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首页> 外文会议>Conference on Photon Processing in Microelectronics and Photonics Jan 21-24, 2002 San Jose, USA >Consequences of combined chemical and radiative exposure of solid surfaces
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Consequences of combined chemical and radiative exposure of solid surfaces

机译：固体表面化学和辐射联合照射的后果

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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 CaHPO_4 2H_2O (brushite) which is a wide band gap, hydrated inorganic single crystal. We examine the laser induced ion and neutral emissions accompanying 248-nm excimer laser radiation. Both types of emission are several orders of magnitude higher following exposure to 2 keV electrons at current densities of 200 μA/cm~2 and doses of 10~2-10~3 mC/cm~2. We show the that the enhancements in emission are strongly correlated with e-beam induced morphology changes (including recrystallization) on this unusual surface. We then examine similar effects on "dry" crystals such as NaCl and NaNO_3 which are exposed to 10~(-5) Pa partial pressures of H_2O. Again dramatic enhancements in radiation induced emissions are exhibited along with the generation of unique morphological structures with nanometer scale dimensions.
机译：我们目前对无机单晶同时暴露于辐射和水的后果进行研究。第一种情况是由生物矿物，即CaHPO_4 2H_2O（硬脂石）组成，CaHPO_4 2H_2O是宽带隙的水合无机单晶。我们研究了伴随248 nm准分子激光辐射的激光诱导离子和中性发射。在电流密度为200μA/ cm〜2且剂量为10〜2-10〜3 mC / cm〜2的情况下，暴露于2 keV电子后，两种类型的发射都高出几个数量级。我们表明，发射的增强与这种不寻常表面上电子束诱导的形态变化（包括重结晶）密切相关。然后，我们研究了对“干燥”晶体（如NaCl和NaNO_3）的类似作用，这些晶体暴露于H_2O的10〜（-5）Pa分压下。辐射诱导发射的再次显着增强以及纳米尺度尺寸的独特形态结构的产生。

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