energy for a two-photon ionization process.

• OSTI ID: 20857790
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
DETECTION
EV RANGE
FAR ULTRAVIOLET RADIATION
FREE ELECTRON LASERS
HELIUM
IRRADIATION
MULTI-PHOTON PROCESSES
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
PHOTONS
VISIBLE RADIATION