Mass measurements among stable and unstable nuclei using the Canadian Penning TSrap mass spectrometer

使用加拿大 Penning TSrap 质谱仪测量稳定和不稳定原子核的质量

• 批准号: 216974-2011
• 负责人: Sharma, Kumar
• 金额: $ 12.31万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523648
• 关键词: Mass; measurements; among; stable; unstable

How the elements, from hydrogen to uranium, that make up our universe, were synthesized from the debris of the big bang continues to be a fascinating conundrum. While some success has been achieved in explaining the production of the light isotopes the mechanisms responsible for the production of the bulk of the heavier elements are still not clear. Calculations based on normal, quietly burning stars do not reproduce the observed abundances for these elements. It is thought that at least part of their production took place during explosive astrophysical events (supernovae and x-ray bursts etc.) that are powered by nuclear reactions among short-lived, radioactive nuclides at the limits of nuclear binding. The atomic masses of these nuclei are essential to understanding these processes because they determine the energy released and determine the path of the nuclear reaction chains that take place in these events.

从大爆炸的碎片中合成了从氢到铀的元素如何继续是一个令人着迷的难题。尽管在解释轻质同位素的产生方面取得了一些成功，但仍然尚不清楚负责大部分较重元素的生产机制。基于正常，悄悄燃烧的星星的计算不会再现这些元素的观察到的丰度。人们认为，至少部分生产发生在爆炸性的天体物理事件（超新星和X射线爆发等）中，这些事件是由短寿命，放射性核素在核结合限制的核反应中提供动力的。这些核的原子质量对于理解这些过程至关重要，因为它们决定了释放的能量并确定在这些事件中发生的核反应链的路径。