TENSAR - Theory and Experiment for Nuclear Structure, Astrophysics & Reactions

TENSAR - 核结构、天体物理学的理论与实验

基本信息

  • 批准号:
    ST/Y000358/1
  • 负责人:
  • 金额:
    $ 303.23万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2024
  • 资助国家:
    英国
  • 起止时间:
    2024 至 无数据
  • 项目状态:
    未结题

项目摘要

For a hundred years, atomic nuclei have been probed more or less exclusively by studying collisions between stable beams and stable targets. This restricted the nuclei that could be studied to just a just a small fraction of those that are thought to exist. Most of the nuclei important to making all of the elements (in various stellar processes) have for example been inaccessible to experiment. The major thrust in nuclear physics worldwide, and a key priority in the UK's programme, is to reach out and study these exotic nuclei by using beams produced from short-lived radioactive isotopes. This in turn reveals that nuclear structure is not always like it seems to be for the stable nuclei, and nuclei are found to have surprising trends in stability and to have different shapes that will affect reaction rates inside stars and supernovae. At Surrey we take the UK priorities and the new opportunities very much to heart, and we seek out and lead programmes at the world's best facilities for making radioactive beams. These facilities - as well as the research effort - are international in scale. Surrey builds and runs innovative experimental equipment at these facilities. The present grant request is focused on the exploitation of the best capabilities at the best laboratories, with Surrey taking the leading role.Experimental progress is intimately linked with theory, and the development of novel and better theoretical approaches are a hallmark of the Surrey group. An outstanding feature of the group as a whole, which is key to our research plans and acknowledged as a rare and valuable strength, is our powerful blend of theoretical and experimental capability.Our science goals are aligned with current STFC strategy for nuclear physics as expressed in the STFC Nuclear Physics Advisory Panel's road map. We wish to understand the boundaries of nuclear existence, i.e. the limiting conditions that enable neutrons and protons to bind together to form nuclei. This limit is very sensitive to the properties of the nuclear force. It is unknown whether, and to what extent, the neutrons and protons can show different collective behaviour (driving to non-spherical shapes) or even how many neutrons can bind to a given number of protons. These features contribute to deciding how stars explode. To tackle these issues, we need to develop a more sophisticated understanding of the nuclear force, then we need more powerful theories that can build this understanding into the calculations, and we need experimental information about nuclei with unusual numbers of neutrons relative to protons so that we can test our theoretical ideas. Therefore, theory and experiment go hand-in-hand as we push forward towards the nuclear limits.An overview of nuclear binding reveals that about one half of predicted nuclei have never been observed, and the vast majority of this unknown territory involves nuclei with an excess of neutrons. Much of our activity addresses this "neutron rich" territory, exploiting the new capabilities made possible with radioactive beams and exploiting advances in computational power and analytical theories to bring superior new theoretical tools to bear on the latest observations. Our principal motivation is the basic science and the STFC "big questions", and we contribute strongly to the world sum of knowledge. The radiation-detector advances that our work drives can be incorporated in medical diagnosis and in environmental management. We engage strongly with the National Physical Laboratory on these topics. Our work also relates to national nuclear security and we have strong links in this area with AWE. We share staff and students with the NPL and with AWE. We provide excellent training for our research students and staff, many of whom go on to work in the nuclear power industry, helping to fill the current skills gap. Furthermore, we are enthusiastic about sharing our research, and actively pursue a public engagement agenda.
一百年来,原子核的探测或多或少都是通过研究稳定光束和稳定目标之间的碰撞来进行的。这就限制了可以被研究的原子核只是被认为存在的原子核的一小部分。例如,大多数对制造所有元素(在各种恒星过程中)很重要的原子核都无法进行实验。世界范围内核物理学的主要推动力,以及英国计划的一个关键优先事项,是通过使用短寿命放射性同位素产生的光束来接触和研究这些奇异的原子核。这反过来又揭示了核结构并不总是像稳定核那样,并且发现核具有令人惊讶的稳定性趋势,并且具有不同的形状,这将影响恒星和超新星内部的反应速率。在萨里,我们把英国的优先事项和新的机会放在心上,我们在世界上最好的放射性束制造设施中寻找和领导项目。这些设施以及研究工作都具有国际规模。萨里在这些设施中建造和运行创新的实验设备。目前的赠款申请重点是利用最好的实验室的最佳能力,萨里发挥主导作用。实验进展与理论密切相关,开发新颖和更好的理论方法是萨里小组的一个标志。作为一个整体,该小组的一个突出特点是理论和实验能力的强大融合,这是我们研究计划的关键,也是公认的罕见和宝贵的优势。我们的科学目标与STFC核物理顾问小组路线图中表达的当前STFC核物理战略保持一致。我们希望了解核存在的边界,即使中子和质子结合在一起形成原子核的限制条件。这个极限对核力的性质非常敏感。目前还不清楚中子和质子是否以及在多大程度上可以表现出不同的集体行为(驱动到非球形),甚至有多少中子可以与给定数量的质子结合。这些特征有助于决定恒星如何爆炸。为了解决这些问题,我们需要对核力有更深入的了解,然后我们需要更强大的理论,可以将这种理解纳入计算,我们需要关于中子相对于质子数量不寻常的原子核的实验信息,以便我们可以测试我们的理论想法。因此,当我们向核极限迈进时,理论和实验是齐头并进的。核束缚的概述表明,大约一半的预测核从未被观察到,而这个未知领域的绝大多数涉及中子过剩的核。我们的大部分活动都是针对这一“中子丰富”的领域,利用放射性束的新能力,利用计算能力和分析理论的进步,为最新的观测带来上级新的理论工具。我们的主要动机是基础科学和STFC“大问题”,我们为世界知识总量做出了巨大贡献。辐射探测器的进步,我们的工作驱动器可以纳入医疗诊断和环境管理。我们与国家物理实验室就这些主题进行了密切合作。我们的工作还涉及国家核安全,我们在这一领域与AWE有着密切的联系。我们与NPL和AWE共享员工和学生。我们为我们的研究生和工作人员提供优秀的培训,其中许多人继续在核电行业工作,帮助填补目前的技能缺口。此外,我们热衷于分享我们的研究,并积极追求公众参与议程。

