Interaction of wide band gap single crystals with 248 nm excimer laser radiation. XII. The emission of negative atomic ions from alkali halides

Kimura, Kenichi; Langford, S. C.; Dickinson, J. T.
December 2007
Journal of Applied Physics;Dec2007, Vol. 102 Issue 11, p114904
Academic Journal
Many wide band gap materials yield charged and neutral emissions when exposed to sub-band-gap laser radiation at power densities below the threshold for optical breakdown and plume formation. In this work, we report the observation of negative alkali ions from several alkali halides under comparable conditions. We observe no evidence for negative halogen ions, in spite of the high electron affinities of the halogens. Significantly, the positive and negative alkali ions show a high degree of spatial and temporal overlap. A detailed study of all the relevant particle emissions from potassium chloride (KCl) suggests that K- is formed by the sequential attachment of two electrons to K+.


Related Articles

  • Numerical simulation of isotope production for positron emission tomography with laser-accelerated ions. Lefebvre, Erik; d’Humières, Emmanuel; Fritzler, Sven; Malka, Victor // Journal of Applied Physics;12/1/2006, Vol. 100 Issue 11, p113308 

    The experimental demonstration of laser acceleration of ions to multi-MeV energies with short, intense laser pulses has spurred the prospect of using this ion source for medical isotope production. Using numerical models for laser-plasma interaction and ion acceleration, then for ion transport...

  • Effects of 2 mass % Si admixture in a laser-produced Fe plasma. Krása, Josef; Láska, Leoš; Rohlena, Karel; Velyhan, Andriy; Lorusso, Antonella; Nassisi, Vincenzo; Czarnecka, Agata; Parys, Piotr; Ryć, Leszek; Wolowski, Jerzy // Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p191503 

    Emission of multiply charged ions and soft x-rays from the plasmas produced by laser pulses focused on (111) surface of Fe and Fe-2 mass % Si single crystals is investigated for wavelengths of 1064 and 248 nm and intensities up to ≈1×1010 W/cm2. It is demonstrated that the Si admixture...

  • Femtosecond laser and swift-ion damage in lithium niobate: A comparative analysis. García-Navarro, A.; Agulló-López, F.; Olivares, J.; Lamela, J.; Jaque, F. // Journal of Applied Physics;May2008, Vol. 103 Issue 9, p093540 

    Relevant damage features associated with femtosecond pulse laser and swift-ion irradiations on LiNbO3 crystals are comparatively discussed. Experiments described in this paper include irradiations with repetitive femtosecond-laser pulses (800 nm, 130 fs) and irradiation with O, F, Si, and Cl...

  • Optical properties and ultrafast optical nonlinearity of Yb3+ doped sodium borate and bismuthate glasses. Karthikeyan, B.; Suchand Sandeep, C. S.; Cha, Jaemine; Takebe, Hiromichi; Philip, Reji; Mohan, S. // Journal of Applied Physics;May2008, Vol. 103 Issue 10, p103509 

    In this paper, we report the optical and ultrafast nonlinear optical properties of Yb3+ doped sodium borate and bismuthate glasses. The glasses have been prepared through the melt quench technique. Optical absorption measurements show compositional dependent absorption spectrum of Yb3+, which is...

  • Theoretical investigation of the spectrum and conversion efficiency of short wavelength extreme-ultraviolet light sources based on terbium plasmas. Sasaki, Akira; Nishihara, Katsunobu; Sunahara, Atsushi; Furukawa, Hiroyuki; Nishikawa, Takeshi; Koike, Fumihiro // Applied Physics Letters;12/6/2010, Vol. 97 Issue 23, p231501 

    The emission spectrum and conversion efficiency of laser-produced terbium plasmas are theoretically investigated on the basis of computational atomic data. The theoretically calculated spectrum reproduces the main peak of observed spectrum at λ=6.5 nm, which originates from 4d-4f transitions...

  • Investigating the breakup dynamics of dihydrogen sulfide ions recombining with electrons. Hellberg, Fredrik; Zhaunerchyk, Vitali; Ehlerding, Anneli; Geppert, Wolf D.; Larsson, Mats; Thomas, Richard D.; Bannister, Mark E.; Bahati, Eric; Vane, C. Randy; Österdahl, Fabian; Hlavenka, Petr; af Ugglas, Magnus // Journal of Chemical Physics;6/8/2005, Vol. 122 Issue 22, p224314 

    This paper presents results concerning measurements of the dissociative recombination (DR) of dihydrogen sulfide ions. In combination with the ion storage ring CRYRING an imaging technique was used to investigate the breakup dynamics of the three-body channel in the DR of 32SD2+. The two...

  • Laser beam filamentation and stochastic electron heating at upper hybrid layer. Sharma, Prerana; Mahmoud, S. T.; Gupta, M. K.; Sharma, R. P. // Physics of Plasmas;Apr2008, Vol. 15 Issue 4, p042105 

    This paper presents an investigation of the filamentation (single hot spot) of an ultrahigh-power laser beam in homogeneous plasma. Upper hybrid wave (UHW) coupling in these filaments has been studied. We have discussed two extreme scenarios: (1) The laser beam has ultrahigh power so that...

  • On the control of product yields in the photofragmentation of deuteriumchlorid ions (DCl+). Korolkov, Mikhail V.; Weitzel, Karl-Michael // Journal of Chemical Physics;10/22/2005, Vol. 123 Issue 16, p164308 

    The prospect of controlling the photofragmentation of deuterium chloride ions (DCl+) via strong ultrashort IR laser pulses has been investigated by a numerical solution of coupled Schrödinger equations. The calculations provide evidence that the ratio of product ion yields Cl+ versus D+ can...

  • ADSORPTION REACTION OF POLAR ORGANIC MOLECULES ON ${\rm Si}^+_n$ CLUSTER IONS. Nakagawara, Wakana; Tsunoyama, Hironori; Furuya, Ari; Misaizu, Fuminori; Ohno, Koichi // International Journal of Modern Physics B: Condensed Matter Phys;7/10/2005, Vol. 19 Issue 15-17, p2502 

    We have examined chemical reactions of small silicon cluster ions ${\rm Si}^+_n$ for n = 7 - 16 with polar organic molecules M (M = CH3CN, CD3OD, C2H5CN, and C2H5OH). The intensities of the adsorption products ${\rm Si}_n {\rm M}^+_m$ for m = 1 and 2 were investigated as a function of n. We...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics