Synchrotron radiation induced nano-X-ray fluorescence analyses (nano-SXRF) and nano-X-ray diffraction (nano-SXRD) applied on contemporary interstellar dust particles

同步辐射诱导纳米 X 射线荧光分析 (nano-SXRF) 和纳米 X 射线衍射 (nano-SXRD) 应用于当代星际尘埃颗粒

• 批准号: 145839135
• 负责人: Professor Dr. Frank Erich Brenker
• 金额: --
• 依托单位: Abteilung Petrologie und Geochemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/145839135?language=en
• 关键词: Synchrotron; radiation; induced; nano; ray

The STARDUST mission launched by NASA (in 1999 and returned 2006) provided cometary particles sampled in the coma of comet Wild2 and interstellar grains from an interstellar particle stream, which crosses our solar system (Brownlee et al. 2003). Wild 2 particles have already been subject to numerous investigations. Non destructive preliminary examinations such as nano - SXRF and nano – SXRD applied on the unique, submicron - sized interstellar particles with focus on chemical composition and structure started in 2010 as the main target of only a few approved research teams in the framework of the “Interstellar Preliminary Examination” – Team (ISPE) and will continue during the next years. I am head of an international research team, whose members already performed successful examinations on interstellar grains as part of the “Interstellar Preliminary Examination” – Team (ISPE) whose members are in charge of all preliminary examinations on STARDUST interstellar samples. For the first time pristine contemporary matter from the interstellar medium is sampled and brought back to Earth, which now offers unique fresh material, prevented from any terrestrial alteration. The detailed study of these unique grains applying nondestructive analytical techniques will provide information of yet unknown Interstellar Medium (ISM) processes and to test or confirm theoretical models and astronomical observations. During the recent funded period the first 4 ever studied contemporary interstellar candidate grains were identified and characterized.

由美国航天局发射的星尘使命（1999年发射，2006年返回）提供了在怀尔德2号彗星的彗发中采样的彗星粒子和来自穿越我们太阳系的星际粒子流的星际颗粒（布朗利等人，2003年）。Wild 2粒子已经进行了大量的研究。非破坏性的初步检查，如纳米SXRF和纳米SXRD应用于独特的，亚微米大小的星际粒子，重点是化学成分和结构，开始于2010年，作为“星际初步检查”团队（ISPE）框架内少数批准的研究团队的主要目标，并将在未来几年继续进行。我是一个国际研究小组的负责人，该小组的成员已经成功地对星际颗粒进行了检查，这是“星际初步检查”小组（ISPE）的一部分，该小组的成员负责对STARDUST星际样品进行所有初步检查。这是第一次从星际介质中采样原始的当代物质并带回地球，现在地球提供了独特的新鲜物质，防止任何地球上的改变。应用非破坏性分析技术对这些独特颗粒进行详细研究将提供未知的星际介质（ISM）过程的信息，并测试或确认理论模型和天文观测。在最近的资助期间，第一批4个被研究的当代星际候选颗粒被确定和表征。