Chemistry International Blank Image
Chemistry International Text Image Link to Chemistry International Blank Image Chemistry International Blank Image Chemistry International Blank Image
Chemistry International Blank Image
Chemistry International Blank Image
Chemistry International Text Image Link to Current Issue
Chemistry International Text Image Link to Past Issues
Chemistry International Text Image Link to Officer's Columns
Chemistry International Text Image Link to Features
Chemistry International Blank Image
Chemistry International Text Image Link to Up for Discussion
Chemistry International Text Image Link to IUPAC Wire
Chemistry International Text Image Link to Project Place
Chemistry International Text Image Link to imPACt
Chemistry International Text Image Link to Bookworm
Chemistry International Text Image Link to Internet Connections
Chemistry International Text Image Link to Conference Call
Chemistry International Text Image Link to Where 2B and Y
Chemistry International Text Image Link to Symposia
Chemistry International Text Image Link to CI Indexes
Chemistry International Text Image Link to CI Editor
Chemistry International Text Image Link to Search Function
Chemistry International Text Image Link to Information

 

Chemistry International Text Image Link to Previous Issue Chemistry International Text Image Link to Previous Page Chemistry International Text Image Link to This TOC Chemistry International Text Image Link to Next Page Chemistry International Text Image Link to Next Issue

Vol. 29 No. 2
March-April 2007

The Project Place | Information about new, current, and complete IUPAC projects and related initiatives
See also www.iupac.org/projects


Recommendations for Isotope Data in Geosciences

A joint project between the Inorganic Chemistry and Analytical Chemistry Divisions of IUPAC and the International Union of Geological Sciences (IUGS) has been approved to evaluate radioisotope decay data used in the geosciences and planetary sciences for dating. Significant disparities exist between data used in these communities and those employed in physics and chemistry. The project will draw on complementary expertise represented in IUGS and IUPAC. Previous work by IUGS (Working Group “Decay Constants in Geochronology”) and IUPAC (Commissions II.1 “Isotopic Abundance” and V.7 “Radiochemistry and Nuclear Techniques”) will be included, harmonized, and updated. Through the project, IUGS-IUPAC interaction will be tightened.

Initial work (2006–2008) will focus on nine nuclides used in geochronology (40K, 87Rb, 138La, 147Sm, 176Lu, 187Re, 232Th, 235U, 238U). Half-lives, decay schemes, and isotopic compositions of parent and daughter elements will be critically evaluated. Uncertainty analyses need to be adequately reassessed following ISO/GUM procedures. Successive phases will both expand the number of nuclides and refine the isotopic abundances in view of additional recommendations.

The task group, chaired by Paul Renne, includes Mauro Bonardi, Paul De Bièvre, Ales Fajgelj, Norman Holden, Dunyi Liu, and Igor Villa.

For more information contact Task Group Chairman Paul Renne <prenne@bgc.org>.

www.iupac.org/projects/2006/2006-016-1-200.html


Page last modified 16 April 2007.
Copyright © 2003-2007 International Union of Pure and Applied Chemistry.
Questions regarding the website, please contact edit.ci@iupac.org
Link to CI Home Page Link to IUPAC E-News Link to IUPAC Home Page