PRMI Temperature Scale in the Range from 4,2 K to 20 K

Abstract

In 1964 the authors published preliminary results of their work on establishing the practical temperature scale in the temperature range from 4.2 K to 20 K. The temperature scale for this range was defined using a germanium resistance thermometer, as its sensitivity and reproducibility of readings are as good as it is required for the most accurate determinations of temperature. At the same time germanium thermometers have noticeable defects among which the main one is non-reproducibility of temperature dependence of its resistance from sample to sample, but no better thermometers for this range are available now.