U.S.-Brazil Cooperative Research in Atomic Collisions

该奖项支持斯坦福大学的沃尔特·迈耶霍夫和巴西里约热内卢天主教大学的E.C.黑山在原子碰撞物理学方面的合作研究。他们将研究离子轰击气态原子靶时电子转移引起的电荷捕获和损失。将在两个实验室测量总电荷和微分电荷的变化截面，以研究从低速到中速的过渡区。斯坦福大学有一个串联加速器，可以提供6到40 MeV的弹丸能量，而天主教大学的Van de Graaff加速器可以产生1到4 MeV的能量。这两个设施目前都在改进中，但它们覆盖的能源范围比单独的任何一个都要大。因此，这两个群体在设施和经验方面都是相辅相成的。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。这一努力将继续最近的一项合作，该合作在16个月内发表了三篇论文。

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.