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Space-charge-induced acceleration of ions emitted by laser-irradiated surfaces (1995)

Peurrung, A. J. ; Cowin, J. P. ; Teeter, G. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 78 (1995), S. 481-488

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Pulsed-laser-irradiated surfaces sometimes emit positive ions at energies several volts higher than one would expect, even at modest (〈0.1 J/cm2) fluences. A mechanism that can account for this phenomenon is discussed. Intense surface photoemission of electrons during the laser pulse leads to the formation of a space-charge layer near the surface. If the laser fluence were constant, the ions would accelerate and subsequently decelerate as they pass through this steady potential well. As the laser pulse ends, however, some ions may undergo extended acceleration as this space-charge layer moves away from the surface. The maximum possible ion acceleration is analytically calculated and the acceleration for a range of realistic experimental parameters is numerically predicted. © 1995 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.360631

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Immobility of protons in ice from 30 to 190 K (1999)

Tsekouras, A. A. ; Iedema, M. J. ; Wu, K. ; [et al.]

[s.l.] : Macmillan Magazines Ltd.

Nature 398 (1999), S. 405-407

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] The anomalously fast motion of hydronium ions (H3O+) in water is often attributed to the Grotthuss mechanism, whereby protons tunnel from one water molecule to the next. This tunnelling is relevant to proton motion through water in restricted geometries, such as ...