Stebbings, R. F.2016-04-222016-04-221971Riola, John Peter. "Construction of a crossed beams apparatus to study chemiionization." (1971) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89817">https://hdl.handle.net/1911/89817</a>.https://hdl.handle.net/1911/89817A high vacuum, crossed beams apparatus has been constructed which will be used to study Penning ionization and associative ionization. The first experiments to be performed will involve collisions between He(ls2s 21,3S) and various atoms and molecules. The absolute total ionization cross sections, the separate ionization cross sections for all final state positive ions, and the energy distribution of the Penning electrons will be measured. Chapters 1 and 2 of this thesis will describe previous theoretical and experimental work in the field, respectively. Chapter 3 will discuss the design and initial use of the Crossed Beams Apparatus.154 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE0850reformatted digitalThesis Phys. 1971 Riola