Dielectric permittivity of deeply supercooled water according to the measurement data at the frequencies 7.6 GHz and 9.7 GHz.
2020
Dielectric permittivity of supercooled volume water has been measured in the range of temperatures from $-20\,^{\circ}$C to $-60\,^{\circ}$C at the frequencies $7.6$~GHz and $9.7$~GHz. The measurements have been made using microwave resonators and wetted silicate sorbents. From the data obtained, the temperature dependences of the relaxation frequencies were updated for the Debye model with two relaxation frequencies. The updated formulae for dielectric permittivity of cold water may be applied to the frequency range $7\ldots200$~GHz.
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