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Black-Body Radiation Correction in the Polarizability of Helium



Peter J. Mohr, M. Puchalski, Ulrich D. Jentschura


The correction to the polarizability of helium due to black-body radiation is calculated near room temperature. A precise theoretical determination of the black-body 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 black-body radiation can be excluded as a limiting factor for current dielectric gas thermometry, although it might become relevant in the future.
Physical Review A


black-body radiation, hyperpolarizability, polarizability, dielectric gas thermometry


Mohr, P. , Puchalski, M. and Jentschura, U. (2011), Black-Body Radiation Correction in the Polarizability of Helium, Physical Review A (Accessed April 15, 2024)
Created March 1, 2011, Updated February 19, 2017