Rare Gases and Other Simple Systems at High Pressure

高压下的稀有气体和其他简单系统

• 批准号: 9510333
• 负责人: William Daniels
• 金额: $ 25.5万
• 依托单位: University of Delaware
• 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: 1995-11-01 至 2000-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510333&HistoricalAwards=false
• 关键词: Rare; Gases; Other; Simple; Systems

9510333 Daniels This program is directed toward measurement of electronic excited state energies and conduction band gaps in compressed cryocrystals such as solid argon and solid hydrogen using nonlinear optical spectroscopy. These measurements are relevant to deep planetary atmospheres problems and to ongoing questions related to a possible insulator-metal transition in highly compressed hydrogen. The nonlinear optics methods used are required to excite the deep ultraviolet states involved, while probing with optical beams transmittable by pressure cell windows. %%% Properties of crystals such as solid hydrogen and solid argon are crucial to understanding of phenomena in systems as diverse as the deep atmosphere of the planet Jupiter or the change of materials from electrically insulating to conducting when compressed to extremely high pressures. Fundamental to this understanding is a knowledge of how electrons behave at very pressures. This program is applying innovative methods using high-powered laser light pulses to measure electron energies in compressed simple systems including solid hydrogen and argon. ***

9510333 Daniels 该程序旨在使用非线性光谱测量压缩低温晶体（例如固体氩和固体氢）中的电子激发态能量和传导带隙。 这些测量与深层行星大气问题以及与高度压缩氢气中可能的绝缘体-金属转变有关的持续问题有关。 所使用的非线性光学方法需要激发所涉及的深紫外态，同时用可通过压力盒窗口传输的光束进行探测。 %%% 固体氢和固体氩等晶体的特性对于理解木星深层大气等不同系统中的现象或材料在压缩到极高压力时从电绝缘到导电的变化至关重要。这种理解的基础是了解电子在高压下的行为方式。该计划正在应用创新方法，使用高功率激光脉冲来测量压缩简单系统（包括固体氢和氩）中的电子能量。 ***