Precision spectroscopy of exotic nuclei

奇异核的精密光谱

• 批准号: SAPIN-2018-00023
• 负责人: Grinyer, Gwen
• 金额: $ 8.67万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=718896
• 关键词: Precision; spectroscopy; exotic; nuclei

My research uses beams of short-lived radioisotopes to study the atomic nucleus. Nuclei furthest from stability have often revealed spectacular new phenomena such as exotic structures and rare modes of radioactive decay. Understanding the fundamental forces between nucleons and how they evolve towards the most exotic nuclei are essential for attempting to explain the observed abundances of the elements in our universe and identifying the astrophysical sites where these nucleosynthesis processes may occur. Their study is crucial for guiding the development of theoretical nucleosynthesis and structure models and to improve their reliability in areas of the nuclear chart that cannot be accessed experimentally. The evolution of the nuclear force towards the extremes, how the elements are formed in the universe and the nature of physics at the electroweak scale are fundamental questions that have been identified in the Canadian subatomic physics long-range plan (2017-2021). Studies of the most exotic nuclei pose significant experimental challenges that are continually being addressed through upgrades and construction of large-scale rare-isotope beam facilities combined with the development of highly efficient and state-of-the-art detection systems. My research uses a variety of experimental techniques including direct and resonant nuclear reactions, precision nuclear decay studies and high-resolution gamma-ray spectroscopy to determine the properties of key nuclei that offer the best possible constraints for theoretical models. My experiments are conducted primarily at the TRIUMF facility in Canada and the Grand Accélérateur National d'Ions Lourds (GANIL) in France. I am presently the spokesperson for three experiments that have already been approved using existing infrastructure or infrastructure that is presently being developed from already secured external funding. I am the spokesperson and principal investigator of the active target and time projection chamber (ACTAR TPC), a novel detector development project that was funded by a 5-year/1.29M€ grant awarded by the European Research Council (ERC). First experiments with ACTAR TPC will begin in 2018 and will continue throughout the course of this research grant. This research grant will ensure the successful creation of my research program and provide the necessary support to my group by providing salaries for undergraduate summer research students, graduate students (Masters and Doctoral) and a postdoctoral fellow at the University of Regina. Travel funds for the group to be able participate in these experiments and present their results at national and international conferences and workshops are also included in the request.

我的研究使用短寿命放射性同位素束来研究原子核。离稳定状态最远的原子核经常会揭示出惊人的新现象，比如奇特的结构和罕见的放射性衰变模式。了解核子之间的基本作用力以及它们如何向最奇特的原子核演化，对于试图解释我们宇宙中观测到的元素丰度和确定这些核合成过程可能发生的天体物理位置至关重要。他们的研究对于指导理论核合成和结构模型的发展以及提高它们在无法通过实验获得的核图表领域的可靠性至关重要。加拿大亚原子物理学长期计划（2017-2021）确定了核力向极端方向的演变、宇宙中元素的形成方式以及电弱尺度下的物理本质等基本问题。