Construction of a 3He calorimeter and heat capacity measurement of the 1965 calorimetry conference copper standard between 0.4 and 20K.

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概要

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• Construction of an isoperibol-type calorimeter with a <SUP>3</SUP>He cryostat is described. A system of charcoal-adsorption-pump is adopted. A Ge-thermometer used in the heat capacity measurements is calibrated in the temperature range from 0.4 to 1.5 K against the magnetic susceptibility of chromium potassium alum. The precision and the accuracy of the calorimeter is ascertained by the heat capacity measurement of the 1965 Calorimetry Conference Copper Standard (T-8.6) in the temperature range from 0.420 to 19.46 K. The deviation of the experimental points from the "copper reference equation" is within the experimental error of ±2.5% between 0.4 and 0.9 K, ±1.5% between 0.9 and 1.5 K, ±1.2% between 1.5 and 4 K, and ±0.6% between 4 and 20 K. The highest deviation of absolute value of the present heat capacity data of copper is 1.86% smaller than the "selected values (Furukawa <I>et al.</I>)" around 6 K. This difference may be primarily attributable to the NBS-65 temperature scale adopted in the present experiment.

• 公益社団法人 日本化学会の論文

著者

• Seki Syuzo

  Department Of Chemistry Faculity Of Science Osaka University

• Sorai Michio

  Department Of Chemistry Faculty Of Science Osaka University

• Suga Hiroshi

  Department Of Chemistry Faculty Of Science Osaka University

• Arai Naoto

  Department of Chemistry, Faculty of Science, Osaka University

• Suga Hiroshi

  Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University

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