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High Temperature Corrections For The Classical Expressions Of Radiative Losses From A Black-Body
Istanbul Technical University, Nuclear Energy Institute.ORCID-id: 0000-0002-7431-5115
1999 (engelsk)Inngår i: Canadian journal of physics (Print), ISSN 0008-4204, E-ISSN 1208-6045, Vol. 77, nr 5, s. 343-351Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The contribution from thermally generated electron–positron pairs to the radiativelosses from a black body is considered near the temperature corresponding to the electron’srest mass energy Tc= mec2/k. The correction factors are defined as the ratio of correctedexpressions (which also include the contribution from thermal pairs) to the classical expressions(which include merely photons). The correction factors for energy, free energy, and entropyfluxes have different values about 0.5Tc, while they have the same value at T << Tc and T >> Tc. The Stephan–Boltzmann’s constant becomes temperature dependent due to thecontribution of thermal pairs. According to the classical expressions of radiative losses, the ratioof energy flux to the absolute value of free energy flux is a constant and it is equal to 3. On thecontrary, it is shown that it is a function of temperature about Tc and it has a maximum about0.38Tc. The correction factor for mean energy per emitted thermal particle has also a maximumabout T = 0.42Tc.

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1999. Vol. 77, nr 5, s. 343-351
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URN: urn:nbn:se:uu:diva-380325OAI: oai:DiVA.org:uu-380325DiVA, id: diva2:1299250
Tilgjengelig fra: 2019-03-26 Laget: 2019-03-26 Sist oppdatert: 2019-03-26

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