Further Progress Toward the Determination of Ttp-x(22Ne)

Following the start of exploration of the problem of the effect of neon isotopes on the triple-point temperature in 2005, further progress was achieved in 2006-2008, and published in 2008. This paper summarizes the advances to date in our understanding as obtained from further work done in 2008-2009 on five basic aspects of the problem: new isotopic assays; new thermal measurements on neon of ¿natural¿ composition; the feasibility of obtaining a value of the slope dTtp/dx(22Ne) with an accuracy sufficient for the purpose; the possible occurrence of isotopic fractionation during the process of sealing the samples in the cells; and new thermal measurements on the pure isotopes 20Ne and 22Ne. The recently collected information is sufficient to state that it will eventually be possible to fulfill within 2010 the goal of recommending to the CCT solutions for the correction, with an accuracy fitting the purpose, of the neon isotopic effect on Ttp, to be included in a future revision of the Technical Annexe to the ¿mise en pratique¿ of the kelvin.

PAVESE F.;  FAHR M.;  HERMIER Y.;  HILL K.D.;  LIPINSKI L.;  NAKANO T.;  PERUZZI A.;  SAKURAI H.;  SPARASCI F.;  STEUR P.P.M.;  SMYRKA-GRZEBYK A.;  TAMURA O.;  TEW W.L.;  VALKIERS Staf;  VAN GEEL J.; 

2010-12-02

SPRINGER/PLENUM PUBLISHERS

JRC60339

0195-928X,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC60339,   

10.1007/s10765-010-0817-6,