US-France Cooperative Research: Systematic Measurements of Hyperfine Structure Anomolies

该奖项将支持博士之间的合作研究。纽约大学的h.h. Stroke和O. Redi以及法国奥赛Aime Cotton实验室的Liberman博士和同事。本研究的目的是研究中子数变化对核结构的系统效应。将原子核磁化与均匀磁场的相互作用与原子电子产生的非均匀磁场的相互作用（玻尔-魏斯科普夫效应或超精细结构异常）进行比较，可以看出原子核的扩展磁性结构。该效应可用于研究核磁性质和波函数。在实践中，几乎完全缺乏系统的实验数据限制了这种可能性。通过将测量扩展到欧洲核子研究中心同位素分离器在线检测（ISOLDE）上可获得的长链放射性同位素，这两个研究小组将开展研究，预计将获得与已经获得的同位素变化的核电荷分布系统数据相当的磁性结构数据。纽约大学的原子束磁共振机正被改编为该小组在法国建造的最终设备的原型，法国所需的大部分激光系统也在开发中。这项研究的结果将导致有价值的新的和系统的数据对原子核的电和磁的性质。

This award will support collaborative research between Drs. H. H. Stroke and O. Redi, New York University and Dr. Liberman and colleagues at the Laboratoire Aime Cotton, Orsay, France. The objective of this research is to study the systematic effects in nuclear structure as the neutron number is varied. The extended magenetic structure of the nucleus is manifested when one compares the interaction of the nuclear magnetization with a uniform magnetic field to that in the inhomogeneous field, produced by the atomic electrons (Bohr-Weisskopf effect or hyperfine structure anomaly). The effect can be used to explore nuclear magnetic properties and wave functions. In practice, the nearly total lack of systematic experimental data has limited this possibility. By extending the measurements to long chains of radioactive isotopes obtainable at the CERN isotope separator with on-line-detection (ISOLDE), the two research groups will carry out studies that are expected to lead to magenetic structure data comparable to that already obtained for the systematics of the nuclear charge distribution from isotope shifts. An atomic beam magnetic resonance machine at N.Y.U. is being adapted as a prototype for the final apparatus to be built by the group in France, where much of the required laser systems are also under development. The results of this research should lead to valuable new and systematic data on electric and magenetic properties of nuclei.