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MRI: Development of the SABRE Silicon Array for Branching Ratio Experiments

MRI：开发用于分支比实验的 SABRE 硅阵列

基本信息

批准号：
2117687
负责人：
Daniel Bardayan
金额：
$ 50.53万
依托单位：
University of Notre Dame
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2117687&HistoricalAwards=false
关键词：
MRI Development SABRE Silicon Array

项目摘要

Two of the most compelling questions in science are: how were the elements created and how are they continuing to be synthesized today. Understanding the origins of the elements explains the origins of Earth. Exotic nuclei are often created in the astrophysical cauldrons of explosive alchemy, and the probabilities that these newly synthesized nuclei can retain the charged particles that created them determines whether heavier nuclei can be formed in the process. The origin of the elements is ultimately tied to this competition between particle emission and absorption. This MRI development award will provide funds to build SABRE (Silicon Array for Branching Ratio Experiments) that will be combined with the unique TriSol facility at the Notre Dame Nuclear Science Lab (NSL) – and that new instrumentation will be used to measure particle-emission probabilities for nuclei critical to explosive nucleosynthesis.Proton and alpha-induced reactions on exotic nuclei dominate the heavy-element nucleosynthesis in explosive environments such as novae, supernovae, and X-ray bursts. The new SABRE array in the TriSol facility at NSL will allow scientists to measure proton and α branching ratios as small as 10e−5. The key feature of this spectrometer is that it will allow experimenters to select specific reaction products that identify individual states of the resulting nucleus in a spectrum that is essentially background free. That capability is what will allow the group to measure such low branching ratios and have significant impacts on understanding capture reactions at stellar temperatures. A prime example is the 15O(α, γ)19Ne reaction because of its key importance in triggering heavy element nucleosynthesis via the rapid proton-capture process.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

科学中最引人注目的两个问题是：元素是如何被创造出来的，以及它们今天是如何继续被合成的。了解元素的起源可以解释地球的起源。奇异的原子核通常是在爆炸炼金术的天体物理学坩埚中产生的，这些新合成的原子核能够保留创造它们的带电粒子的概率决定了在这个过程中是否可以形成更重的原子核。元素的起源最终与粒子发射和吸收之间的竞争有关。这个MRI开发奖将提供资金，以建立SABRE（硅阵列的分支比实验），将结合独特的TriSol设施在圣母院核科学实验室（NSL）-和新的仪器将用于测量粒子发射概率的核关键爆炸核合成。质子和α诱导反应的异国情调的核占主导地位的重-爆炸环境中的元素核合成，如新星，超新星和X射线爆发。 NSL TriSol设施中的新SABRE阵列将使科学家能够测量小至10 e −5的质子和α分支比。该光谱仪的主要特点是，它将允许实验人员选择特定的反应产物，以确定在基本上没有背景的光谱中产生的原子核的各个状态。这种能力将使该小组能够测量如此低的分支比，并对理解恒星温度下的捕获反应产生重大影响。一个最好的例子是15 O（α，γ）19 Ne反应，因为它在通过快速质子捕获过程触发重元素核合成中具有关键重要性。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Experiments probing clustering effects in explosive nucleosynthesis

探索爆炸性核合成中聚类效应的实验

DOI：
10.3389/fphy.2023.1123868
发表时间：
2023
期刊：
Frontiers in Physics
影响因子：
3.1
作者：
Bardayan, D. W.
通讯作者：
Bardayan, D. W.

Nuclear physics with TriSol at Notre Dame’s Nuclear Science Laboratory

圣母大学核科学实验室的 TriSol 核物理

DOI：
10.1016/j.nimb.2023.05.006
发表时间：
2023
期刊：
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
影响因子：
0
作者：
Ahn, T.;Bardayan, D.W.;Blankstein, D.;Boomershine, C.;Brodeur, M.;Carmichael, S.;Coil, S.;Kolata, J.J.;O’Malley, P.D.;Porter, W.
通讯作者：
Porter, W.

TriSol: A major upgrade of the TwinSol RNB facility

TriSol：TwinSol RNB 设施的重大升级