Gamma-Ray Spectroscopy at the Isotope Separator and Accelerator (ISAC)

同位素分离器和加速器 (ISAC) 的伽马射线能谱分析

• 批准号: SAPPJ-2017-00026
• 负责人: Svensson, Carl
• 金额: $ 121.66万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=666275
• 关键词: Gamma; Ray; Spectroscopy; Isotope; Separator

The atoms of all elements are composed of electrons orbiting a tiny massive core, the atomic nucleus. The nucleus is, in turn, composed of smaller objects called protons and neutrons or, collectively, nucleons. These nucleons interact with each other by all of the known forces of nature, making the atomic nucleus an ideal "laboratory" for studying a wide range of topics of basic scientific interest, from the properties of the fundamental interactions of subatomic particles to how the nucleus as a whole behaves as a collective entity.******The use of the atomic nucleus as a laboratory for basic science research has been constrained by the small subset of the possible combinations of protons and neutrons (isotopes) occurring naturally on Earth. A great expansion of this field of science is, however, being made possible by the development of research facilities such as the Isotope Separator and Accelerator (ISAC), and its new expansion to the Advanced Rare IsotopE Laboratory (ARIEL) at the TRIUMF facility in Vancouver, British Columbia. ISAC produces world-record intensities of short-lived isotopes and delivers them to research scientists in the form of high-quality ion beams. In the present research, the high-frequency light (gamma-rays), neutrons, and charged particles emitted when rare isotopes produced at ISAC decay or interact with other nuclei will be measured in state-of-the-art detector arrays known as GRIFFIN, TIGRESS, and SPICE, designed and constructed by a collaboration of researchers from Canadian universities and TRIUMF. These measurements will support a broad program of basic science research, ranging from precision measurements of the weak interactions of subatomic particles called quarks, through studies aimed at a better understanding of how the chemical elements are synthesized in the explosions of stars, to experiments designed to unravel how the atomic nucleus responds to the stresses of unusual neutron-to-proton ratios. The world leading combination of the ISAC facility, its upgrade to ARIEL, and the sophisticated detection systems employed in these studies, will ensure that Canadian scientists remain at the forefront of the emerging field of rare isotope research.**

所有元素的原子都是由围绕一个微小的大质量核心--原子核--运行的电子组成的。原子核又是由称为质子和中子或统称为核子的较小物体组成的。这些核子通过所有已知的自然力相互作用，使原子核成为研究一系列基本科学感兴趣的课题的理想“实验室”，从亚原子粒子的基本相互作用的性质到原子核作为一个整体是如何表现的。原子核作为基础科学研究的实验室一直受到地球上自然出现的质子和中子(同位素)可能组合的一小部分的限制。然而，这一科学领域的巨大扩展是由于研究设施的发展，如同位素分离器和加速器(ISAC)，以及它在不列颠哥伦比亚省温哥华的TRIUMF设施的高级稀有同位素实验室(ARIEL)的新扩展。ISAC生产的短寿命同位素的强度达到世界纪录，并以高质量离子束的形式提供给研究科学家。在目前的研究中，当ISAC产生的稀有同位素衰变或与其他原子核相互作用时发出的高频光(伽马射线)、中子和带电粒子将在被称为Griffin、Tigress和SPICE的最先进的探测器阵列中进行测量，该阵列由加拿大大学和TRIUMF的研究人员合作设计和建造。这些测量将支持一个广泛的基础科学研究计划，从精确测量被称为夸克的亚原子粒子的弱相互作用，到旨在更好地了解恒星爆炸时化学元素是如何合成的研究，再到旨在揭示原子核如何应对异常中质子比压力的实验。ISAC设施的世界领先组合、其对Ariel的升级以及在这些研究中采用的复杂检测系统，将确保加拿大科学家保持在新兴稀有同位素研究领域的前沿。**