Titan's Atmospheric Temperatures, Winds, and Composition.
Science 308 (2005) 975-978
Temperatures, Winds, and Composition in the Saturnian System
Science 307 (2005) 1247-1251
Standardisation of 210Pb
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 52:3 (2000) 381-385
Abstract:
The standardisation of 210Pb is complicated by the presence of the daughters, 210Bi and 210Po. In addition, the low energies of the beta emissions from 210Pb make it difficult to obtain high detection efficiencies in an atmospheric proportional counter and hence produce the need for large extrapolations with consequential large uncertainties when extrapolating to unit efficiency with the conventional 4pi(PC)-gamma-coincidence technique. In order to produce a reliable standardisation, it is necessary to remove the daughter products. A solution of 210Pb was therefore chemically separated from its daughters and then standardised using the conventional 4pi(LS)-gamma-coincidence technique. The low energy (46 keV) and low emission probability (4%) of the associated photon emissions effectively rules out the possibility of using ionisation chambers as secondary standard transfer instruments for this nuclide. A germanium spectrometer therefore was calibrated for this purpose using 241Am as a normalising agent. The results of this work are presented together with an analysis of the standardisation uncertainties that can be achieved in practice.Standardization of 153Sm
Applied Radiation and Isotopes Elsevier 49:9-11 (1998) 1345-1347
A second intercomparison of 222Rn measurement systems in European laboratories
Applied Radiation and Isotopes Elsevier 47:9-10 (1996) 835-840