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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Measurement of the energy dependence of x-ray-induced decomposition of potassium chlorate
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Measurement of the energy dependence of x-ray-induced decomposition of potassium chlorate

机译：X射线诱导的氯酸钾分解的能量依赖性测量

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摘要

We report the first measurements of the X-ray induced decomposition of KClO_3as a function of energy in two experiments. KClO_3was pressurized to 3.5 GPa and irradiated with monochromatic synchrotron X-rays ranging in energy from 15 to 35 keV in 5 keV increments. A systematic increase in the decomposition rate as the energy was decreased was observed, which agrees with the 1/E3trend for the photoelectric process, except at the lowest energy studied. A second experiment was performed to access lower energies (10 and 12 keV) using a beryllium gaske resonance near 15 keV or 0.83 ? maximizing the chemical decomposition rate. A third experiment was performed using KIO_3to ascertain the anionic dependence of the decomposition rate, which was observed to be far slower than in KClO_3, suggesting that the O-O distance is the critical factor in chemical reactions. These results will be important for more efficiently initiating chemical decomposition in materials using selected X-ray wavelengths that maximize decomposition to aid useful hard X-ray-induced chemistry and contribute understanding of the mechanism of X-ray-induced decomposition of the chlorates.
机译：我们在两个实验中报告了X射线诱导的KClO_3分解作为能量的函数的首次测量。将KClO_3加压至3.5 GPa，并以15 keV至35 keV的能量以5 keV的增量照射单色同步加速器X射线。观察到随着能量的降低，分解速率有系统地增加，这与光电过程的1 / E3趋势一致，除了在最低能量下研究。进行了第二次实验，使用15 keV或0.83？V附近的铍气体共振来获得较低的能量（10和12 keV）。最大程度地提高化学分解率。使用KIO_3进行的第三项实验确定了分解速率的阴离子依赖性，观察到它远比在KClO_3中慢，这表明O-O距离是化学反应的关键因素。这些结果对于使用选定的X射线波长更有效地引发材料中的化学分解非常重要，该波长最大化地分解，以帮助有用的硬X射线诱导的化学反应，并有助于理解X射线诱导的氯酸盐分解的机理。

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