U.S.-Malaysia Cooperative Research on Threshold Region Elastic Photon Atom Scattering

这一建议要求资金允许詹姆斯·E博士。 Bayfield和Richard H.物理系Pratt 和天文学，匹兹堡大学，追求与一个 由Chon Sing Chong博士领导的马来西亚科学家团队， 马来西亚国立大学物理学院，槟城， 马来西亚，为期24个月， 阈值区弹性光子的合作研究 原子散射 合作者将使用理论和 实验来研究当前的模型 描述弹性光子原子散射在中等到高 原子序数介质 将测量横截面， 各种元素和散射角。 这些 实验获得的横截面将进行比较 理论预测。 实验数据的使用 将探讨改进理论模型。 小型 角圆目标几何形状和传输类型 将在测量中使用几何形状。 该项目涉及两组合作研究， 具有互补技能的调查员， 设施 USM的实验组有一个背景， 辐射计量学的研究， 以获得更高的精度和更准确的 总相互作用系数的测量， 光子的微分散射截面， 除了基于应用的研究。 本集团于 匹兹堡在基准测试方面有相当大的参与 理论计算。 他们的兴趣一直在 发展对各种不同的物理理解 在原子水平上可能的光子相互作用过程。 主要的合作者都是德高望重的科学家， 几年来，他们在这个领域进行了合作。 research. 他们的合作非常成功， 已导致联合出版物在参考期刊。 该项目与《科学》的目标有关 发展中国家计划，旨在提高 美国科学家和工程师之间的合作水平 与发展中国家的对应方通过 交流科学信息、思想、技能， 技术，并通过在共同问题上的合作， 效益

This proposal requests funds to permit Dr. James E. Bayfield and Dr. Richard H. Pratt, Department of Physics and Astronomy, University of Pittsburgh, to pursue with a team of Malaysian scientists led by Dr. Chon Sing Chong, School of Physics, Universiti Sains Malaysia (USM), Penang, Malaysia, for a period of 24 months, a program of cooperative research on threshold region elastic photon atom scattering. The collaborators will use theory and experiment to study the extent to which current models describe elastic photon atom scattering in moderate to high atomic number media. Cross sections will be measured for a variety of elements and scattering angles. These experimentally obtained cross sections will be compared with theoretical predictions. The use of experimental data to improve theoretical models will be explored. Both small angle circular target geometry and transmission type geometry will be utilized in the measurements. This project involves cooperative research of two groups of investigators who have complementary skills and facilities. The experimental group at USM has a background of research in radiation metrology with efforts directed towards obtaining higher precision and more accurate measurement of total interaction coefficients and differential scattering cross sections of photons, in addition to applications-based research. The group at Pittsburgh has considerable involvement in benchmark theoretical calculations. Their interest has been in developing a firm physical understanding of the various possible photon interaction processes at the atomic level. The key collaborators are highly respected scientists who, for a number of years, have cooperated in the field of the research. Their cooperation has been highly successful and has resulted in joint publications in refereed journals. This project is relevant to the objectives of the Science in Developing Countries Program which seeks to increase the level of cooperation between U.S. scientists and engineers and their counterparts in developing countries through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit.