Operation of the Nuclear Structure Laboratory (Physics)

该奖项将支持纽约州立大学石溪分校核结构实验室的一项重离子核物理研究计划，该计划将超导助推加速器与FN串列加速器结合使用。再加上石溪小组开发的实验设备和测量技术，这种能力使一系列异常复杂和多样化的实验成为可能。继续开发研究设备，包括超导加速器技术，将与核科学计划并行进行。我们将通过对衰变伽马辐射的观测来研究高激发能下原子核的集体激发，特别是巨共振。这些研究表明，探测器形状随核温度的变化而变化。具有非常高角动量的原子核的性质将使用康普顿抑制的高分辨率Ge探测器阵列来测量。这项工作探索了形状和微观核结构作为角动量的函数的变化。激光光谱学将被用来研究远离稳定性的原子核。激光光谱学通过超精细结构测量提供有关核大小和形状的信息。将通过使用新的布拉格曲线光谱仪的测量来研究重核亚势垒聚变截面中的反常增强。为了研究核-核反应动力学，将进行粒子-粒子关联的测量和分析。为此已经组装了一种特殊的探测器阵列。这项研究将由5名教职员工、15名研究生和5名博士后研究员进行。

This award will support a program of research in heavy ion nuclear physics at the Nuclear Structure Laboratory, State University of New York at Stony Brook, using a superconducting booster accelerator in conjunction with a model FN tandem accelerator. Together with the experimental equipment and measurement techniques developed by the Stony Brook group, this capability makes possible an unusually sophisticated and diverse range of experiments. Continued development of research equipment, including superconducting accelerator technology, will be carried out in parallel with the nuclear science program. Collective excitations of nuclei at high excitation energies, and giant resonances, in particular, will be studied with observation of the decay gamma radiation. These studies probe shape changes as a function of nuclear temperature. The properties of nuclei having very high angular momenta will be measured using an array of Compton suppressed, high resolution Ge detectors. This work probes changes in shape and microscopic nuclear structure as a function of angular momentum. Laser spectroscopy will be used to study nuclei far from stability. Laser spectroscopy provides information on nuclear sizes and shapes via hyperfine structure measurements. Anomalous enhancements in the cross section for subbarrier fusion of heavy nuclei will be studied through measurements using a new Bragg curve spectrometer. Measurements of particle-particle correlations will be made and analyzed to study nucleus-nucleus reaction dynamics. A special detector array has been assembled for this purpose. The research will be carried out by five faculty members, fifteen graduate students and five post-doctoral fellows.