Probing Nuclear Sturcture with Fast Neutrons

肯塔基大学的核结构群研究集中在核谱学、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，导致更现实的核能级密度模型，d)解决中子和质子在核激发中的单独作用，以及e)扩大我们对核壳结构和核形状跃迁性质的理解。最近开发的用多普勒频移衰减法测量短寿命和在非弹性中子散射后进行伽马-伽马符合的技术在许多此类研究中都是至关重要的。已经开始了一个新的研究方向，以利用洛斯阿拉莫斯中子散射中心与散裂中子源相耦合的吉尼伽马射线探测器阵列所提供的特殊机会。利用来自该装置的高能中子，将探索带电粒子反应不易产生的原子核。

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.