Probing Nuclear Sturcture with Fast Neutrons

肯塔基大学核结构组的研究主要集中在核光谱学、中子诱导反应和中子散射等相关课题上。该大学加速器实验室的中子散射实验旨在a)探索球形和变形核中的多声子振动，b)检查快速电磁跃迁在集体激发衰变中的作用，c)提供数据，导致更现实的核水平密度模型，d)解决中子和质子在核激发中的单独作用。e)扩展我们对核壳结构和核形状跃迁本质的理解。最近发展起来的用多普勒频移衰减法测量短寿命的技术，以及在非弹性中子散射后执行伽马-伽马一致性的技术，在许多这些研究中都是至关重要的。利用洛斯阿拉莫斯中子散射中心（LANSCE）研制的伽玛射线探测器GEANIE阵列与散裂中子源耦合提供的特殊机会，开辟了一个新的研究方向。利用这个装置产生的高能中子，将探索不易由带电粒子反应产生的原子核。

The research of the nuclear structure group at the University of Kentucky is focused on related topics in nuclear spectroscopy, neutron-induced reactions, and neutron scattering. Neutron scattering experiments at the University's accelerator laboratory are designed to a) explore multiphonon vibrations in spherical and deformed nuclei, b) examine the role of fast electromagnetic transitions in the decay of collective excitations, c) provide data leading to more realistic models of nuclear level densities, d) address the separate roles of neutrons and protons in nuclear excitations, and e) expand our understanding of nuclear shell structure and the nature of nuclear shape transitions. Recently developed techniques to measure short lifetimes with the Doppler-shift attenuation method and to perform gamma-gamma coincidences following inelastic neutron scattering are crucial in many of these studies. A new research direction has been initiated to take advantage of the special opportunities provided by the development of the GEANIE array of gamma-ray detectors coupled with the spallation neutron source at the Los Alamos Neutron Scattering Center (LANSCE). With the high-energy neutrons from this facility, nuclei not readily produced by charged-particle reactions will be explored.