项目成果

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Wilton Catford其他文献

Wilton Catford的其他文献

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{{ truncateString('Wilton Catford', 18)}}的其他基金

Advancing Nuclear Science via Theory and Experiment
通过理论和实验推进核科学
  • 批准号:
    ST/V001108/1
  • 财政年份:
    2021
  • 资助金额:
    $ 303.23万
  • 项目类别:
    Research Grant
Nuclear Physics at the Extremes: Theory & Experiment
极端核物理:理论
  • 批准号:
    ST/P005314/1
  • 财政年份:
    2017
  • 资助金额:
    $ 303.23万
  • 项目类别:
    Research Grant
TRIUMF travel for experiment S1107 with 24Na
使用 24Na 进行实验 S1107 的 TRIUMF 行程
  • 批准号:
    ST/I005866/1
  • 财政年份:
    2010
  • 资助金额:
    $ 303.23万
  • 项目类别:
    Research Grant
TRIUMF travel for experiment S1107
实验用TRIUMF旅行S1107
  • 批准号:
    ST/H003916/1
  • 财政年份:
    2009
  • 资助金额:
    $ 303.23万
  • 项目类别:
    Research Grant
TIARA - Surrey Emergency Bridging Funding
TIARA - 萨里紧急过渡资金
  • 批准号:
    PP/F000715/1
  • 财政年份:
    2007
  • 资助金额:
    $ 303.23万
  • 项目类别:
    Research Grant

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通过将实验和理论与机器学习相结合,筛选用于能源和生物成像应用的环保量子纳米晶体
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