Angular Dependence of the Scattering of Metastable Helium Atoms in Helium and Neon

af Hubert Richards

Abstract: Abbreviated introduction: This dissertation concerns the measurement of collision cross sections for the scattering of excited helium atoms in helium and neon as a function of the minimum angular resolution of the beam apparatus. Some of the helium atoms in gaseous helium are excited to both the 21S and 23S metastable states. An atomic beam of the helium atoms is then produced and allowed to enter a collision chamber in which a gas is introduced at low pressure (ca. 10-3 mm). The scatt... (Læs mere)