Study on the Long Term Stability on the Superfluid Transition Temperature of Helium
LIN Peng1,YU Li-hong2,ZHANG Zhe1
1. National Institute of Metrology, Beijing 100013, China
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Abstract The long term stability of the superfluid transition temperature of helium has been studied in the past ten years using six cells sealed in 2000. The measurements are made in four laboratories with a regular procedure. A rhodium-iron resistance thermometer with series number of 229841 is used at forty-three measurements to realize the superfluid transition temperature of helium with the standard deviation of 0.035 mK.
LIN Peng,YU Li-hong,ZHANG Zhe. Study on the Long Term Stability on the Superfluid Transition Temperature of Helium[J]. Acta Metrologica Sinica, 2011, 32(3): 244-248.
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2011, Vol. 32 
