Ab initio theory of light nuclei

轻核从头算理论

• 批准号: 401945-2011
• 负责人: Navratil, Petr
• 金额: $ 5.46万
• 依托单位: TRIUMF
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573107
• 关键词: Ab; initio; theory; light; nuclei

Atomic nuclei are quantum many-body systems made by protons and neutrons interacting with forces that originate from the fundamental theory of Quantum Chromo-dynamics. The exact treatment of nuclei starting from the constituent nucleons and the inter-nucleon interactions among them has been a long-standing goal in nuclear physics. The objective of this project is to develop a predictive ab initio theory of nuclear structure and nuclear reactions for light nuclei. Such a theory is needed for the understanding of exotic nuclei investigated at rare isotope facilities like ISAC at TRIUMF, for the understanding of nuclear reactions important for astrophysics that are hard or impossible to measure at the low energies at which they occur in the Cosmos, as well as for the study of fusion reactions important for the future energy generation. At the same time, it provides a feedback on the quality of inter-nucleon iteractions used as input to these calculations and ultimately helps to improve our knowledge of the nucleon-nucleon interaction, and in particular of the still not completely understood three-nucleon interaction. In this proposal, we combine an ab nitio nuclear structure approach capable to describe bound states of light nuclei with a microscopic cluster method developed to describe reactions of nuclear clusters. The resulting method provides a unified description of both bound and unbound nuclear states starting from inter-nucleon interactions among protons and neutrons. Postdoctoral researchers, graduate students as well as undergraduate students will contribute to this project. The success of this proposal has a potential strong scientific impact on the international nuclear theory community. It will strengthen the Canadian efforts in nuclear theory and contribute to the education of future Canadian physicists.

原子核是由质子和中子与源自量子色动力学基本理论的力相互作用形成的量子多体系统。从组成核子及其核子间相互作用开始精确处理原子核一直是核物理学的长期目标。 该项目的目标是开发轻核核结构和核反应的从头开始预测理论。这样的理论对于理解在 TRIUMF 的 ISAC 等稀有同位素设施中研究的奇异核、理解对天体物理学很重要的核反应（这些反应在宇宙中发生的低能量下很难或不可能测量）以及研究对未来能源产生很重要的聚变反应都需要这样的理论。同时，它提供了有关核子间迭代质量的反馈，用作这些计算的输入，并最终有助于提高我们对核子-核子相互作用的了解，特别是对尚未完全理解的三核子相互作用的了解。在该提案中，我们将能够描述轻核束缚态的从头算核结构方法与开发用于描述核团簇反应的微观团簇方法相结合。由此产生的方法提供了从质子和中子之间的核子间相互作用开始的束缚和非束缚核态的统一描述。 博士后研究人员、研究生以及本科生将为该项目做出贡献。该提案的成功对国际核理论界具有潜在的强大科学影响。它将加强加拿大在核理论方面的努力，并为未来加拿大物理学家的教育做出贡献。