Abstract
The dependences of pressure on the amount of the adsorbed helium are studied in the cell simulating an adsorption pump of dilution refrigerator. The experiments were made at 4.2 and 1.5 K in the range of pumping rates 5.10 −6 – 8.10 −5 mole/s and pressures 5 – 20 Pa. The adsorption isotherms at 4.2 K are measured for some previously not studied synthetic adsorbents in the pressure range 1 – 10 2 Pa. The influence of Pd-doping on the adsorptivity is investigated for different adsorbents.
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