Conveners
Technical Session 3D: Nuclear Forensic Science: Radiochronometry
- K. Peräjärvi (Finland)
- M.B.L. Ong (Singapore)
Mr
R. Williams
(United States of America)
09/07/2014, 11:10
Oral
The model-date of a nuclear material is a parameter established at the time it was last chemically purified. Assuming the material is homogeneous, this parameter is fixed and exact, but it may or may not be the same as the purification date. The decay of a radioactive parent to a radioactive or stable daughter is the basis of the radiochronometers that record this model-date. If upon...
Dr
A. HUBERT
(CEA, France)
09/07/2014, 11:30
Oral
Analytical laboratories at CEA/DIF are part of the NWAL (Network of Analytical Laboratories in support of IAEA's nuclear safeguards) for the analysis of environmental samples since 2001 for both bulk and particle analysis.
Part of the expertise inherited from environmental analysis is now used to develop capabilities in nuclear forensics analysis. Two projects of analytical developments are...
Ms
E. Keegan
(Australia)
09/07/2014, 11:50
Oral
Uranium series disequilibria measurements have been used for radiometric dating for many decades, mainly for elucidating geological and environmental processes. Recently, such measurements have been applied to the dating of nuclear materials (i.e., determination of the time since the material was last processed) for nuclear forensic applications. While 230Th/234U is the most widely employed...
Prof.
L. Lakosi
(Hungary)
09/07/2014, 12:10
Oral
A new method for uranium age dating was developed using gamma-spectrometry based on the daughter/parent 214Bi/234U by direct measurement. The daughter/parent ratio as a function of decay time is widely used for determining the age of radioactive samples. In the case of uranium, age dating is somewhat difficult because the relevant isotopes (234U, 235U, 238U) have very long half-lives, so only...
