A method is described for making estimates of the total emissivity of hydrogen in the temperature and pressure ranges where hydrogen atoms predominate under equilibrium conditions. For a typical geometrical depth of 50 cm, and temperatures of the order of 12 500°K and higher, with pressures of the order of 100 atmos and higher, the emissivity approaches unity , while for temperatures of the order of 9500°K and lower, with pressures of the order of 10 atmos and lower, the emissivity approaches zero . The variations of the emissivity between these approximate limits are shown graphically as functions of temperature and pressure with the geometrical depth set at 50 cm. The variation of the emissivity with geometrical depth is also shown graphically at 12 600°K and 20 atmos.
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February 1956
Research Article|
February 01 1956
Emissivity of Hydrogen Atoms at High Temperatures
Henry Aroeste;
Henry Aroeste
Daniel and Florence Guggenheim Jet Propulsion Center, California Institute of Technology, Pasadena, California
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William C. Benton
William C. Benton
Daniel and Florence Guggenheim Jet Propulsion Center, California Institute of Technology, Pasadena, California
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J. Appl. Phys. 27, 117–121 (1956)
Article history
Received:
August 12 1955
Citation
Henry Aroeste, William C. Benton; Emissivity of Hydrogen Atoms at High Temperatures. J. Appl. Phys. 1 February 1956; 27 (2): 117–121. https://doi.org/10.1063/1.1722319
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