Dissociative ionization of H{sub 2} in an attosecond pulse train and delayed laser pulse

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.053413· OSTI ID:21408850

Feng, He; Thumm, Uwe ^[1]

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1. James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506-2604 (United States)

The ionization of H{sub 2} in a single attosecond extreme ultraviolet (XUV) pulse generates a nuclear wave packet in H{sub 2}{sup +}, which is entangled with the emitted photoelectron wave packet. The nuclear wave-packet dynamics can be observed by dissociating H{sub 2}{sup +} in a delayed IR laser pulse. If H{sub 2} is ionized by a sequence of XUV pulses of an attosecond pulse train, whether or not the corresponding sequence of nuclear wave packets in H{sub 2}{sup +} is detected as a coherent or incoherent superposition depends on whether and how the photoelectrons are observed. We simulate the nuclear dynamics in this XUV-pump-IR-probe scenario and analyze our numerical results for both single attosecond pump pulses and pump-pulse trains of different lengths and temporal spacings between individual XUV pulses. By superimposing nuclear wave packets in H{sub 2}{sup +} generated by individual pulses in the pump-pulse train incoherently, we calculate proton kinetic energy release spectra that are in good qualitative agreement with the recent experiment of Kelkensberg et al. [Phys. Rev. Lett. 103, 123005 (2009)].

• OSTI ID: 21408850
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BARYONS
CATIONS
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
EXTREME ULTRAVIOLET RADIATION
FERMIONS
HADRONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 2 PLUS
IONIZATION
IONS
KINETIC ENERGY
LASERS
MOLECULAR IONS
NONMETALS
NUCLEONS
PROBES
PROTONS
PULSES
QUANTUM ENTANGLEMENT
RADIATIONS
SPECTRA
ULTRAVIOLET RADIATION
WAVE PACKETS