The correction to the polarizability of helium due to blackbody radiation is calculated near room temperature. A precise theoretical determination of the blackbody radiation correction to the polarizability of helium is essential for dielectric gas thermometry and for the determination of the Boltzmann constant. We find that the correction, for not too high temperature, is roughly proportional to a modified hyperpolarizability (two-color hyperpolarizability), which is different from the ordinary hyperpolarizability of helium. Our explicit calculations provide a definite numerical result for the effect and indicate that the effect of blackbody radiation can be excluded as a limiting factor for dielectric gas thermometry using helium or argon.
M. Puchalski et al., "Blackbody-Radiation Correction to the Polarizability of Helium," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 83, no. 4, pp. 042508-1-042508-7, American Physical Society (APS), Apr 2011.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.83.042508
Keywords and Phrases
Black Body Radiation; Boltzmann Constants; Dielectric Gas; High Temperature; Hyper-polarizability; Limiting Factors; Near Room Temperature; Numerical Results; Polarizabilities; Two-color; Antenna Radiation; Argon; Dielectric Properties Of Gases; Optics; Polarization; Temperature Measurement; Thermometers; Helium
International Standard Serial Number (ISSN)
Article - Journal
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