Consequences of combined chemical and radiative exposure of solid surfaces

J. Thomas Dickinson; Mary L. Dawes; Khin Hla Nwe; Steve C. Langford

doi:10.1117/12.470616

18 June 2002 Consequences of combined chemical and radiative exposure of solid surfaces

J. Thomas Dickinson, Mary L. Dawes, Khin Hla Nwe, Steve C. Langford

Author Affiliations +

Proceedings Volume 4637, Photon Processing in Microelectronics and Photonics; (2002) https://doi.org/10.1117/12.470616
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

We present studies of the consequences of simultaneous exposure of inorganic single crystals to radiation and water. The first case consists of a biomineral namely CaHPO₄ 2H₂O which is a wide band gap, hydrated inorganic single crystal. We examine the laser induced ion and neutral emissions accompanying 248-cm excimer laser radiation. Both types of emission are several orders of magnitude higher following exposure to 2 keV electrons at current densities of 200 (mu) A/cm² and dose of 10²- 10³ mC/cm². We show that the enhancements in emission are strongly correlated with e-beam induced morphology changes on this unusual surface. We then examine similar effects on 'dry' crystals such as NaCl and NaNO₃ which are exposed to 10^-5 Pa partial pressures of H₂O. Again dramatic enhancements in radiation induced emissions are exhibited along with the generation of unique morphological structures with nanometer scale dimensions.

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J. Thomas Dickinson, Mary L. Dawes, Khin Hla Nwe, and Steve C. Langford "Consequences of combined chemical and radiative exposure of solid surfaces", Proc. SPIE 4637, Photon Processing in Microelectronics and Photonics, (18 June 2002); https://doi.org/10.1117/12.470616

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