The measurement of the total emissivity of a solid surface in the black cavity which is immersed in liquid nitrogen and under highvacuum (10-6 torr) by steady caloric method is described.
Under ultra highvacuum condition, the adsorption of oxygen and ethylene on electrolytic silver containing barium was studied by mass spectroscopy and work function change measurement.
在超高真空条件下用热脱附和功函数变化等方法研究了氧在银-钡催化剂上的吸附和反应。
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The factors limiting the measurement and achievement of extremely highvacuum due to the existence of a hot cathode was overcome by the successful use of the field-emission cold cathode...