@ARTICLE{Yin_L._Analysis_2011, author={Yin, L. and Lin, P. and Zhao, J. and Qi, X.}, number={No 1}, journal={Metrology and Measurement Systems}, pages={13-24}, howpublished={online}, year={2011}, publisher={Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation}, abstract={Owing to the dramatic change in the thermal conductivity of 4He when its temperature crosses the transition of superfluid (HeI) and normalfluid (HeII), a sealed-cell with a capillary is used to realize the lambda transition temperature, Tλ. A small heat flow is controlled through the capillary of the sealed-cell so as to realize the coexistence of HeI and HeII and maintain the stay of HeI/HeII interface in the capillary. A stable and flat lambda transition temperature "plateau" is obtained. Because there is a depression effect of Tλ caused by the heat flow through the capillary, a series of heat flows and several temperature plateaus are made and an extrapolation is applied to determine Tλ with zero heat flow. A rhodium-iron resistance thermometer with series number A34 (RIRT A34) has been used in 24 Tλ -realization experiments to derive Tλ with a standard deviation of 0.022mK, which proves the stability and reproducibility of Tλ.}, type={Artykuły / Articles}, title={Analysis of the Factors Affecting the Realization of Lambda Transition Temperature of 4He}, URL={http://journals.pan.pl/Content/89734/PDF/Journal10178-VolumeXVIII%20Issue1_02%20paper.pdf.pdf}, doi={10.2478/v10178-011-0002-7}, keywords={4He, lambda transition temperature, sealed-cell, realization}, }