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The goal of this work was to develop and demonstrate the suitability of electron optical techniques for recording the spatial distribution of gas molecules at fixed times with sufficient accuracy that the velocity distribution could be derived. The work concentrated on the properties of chopped molecular beam pulse correspond to a pressure of less than 10 to the minus 7th power Torr. The project was successful. During the course of this program, equipment was built, methods of operation were developed, the theory of the electron optical schlieren was developed in some detail, and ways of efficiently converting the data obtained into velocity distributions of the gas molecule were investigated.
Advances in Electronics and Electron Physics
Electron Probe Microanalysis presents a collection of reviews on various aspects of electron probe microanalysis. This book discusses the model for quantitative electron probe analysis. Organized into 14 chapters, this book begins with an overview of the various kinds of microanalysis followed by a discussion of the advantages that can be derived from using the electron probe method. This text then examines the various applications of backscattered electron and specimen current methods for quantitative analysis. Other chapters consider the fundamental concepts for quantitative electron probe microanalysis utilizing pure elements as standards. This book discusses as well the absolute method of quantitative chemical analysis by emission X-ray spectroscopy. The final chapter deals with the main advantage of the Kossel technique in the study of the thermodynamic and mechanical characteristics of crystals. This book is a valuable resource for scientists and research workers. Non-specialists who need information on this excellent analytical tool will also find this book useful.