U.S.-Denmark Cooperative Research: High Spin States in Light Platinum Nuclei

该奖项将使诺克斯维尔田纳西大学的Leo L. Riedinger博士和他的一名博士后与丹麦哥本哈根尼尔斯玻尔研究所的Jerry D. Garrett博士合作。他们将研究缺中子铂核中的高自旋核态。尼尔斯玻尔研究所的重离子加速器将用于测量。硫弹丸将引发反应，新的20个康普顿抑制锗计数器阵列（NORDBALL）将用于探测来自高自旋态的弱伽马射线。本实验的目的是通过离子束光谱来了解高j准粒子排列对铂轻同位素软核形状的影响。一个新的助推器正在被添加到丹麦的加速器中，并将提供适当能量的粒子。诺克斯维尔和哥本哈根的研究小组都在积极研究重离子诱导相互作用中产生的原子核的高自旋角动量特性。尼尔斯玻尔研究所的科学家们在研究原子核的高自旋特性方面处于世界领先地位。该奖项将使美国和丹麦的研究人员能够继续他们的合作，并更多地了解核的形状作为准粒子激发和旋转频率的函数。

This award will enable Dr. Leo L. Riedinger, University of Tennessee, Knoxville, and one of his postdoctoral fellows to collaborate with Dr. Jerry D. Garrett, of the Niels Bohr Institute, Copenhagen, Denmark. They will study high-spin nuclear states in neutron-deficient platinum nuclei. The heavy ion accelerator at the Niels Bohr Institute will be used for the measurements. Sulfur projectiles will initiate the reactions, and the new array of 20 Compton-suppressed Ge counters (the NORDBALL) will be used to detect the weak gamma rays from the high-spin states. The purpose of the proposed experiments is through ion-beam spectroscopy to learn about the effect of high-j quasiparticle alignment on the soft nuclear shapes in certain light isotopes of platinum. A new booster is being added to the accelerator in Denmark and will provide particles of appropriate energies. The Knoxville and Copenhagen research groups are each active in investigating high-spin angular momentum properties of nuclei produced in heavy-ion induced interactions. Scientists at the Niels Bohr Institute are among the world's leaders in research on high-spin properties of nuclei. This award will allow the U.S. and Danish researchers to continue their collaboration and to learn more about the shape of nuclei as a function of quasiparticle excitation and rotational frequency.