Experimental Nuclear Science (Physics)

该基金支持以下几个领域的核物理研究：1)利用独特的超导磁体系统聚焦次级核束，研究由次级不稳定（即放射性）核束引起的具有天体物理学重要性的核反应。这项工作将在圣母大学的串联加速器上完成。2)密歇根州立大学nscl重离子设施中用于放射性束流实验和重离子诱导反应研究的超大实心角超导电磁光谱仪和探测器系统的安装、开发和运行。3)与荷兰研究小组继续合作，在印第安纳大学回旋加速器上使用大型光谱仪研究电荷交换反应，重点是非自旋翻转跃迁和等矢量巨单极子共振。4)用于宇宙年代学的Re/Os β衰变寿命测量和对中微子质量的限制。为此，将进一步开发大体积低背景比例计数器。5)研究重离子诱导反应，包括使用密歇根州立大学超导回旋加速器在正向角度产生高能核子和α粒子。6)改进核质量模型及其在预测核稳定性中的应用。

This grant supports nuclear physics research in several areas: 1) Study of nuclear reactions of astrophysical importance, induced by secondary, unstable (i.e. radioactive) nuclear beams using a unique superconducting magnet system for focusing the secondary beam. This work will be done at the University of Notre Dame tandem accelerator. 2) Installation, development, and operation of a very large solid angle superconducting-solenoid spectrometer and detector system at the Michigan State University -NSCL heavy-ion facility for the study of radioactive-beam experiments and heavy-ion induced reactions. 3) Study of charge-exchange reactions with emphasis on non-spinflip transitions and the isovector giant monopole resonance at the Indiana University Cyclotron using a large spectrometer in continued collaboration with a Dutch research group. 4) Re/Os beta-decay lifetime measurement for use in cosmochronology and to set a limit on the neutrino mass. A large volume low background proportional counter will be further developed for this purpose. 5) Study of heavy-ion induced reactions, including the production of high-energy nucleons and alpha particles at forward angles using the Michigan State University Superconducting Cyclotron. 6) Refinement of nuclear mass models and their application in predicting nuclear stability.