RUI: The Role of Low-Energy Electrons in High-Energy Radiolysis

在化学系化学结构、动力学和机理计划的支持下，韦尔斯利学院的Christopher Arumainayagam教授和他的本科生将利用红外光谱、程序升温脱附(TPD)和等温电子刺激脱附(ESD)来表征低能电子对卤代甲烷、甲醇和六酮钼薄膜的影响。这项研究的基本假设是，暴露在电离辐射或高能粒子下的材料中发生的大部分损害是由于二次电子，虽然每个粒子的能量较低，但相对于初级电离光子或粒子，产生的能量要丰富得多。这项研究的结果不仅将推进电子诱导反应的特定化学领域，而且将与其他科学和技术领域相关，包括我们对生物系统中辐射损伤的理解、微电子技术的电子束光刻、新的环境修复技术和大气反应循环。重要的是，这些调查还将为本科生科学家的研究培训提供工具。

In this project supported by the Chemical Structure, Dynamics and Mechanisms Program of the Chemistry Division, Professor Christopher Arumainayagam of Wellesley College and his undergraduate students will employ infrared spectroscopy, temperature programmed desorption (TPD), and isothermal electron stimulated desorption (ESD) to characterize the effects of low-energy electrons on thin films of halomethanes, methanol and molybdenum hexacarbonyl. The underlying hypothesis of the research is that much of the damage that occurs in materials exposed to ionizing radiation or high energy particles is due to secondary electrons which, while lower in energy per particle, are generated in much greater abundance relative to the primary ionizing photon or particle. The results of this research will not only advance the specific chemistry field of electron-induced reactions, but will be relevant to other areas of science and technology, including our understanding of radiation damage in biological systems, electron beam lithography for microelectronics technology, new environmental remediation techniques, and atmospheric reaction cycles. Importantly, these investigations will also provide a vehicle for research training of undergraduate scientists.