GaAs Polarized Source Development for High-Resolution Electron-Atom Scattering (Physics)

Ga-As极化电子源在原子碰撞物理、表面物理和高能物理中有着重要的应用。随着温度的降低，晶体的主要特性有了显著的改善，但由于杂质气体的凝结，晶体的寿命缩短了。该小组发现原位停止在室温下是有效的，因此建议探索使用原位停止来延长Ga-As晶体在低温下的寿命。

The Ga-As source of polarized electrons has important applications in atomic collision physics, surface physics and high energy physics. Significant improvements of principal characteristics are found as temperature is lowered, but crystal lifetimes are shortened intolerably due to condensation of impurity gases. It is proposed to explore the use of in situ cesiation, which this group has found to be effective at room temperatures, to extend Ga-As crystal lifetime at low temperatures.