U.S.-Brazil Cooperative Research: Cooperative Studies of Anomalous X-Ray Scattering

该奖项将支持匹兹堡大学的Richard Pratt教授与里约热内卢联邦大学的Solange de Barros教授和Odair Goncalves教授与巴西库里蒂巴巴拉那联邦大学的一个物理小组之间的合作。这项研究的目的是在上述三所大学的互补项目的基础上，对原子的伽马射线和x射线的弹性散射进行实验和理论研究。主要的焦点将是反常散射（光子的弹性散射与能量接近原子吸收边缘）。了解光子散射过程对提高原子物理和固体物理的技术基础和基本认识具有重要意义。该项目将试图找出合适的选择，对理论和实验进行批判性比较。研究人员将研究不同原子势的影响，并利用实验信息来了解原子边缘附近预测的确定性极限。他们的实验工作将检验这些预测的有效性。理论研究将在匹兹堡大学进行。实验工作将在里约热内卢联邦大学和巴拉那联邦大学进行。

This award will support collaboration between Professor Richard Pratt of the University of Pittsburgh and Professors Solange de Barros and Odair Goncalves of the Federal University of Rio de Janeiro, in cooperation with a physics group at the Federal University of Parana in Curitiba, Brazil. The aim of the research is to conduct experimental and theoretical investigations into the elastic scattering of gamma rays and X-rays from atoms, based on complementary programs at the three above universities. The main focus will be on anomalous scattering (elastic scattering of photons with energies near atomic absorption edges). Understanding the photon scattering process is important in improving the technology base and the basic understanding of atomic and solid-state physics. The project will attempt to identify suitable choices for a critical comparison of theory and experiment. The researchers will study the effects of different atomic potentials and use experimental information to understand the limits of certainty in predictions near atomic edges. Their experimental work will test the validity of these predictions. The theoretical research will be conducted at the University of Pittsburgh. The experimental work will be performed at the Federal University of Rio de Janeiro and the Federal University of Parana.