Energy Pathways in Solids

固体中的能量途径

• 批准号: 9510383
• 负责人: Raul Baragiola
• 金额: $ 31.2万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-12-01 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510383&HistoricalAwards=false
• 关键词: Energy; Pathways; Solids

9510383 Baragiola This project is a university-industry investigation of the evolution of electronic excitations in insulators. The excitations are formed in single events by energetic UV photons and electrons, and in dense cascades induced by keV and MeV ions. The goal is to understand the dynamics of energy transport in the form of holes, excitons and excited electrons in the femtosecond to nanosecond time scale, and to understand the mechanisms for converting the electronic energy in atomic motion (molecular dissociation, formation of new molecules, the ejection of particles from the surface, and creation of stable defects and phonons). The strategy is to study condensed gases as model systems, for which basic cross sections are well known. The research involves a collaboration with scientists from Bell Labs and the Univ. of Uppsala. It combines experiments that detect the ejected atoms, molecules, electrons, ions, and photons, and changes in the bombarded solids, together with molecular dynamics simulations. %%% This project is a university-industry investigation of the processes of energy dissipation in solids which are bombarded by energetic particles or ultraviolet light. The goal is to understand how energy flows into different channels, like emission of light or damage of the material, that will allow to find ways to modify the behavior. The research has applications in many areas, like radiation effects in biological tissue, lithography for manufacturing microelectronic circuits, radiation detectors and future generations of flat panel displays and lasers in the far ultraviolet. The studies incorporate laboratory work and computer simulations. ***

小行星9510383 这个项目是一个大学和工业界合作的研究，研究绝缘体中电子激发的演变。激发是由高能紫外光子和电子在单个事件中形成的，并在keV和MeV离子诱导的密集级联中形成。目标是了解飞秒到纳秒时间尺度内空穴、激子和激发电子形式的能量输运动力学，并了解原子运动中电子能量转换的机制（分子离解，新分子的形成，粒子从表面的喷射，以及稳定缺陷和声子的产生）。 我们的策略是研究冷凝气体作为模型系统，其基本横截面是众所周知的。这项研究涉及与贝尔实验室和乌普萨拉大学的科学家合作。 它结合了检测喷射的原子、分子、电子、离子和光子以及被轰击固体变化的实验，以及分子动力学模拟。 这个项目是一个大学和工业合作的研究项目，研究高能粒子或紫外光轰击固体时能量耗散的过程。我们的目标是了解能量如何流入不同的通道，如光的发射或材料的损坏，这将允许找到修改行为的方法。这项研究在许多领域都有应用，比如生物学中的辐射效应。 用于制造微电子电路、辐射探测器和未来几代平板显示器和远紫外激光器的光刻技术。这些研究包括实验室工作和计算机模拟。 ***