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Chemical equilibria relating the isotopic hydrogens at low temperatures

Technical Report ·
DOI:https://doi.org/10.2172/7224681· OSTI ID:7224681
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Hydrogen fusion will require a fuel mixture of liquefied or frozen D/sub 2/ and T/sub 2/. The composition of this fuel mixture is described by the equilibrium constant K/sub DT/. The theory of isotopic exchange reactions is discussed as applied to the hydrogen isotopes. A literature survey of the values of K/sub HD/, K/sub HT/, and K/sub DT/ found no values of K/sub DT/ for temperatures below 25/sup 0/K and no values of K/sub HD/ and K/sub HT/ for temperatures below 50/sup 0/K. The existing data are critically evaluated, and simplified formulas for the three equilibrium constants in the temperature range 50 to 300/sup 0/K are derived from them. Harmonic approximation theory with rotational correction was used to calculate values of K/sub HD/, K/sub HT/, and K/sub DT/ in the temperature range 4.2 to 50/sup 0/K. It is found that K/sub DT/ = 2.995 exp(-10.82/T) in the temperature range 16.7 to 33.3/sup 0/K to an accuracy of 1%. Tables, graphs, and equations of K/sub HD/, K/sub HT/, and K/sub DT/ are given for the temperature range 4.2 to 50/sup 0/K. 27 references, 14 tables, 8 figures.
Research Organization:
California Univ., Livermore (USA). Lawrence Livermore Lab.
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
7224681
Report Number(s):
UCRL-52104
Country of Publication:
United States
Language:
English

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Related Subjects

060100 -- Fusion Fuels-- Sources-- (-1987)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400203* -- Isotope Exchange & Isotope Separation-- (-1987)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL REACTION KINETICS
DEUTERIUM
DOCUMENT TYPES
EQUATIONS
EQUILIBRIUM
HYDROGEN ISOTOPES
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
REACTION KINETICS
REVIEWS
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRITIUM
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YEARS LIVING RADIOISOTOPES