U.S.-Brazil Cooperative Research in Atomic Collisions

美国-巴西原子碰撞合作研究

• 批准号: 8900645
• 负责人: Walter Meyerhof
• 金额: $ 0.82万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1992-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8900645&HistoricalAwards=false
• 关键词: U.S.; Brazil; Cooperative; Research; Atomic

This award supports cooperative research in the physics of atomic collisions between Walter Meyerhof of Stanford University and E.C. Montenegro of the Catholic University in Rio de Janeiro, Brazil. They will study the charge capture and loss by electron transfer during the ionic bombardment of gaseous atomic targets. The total and differential charge changing cross-sections will be measured at both laboratories to investigate the transition region from low to intermediate velocities. Stanford has a Tandem accelerator which can provide projectile energies from 6 to 40 MeV while the Van de Graaff accelerator at the Catholic University yields 1 to 4 MeV. Both facilities are currently being improved but they cover a wider energy range than either alone. Therefore the two groups, both through the facilities and their experience, complement each other. The Brazilians have expertise in atomic theory helpful to Stanford with its expertise in the higher energy, heavy-ion regime. This effort will continue a recent collaboration which has produced three papers in 16 months.

该奖项支持斯坦福大学的 Walter Meyerhof 和巴西里约热内卢天主教大学的 E.C. Montenegro 在原子碰撞物理学方面的合作研究。 他们将研究气态原子目标离子轰击过程中电子转移引起的电荷捕获和损失。 两个实验室将测量总电荷变化截面和微分电荷变化截面，以研究从低速到中速的过渡区域。 斯坦福大学拥有串联加速器，可提供 6 至 40 MeV 的射弹能量，而天主教大学的范德格拉夫加速器则可提供 1 至 4 MeV 的射弹能量。 这两个设施目前都在改进，但它们覆盖的能源范围比其中任何一个都更广泛。 因此，两个团队在设施和经验上是相辅相成的。 巴西人在原子理论方面的专业知识对斯坦福大学在高能、重离子体系方面的专业知识很有帮助。 这项工作将延续最近的合作，该合作已在 16 个月内发表了三篇论文。