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Direct Nuclear Reactions: Theory and Uncertainties

直接核反应：理论和不确定性

基本信息

批准号：
1811815
负责人：
Filomena Maciel Nunes
金额：
$ 30万
依托单位：
Michigan State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-15 至 2022-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1811815&HistoricalAwards=false
关键词：
Direct Nuclear Reactions Theory Uncertainties

项目摘要

Direct nuclear reactions provide some of the most versatile probes in nuclear physics and provide access to a large variety of nuclear properties, most of which are relevant for astrophysics and societal applications. Reliable reaction theory with known uncertainties is key for the interpretation of nuclear reaction experiments. This project aims to advance our understanding of the information contained in a number of different reaction data. By quantifying uncertainties and evaluating the level of confidence of the reaction theory used to interpret a given experiment, this project will enable a better use of current and future rare isotope facilities in the U.S. and worldwide. Specifically, the PI and her student will work with experimentalists in planning and interpreting on-going nuclear reaction experiments at the National Superconducting Cyclotron Laboratory and at the future Facility for Rare Isotope Beams at Michigan State University.This project seeks to advance our understanding of the information content and uncertainties concerning direct nuclear reactions, quantifying uncertainties and evaluating the level of confidence of the quantities extracted from the interpretation of experiments. Tools will be developed to use Bayesian statistics to extract constraints on the optical potential from data, as well as defining confidence bands for reaction observables. Strategies for reducing the uncertainty of the theory will also be explored. The Bayesian tools will be applied to extracting a non-local global optical potential for a wide range of masses and energies, informed by ab-initio many-body theories. The Bayes factor will be used to perform model comparisons and establish the level of sophistication needed in a reaction model to describe available data. The PI and her student will focus on advancing the theory for direct reactions with a particular focus on uncertainty quantification. A second goal of this project is to pave the way for a direct connection between many-body and few-body approaches and enable a better understanding of the role of excitation in direct reaction processes.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.

直接核反应提供了核物理学中一些最通用的探测器，并提供了各种各样的核特性，其中大多数与天体物理学和社会应用有关。具有已知不确定性的可靠反应理论是解释核反应实验的关键。该项目旨在促进我们对许多不同反应数据中包含的信息的理解。通过量化不确定性并评估用于解释给定实验的反应理论的置信度，该项目将能够更好地利用美国和世界各地当前和未来的稀有同位素设施。具体而言，PI和她的学生将与实验人员一起计划和解释正在进行的核反应实验，这些实验在国家超导回旋加速器实验室和密歇根州立大学未来的稀有同位素束设施进行。该项目旨在促进我们对直接核反应的信息内容和不确定性的理解，量化不确定性和评估从实验解释中提取的数量的置信水平。将开发工具，利用贝叶斯统计从数据中提取对光学势的限制，并确定反应可观测量的置信带。还将探讨减少理论不确定性的策略。贝叶斯工具将被应用于提取一个非本地的全球光学潜力的质量和能量范围广泛，告知从头多体理论。贝叶斯因子将用于进行模型比较，并确定反应模型描述可用数据所需的复杂程度。PI和她的学生将专注于推进直接反应理论，特别关注不确定性量化。该项目的第二个目标是为多体和少体方法之间的直接联系铺平道路，并使人们能够更好地理解激发在直接反应过程中的作用。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

项目成果

期刊论文数量（16）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Informing direct neutron capture on tin isotopes near the N=82 shell closure

DOI：
10.1103/physrevc.99.041302
发表时间：
2019-04
期刊：
Physical Review C
影响因子：
3.1
作者：
B. Manning;G. Arbanas;J. Cizewski;R. Kozub;S. Ahn;J. Allmond;D. Bardayan;K. Chae;K. Chipps;M. Howard;K. Jones;J. Liang;M. Matoš;C. Nesaraja;F. Nunes;P. O’Malley;S. Pain;W. Peters;S. T. Pittman;A. Ratkiewicz;K. Schmitt;D. Shapira;M. Smith;L. Titus
通讯作者：
B. Manning;G. Arbanas;J. Cizewski;R. Kozub;S. Ahn;J. Allmond;D. Bardayan;K. Chae;K. Chipps;M. Howard;K. Jones;J. Liang;M. Matoš;C. Nesaraja;F. Nunes;P. O’Malley;S. Pain;W. Peters;S. T. Pittman;A. Ratkiewicz;K. Schmitt;D. Shapira;M. Smith;L. Titus

Experimental study of the nature of the 1− and 2− excited states in Be10 using the Be11(p,d) reaction in inverse kinematics

DOI：
10.1103/physrevc.104.044601
发表时间：
2021-10
期刊：
Physical Review C
影响因子：
3.1
作者：
K. Kuhn;F. Sarazin;F. Nunes;M. Alvarez;C. Andreoiu;D. Bardayan;P. Bender;J. Blackmon;M. Borge;R. Braid;B. A. Brown;W. Catford;C. Diget;A. Dipietro;T. Drake;P. Figuera;A. Garnsworthy;J. Gómez-Camacho;G. Hackman;U. Hager;S. Ilyushkin;E. Nácher;P. O’Malley;A. Perea;V. Pesudo;S. T. Pittman;D. Smalley;C. Svensson;O. Tengblad;P. Thompson;C. Unsworth;Z. Wang
通讯作者：
K. Kuhn;F. Sarazin;F. Nunes;M. Alvarez;C. Andreoiu;D. Bardayan;P. Bender;J. Blackmon;M. Borge;R. Braid;B. A. Brown;W. Catford;C. Diget;A. Dipietro;T. Drake;P. Figuera;A. Garnsworthy;J. Gómez-Camacho;G. Hackman;U. Hager;S. Ilyushkin;E. Nácher;P. O’Malley;A. Perea;V. Pesudo;S. T. Pittman;D. Smalley;C. Svensson;O. Tengblad;P. Thompson;C. Unsworth;Z. Wang

Toward emulating nuclear reactions using eigenvector continuation

使用特征向量延拓模拟核反应