Residual Gas in Closed Systems. III: Development and Reduction of Gases Generated by Source Materials

The amounts and composition of residual gases formed in sealed ampoules loaded with different sources (elements and II-VI and IV-VI compounds) after consecutive annealings were investigated. A given source was subjected to a series of heat treatments, with intermediate measurements and removal of the gas accumulated in the system. The results of these experiments are discussed in terms of the underlying thermochemical and kinetic phenomena and practical limitations of reducing the amount of residual gases in sealed ampoules.