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.

NASA发射的星尘任务(1999年和2006年返回)提供了Wild2彗星彗尾中的彗星颗粒样本和横跨太阳系的星际粒子流中的星际颗粒(Brownlee等人)。2003年)。野生的2粒子已经受到了大量的研究。对独特的亚微米级星际粒子进行的非破坏性初步检查，如纳米SXRF和纳米SX射线衍射仪，从2010年开始作为“星际初步检查”小组框架内少数几个获准研究小组的主要目标，并将在今后几年继续进行。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，该小组的成员负责所有关于星尘星际样本的初步检查。来自星际介质的原始当代物质第一次被取样并带回地球，现在地球提供了独特的新鲜物质，防止了任何地球上的改变。应用无损分析技术对这些独特的颗粒进行详细研究，将提供未知星际介质(ISM)过程的信息，并验证或证实理论模型和天文观测。在最近的资助期间，首次对当代星际候选颗粒进行了研究，并对其进行了鉴定和表征。