Studies of Nuclear Reactions and Stucture

核反应和结构研究

• 批准号: 1712953
• 负责人: Ingo Wiedenhoever
• 金额: $ 453.6万
• 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: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1712953&HistoricalAwards=false
• 关键词: Studies; Nuclear; Reactions; Stucture

This award supports the experimental nuclear physics group at Florida State University and the operation of the John D. Fox Superconducting Accelerator Laboratory, as well as other work at national user laboratories. The experiments include studies of nuclear reactions and decays that play key roles in all stages of stellar processes. Other experiments focus on understanding where the chemical elements come from and how they evolved and ordered themselves into nuclear shell structures. The group will also exploit heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) to investigate how visible matter came into being and how it evolved from a quark-gluon plasma. Much of this program is aligned to address fundamental questions outlined in the 2015 Long Range Plan for Nuclear Science. The broader societal impacts of this project lie in the education and training of undergraduate and graduate students in a hands-on environment. Because of the students' training and hands-on work with high tech equipment in a forefront nuclear physics laboratory, FSU graduates are in high demand and now serve in key roles in homeland security, national defense, high-tech industry, leading edge research, and STEM education. The group also is active in supporting and strengthening local school systems. The John D. Fox accelerator laboratory focuses on programs in nuclear structure physics through particle and gamma-ray spectroscopy and nuclear astrophysics with radioactive beams produced in flight by the RESOLUT facility. In addition, the newly installed Super-Enge Split-Pole Spectrograph (SE-SPS) at the FSU accelerator is re-establishing a nationally unique resource for high-resolution spectroscopy of light- and heavy-ion reactions. The group will have a new research focus on the nuclear physics of unbound states and the super-radiance mechanism in light nuclei. Another new initiative is the development of a novel Multi-Sample Ion Chamber (FSU-MUSIC) active-target detector, to be used in the measurement of fusion cross-sections between exotic nuclei and at low energy. The detector will be combined with position-resolving silicon-detectors such that elastic and inelastic scattering, transfer-reactions and fusion can be measured simultaneously, in an effort to unravel the various contributions to the fusion mechanism at low energies. Finally, the ANASEN active-target detector is a leading detector system for reactions of astrophysical interest at FSU and also in two recent experiments at the re-accelerated beam facility REA-3 of the NSCL. This is an example of how the development of a new detector technology and methods at the local laboratory creates scientific opportunity at national facilities and is a model for the future role of the laboratory in the era of FRIB.

该奖项支持佛罗里达州立大学的实验性核物理小组以及约翰·D·福克斯（John D. Fox）超导加速器实验室的运作以及国家用户实验室的其他工作。 实验包括对核反应的研究和在恒星过程的各个阶段中起关键作用的衰减的研究。 其他实验的重点是了解化学元素的来源以及它们如何进化并命令自己进入核壳结构。 该小组还将利用相对论重离子对撞机（RHIC）的重离子碰撞，以调查可见物质的产物以及它是如何从夸克 - 胶状等离子体演变而来的。 该计划的大部分是一致的，以解决2015年核科学远程计划中概述的基本问题。 该项目的更广泛的社会影响在于在动手环境中对本科生和研究生的教育和培训。由于学生与高科技设备在最前沿的核物理实验室的培训和动手合作，FSU毕业生的需求很高，现在在国土安全，国防，高科技行业，领先的边缘研究和STEM教育中发挥关键作用。 该小组还积极支持和加强当地学校系统。 约翰·福克斯（John D. Fox）加速器实验室通过粒子和γ射线光谱和核天体物理学的核结构物理学方案，并通过溶质设施在飞行中产生的放射性光束。此外，FSU加速器的新安装的超级分裂光谱仪（SE-SP）正在重新建立一种全国独特的资源，用于对光和重离子反应的高分辨率光谱。 该小组将重点介绍未结合状态的核物理和光核中的超级降低机制。另一个新的计划是开发新型的多样本离子室（FSU-Music）主动目标检测器，可用于测量外来核和低能量下的外来核之间的融合横截面。检测器将与位置分辨率的硅检测器结合使用，以便可以同时测量弹性和非弹性散射，转移反应和融合，以揭示低能量下对融合机制的各种贡献。最后，Anasen活动目标检测器是FSU中天体物理兴趣反应的领先探测器系统，在NSCL的重新加速光束设施REA-3的最新实验中，也是NSCL的重新加速光束设施。这是当地实验室新探测器技术和方法开发如何在国家设施中创造科学机会的一个例子，并且是实验室在FRIB时代的未来作用的模型。

项目成果

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.

β decay of Si38,40 ( Tz=+5,+6 ) to low-lying core excited states in odd-odd P38,40 isotopes

Si38,40 ( Tz= 5, 6 ) β 衰变到奇奇 P38,40 同位素中的低位核心激发态

• DOI: 10.1103/physrevc.95.024308
• 发表时间: 2017
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Tripathi, Vandana;Lubna, R. S.;Abromeit, B.;Crawford, H. L.;Liddick, S. N.;Utsuno, Y.;Bender, P. C.;Crider, B. P.;Dungan, R.;Fallon, P.
• 通讯作者: Fallon, P.

Measurement of F17 ( d,n ) Ne18 and the impact on the F17 ( p,γ ) Ne18 reaction rate for astrophysics

F17 ( d,n ) Ne18 的测量及其对天体物理学中 F17 ( p,γ ) Ne18 反应速率的影响

• DOI: 10.1103/physrevc.96.045812
• 发表时间: 2017
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Kuvin, S. A.;Belarge, J.;Baby, L. T.;Baker, J.;Wiedenhöver, I.;Höflich, P.;Volya, A.;Blackmon, J. C.;Deibel, C. M.;Gardiner, H. E.
• 通讯作者: Gardiner, H. E.

β− decay of Tz=+112 isotopes Al37 and Si39 : Understanding Gamow-Teller strength distribution in neutron-rich nuclei

Tz= 112 同位素 Al37 和 Si39 的 β 衰变：了解富中子核中的伽莫夫-泰勒强度分布

• DOI: 10.1103/physrevc.100.014323
• 发表时间: 2019
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Abromeit, B.;Tripathi, Vandana;Crawford, H. L.;Liddick, S. N.;Yoshida, S.;Utsuno, Y.;Bender, P. C.;Crider, B. P.;Dungan, R.;Fallon, P.
• 通讯作者: Fallon, P.

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

快速旋转核中高旋转频率下配对相关性的后弯、资历和泡利阻塞

• DOI: 10.1103/physrevc.100.014302
• 发表时间: 2019
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Miller, S. L.;Villafana, K. A.;Riley, M. A.;Simpson, J.;Hartley, D. J.;Paul, E. S.;Ayangeakaa, A. D.;Baron, J. S.;Bertone, P. F.;Boston, A. J.
• 通讯作者: Boston, A. J.