By evaporating titanium in an argon atmosphere a deposit consisting of a very fine powder (particle size about 100 Å) is obtained on the inner wall of a metal cylinder. After this powdered titanium has been made to absorb whatever hydrogen isotope is being used, the gas pressure is adjusted by heating the metal cylinder to a certain temperature. Compared with more familiar systems, this pressure regulator has the advantage that equilibrium pressure establishes itself very quickly. One application of the regulator is in sealed-off neutron tubes.
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O. Reifenschweiler (1964) studied this question.
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