WoU-MMA: Studies of Nuclear Structure and Nuclear Astrophysics

WoU-MMA：核结构和核天体物理学研究

• 批准号: 2012522
• 负责人: Ingo Wiedenhoever
• 金额: $ 570万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012522&HistoricalAwards=false
• 关键词: WoU; MMA; Studies; Nuclear; Structure

The nuclear physics group at Florida State University (FSU) will use their experimental facilities to address long-standing questions about the nuclear reactions that take place in stars and in stellar explosions. These reactions are responsible for producing most of the naturally occurring elements in the universe. A second goal is to measure and understand the behavior of exotic nuclei – isotopes that have too many neutrons or too few neutrons to be stable. FSU researchers perform their experiments on-campus at the John D. Fox Superconducting Accelerator Laboratory and at national facilities such as the Facility for Rare Ion Beams (FRIB) at Michigan State University, ATLAS at Argonne National Laboratory, and at international facilities such as TRIUMF in Canada. The research will be performed in close collaboration with theoretical physicists at both FSU and around the world. The FSU nuclear physics program supported by this grant is one of the nation’s leading educators of nuclear scientists at both the undergraduate and Ph. D. levels. At the undergraduate level, the Fox Laboratory will be working closely with three four-year institutions in Florida to provide research opportunities for the faculty at these smaller institutions and the combined effort will give a head start on nuclear science careers for undergraduates from these institutions. The Fox laboratory’s Ph.D. graduates work in academics, at national laboratories and in industry. Florida State University has trained many students who now play key roles in nuclear science, homeland security, national defense, health care, high-tech industry, and education. The FSU researchers supported by this grant pursue two primary scientific goals. The first goal is to reproduce in the laboratory the nuclear reactions that take place in stellar explosions. By using these laboratory experiments to determine the rates at which reactions occur in exploding stars, FSU researchers hope to understand the abundances of elements in the universe and contribute to a deeper understanding of the star explosions as well. The second goal is to measure the behavior of exotic nuclei – that is, isotopes in which the ratio of neutrons to protons is unusually large or unusually small and therefore are not stable and do not occur naturally on earth. These exotic nuclei are more weakly bound than stable isotopes, and so their measured properties provide tight constraints on the mechanisms that bind nuclei together and guide advances in theoretical nuclear physics. These experiments require a combination of techniques including the use of the following facilities which are available at FSU: an active-target detector for radioactive-beam experiments; a new SE-SPS spectrograph facility; and a new Clarion-2 gamma-ray detector array.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.

佛罗里达州立大学（FSU）的核物理小组将使用其实验设施来解决有关恒星和恒星爆炸中发生的核反应的长期问题。这些反应负责产生宇宙中大多数自然发生的元素。第二个目标是测量和理解外来核的行为 - 中子太多或中子太少而无法稳定的同位素。 FSU研究人员在约翰·D·福克斯（John D.该研究将与FSU和世界各地的理论物理学家密切合作进行。该赠款支持的FSU核物理学计划是本科和博士学位的核科学家的主要教育者之一。在本科生，福克斯实验室将与佛罗里达州的三个四年制机构紧密合作，为这些较小的机构的教职员工提供研究机会，而综合努力将为这些机构的本科生提供核科学职业生涯。福克斯实验室博士毕业生在学者，国家实验室和工业中工作。佛罗里达州立大学培训了许多现在在核科学，国土安全，国防，医疗保健，高科技行业和教育中扮演关键角色的学生。这笔赠款购买的FSU研究人员购买了两个主要的科学目标。第一个目标是在实验室中复制出恒星爆炸发生的核反应。通过使用这些实验室实验来确定爆炸恒星中发生反应的速率，FSU研究人员希望了解宇宙中元素的丰富性，并有助于更深入地了解恒星爆炸。第二个目标是测量异国核的行为 - 即，中子与质子比异常大或异常小的同位素，因此不稳定，因此不稳定，并且不自然发生在地球上。这些外来的核比稳定的同位素更弱，因此它们所测量的特性对将核结合并指导理论核物理学的进步的机制产生了严格的约束。这些实验需要组合技术的组合，包括使用以下设施，该设施可在FSU上使用：用于放射性梁实验的活动目标检测器；新的SE-SPSPSPS仪设施；以及新的Clarion-2伽马射线检测器阵列。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，通过评估诚实地表示支持。

项目成果

In-beam γ -ray spectroscopy of P37–42

P37–42 的束内 γ 射线光谱

• DOI: 10.1103/physrevc.104.014305
• 发表时间: 2021
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Hill, A. M.;Gade, A.;Bazin, D.;Brown, B. A.;Elman, B.;Farris, P.;Li, J.;Longfellow, B.;Pereira, J.;Revel, A.
• 通讯作者: Revel, A.

Hexadecapole strength in the rare isotopes 74,76Kr

• DOI: 10.1016/j.physletb.2023.137932
• 发表时间: 2023-04
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: M. Spieker;S. Agbemava;Dominique Bazin;S. Cottle;P. Farris;A. Gade;T. Ginter;S. Giraud;K. Kemper;J. Li;W. Nazarewicz;S. Noji;J. Pereira;L. Riley;M. Smith;D. Weisshaar;R. Zegers

Onset of band structure in Ga70

Ga70 中能带结构的开始

• DOI: 10.1103/physrevc.105.054307
• 发表时间: 2022
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Haring-Kaye, R. A.;Palombi, F.;Döring, J.;Tabor, S. L.;Abromeit, B.;Lubna, R.;Tai, P.-L.;Tripathi, Vandana;Volya, A.;VonMoss, J. M.
• 通讯作者: VonMoss, J. M.

Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB

穿过 N=28 朝向中子滴线：首次测量 FRIB 半衰期

• DOI: 10.1103/physrevlett.129.212501
• 发表时间: 2022
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Crawford, H. L.;Tripathi, V.;Allmond, J. M.;Crider, B. P.;Grzywacz, R.;Liddick, S. N.;Andalib, A.;Argo, E.;Benetti, C.;Bhattacharya, S.
• 通讯作者: Bhattacharya, S.

Evolution of the N=20 and 28 shell gaps and two-particle-two-hole states in the FSU interaction

FSU 相互作用中 N=20 和 28 壳间隙和两粒子两孔态的演化

• DOI: 10.1103/physrevresearch.2.043342
• 发表时间: 2020
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: Lubna, R. S.;Kravvaris, K.;Tabor, S. L.;Tripathi, Vandana;Rubino, E.;Volya, A.
• 通讯作者: Volya, A.