Bimodal velocity distribution of atoms released from nanosecond ultraviolet laser ablation

Journal Article · Sat Jan 15 00:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.71.045428· OSTI ID:20665075

Maul, J; Karpuk, S; Huber, G ^[1]

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1. Institut fuer Physik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)

We have investigated the velocity distributions of atoms released from a metallic gadolinium surface by UV laser ablation. The fluences of the nanosecond laser pulses were chosen for a pure release of neutrals and at a higher fluence level for the release of both neutrals and ions. In both cases a thermal Maxwell-Boltzmann slope has been observed for the low velocities, whereas for high velocities strong deviations from a thermal distribution have been seen. The observed velocity distribution has been explained by a bimodal structure including a thermal phase and a shockwave driven 'blow-off' phase.

• OSTI ID: 20665075
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 71, Issue 4; Other Information: DOI: 10.1103/PhysRevB.71.045428; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABLATION
DISTRIBUTION
GADOLINIUM
LASERS
PULSES
SURFACES
ULTRAVIOLET RADIATION
VELOCITY