Abstract
A brief review of present day getter materials is made with reference to the two principal families, i.e., evaporable and nonevaporable getters. The main physicochemical processes involved in the gettering process are reviewed in order to establish the concept of gettering-selective chemical pumping. Examples of practical getter devices are described in connection with a brief overview of some of the most common applications. However, most emphasis will be placed in describing some of the most advanced and more unusual applications of getters which may not always be in widespread use but which indicate the versatility of gettering in widely differing fields.
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