TY - JOUR
T1 - Developments toward the measurement of I-129 in lignite
AU - Wallner, Gabriele
AU - Steier, Peter
AU - Brandl, Thomas
AU - Friesacher, Maria
AU - Hille, Peter
AU - Kutschera, Walter
AU - Ayromlou, Shahram
AU - Tatzber, Michael
N1 - DOI: 10.1016/j.nimb.2007.01.217
Coden: NIMBE
Affiliations: Institut für Anorganische Chemie, Universität Wien, Währinger Str. 42, A-1090 Wien, Austria; Institut für Isotopenforschung und Kernphysik, Universität Wien, Währinger Str.17, A-1090 Wien, Austria
Adressen: Wallner, G.; Institut für Anorganische Chemie; Universität Wien; Währinger Str. 42 A-1090 Wien, Austria; email: [email protected]
Source-File: 722Scopus050308.csv
Import aus Scopus: 2-s2.0-34248200555
Importdatum: 06.03.2008 15:52:33
09.02.2010: Datenanforderung UNIVIS-DATEN-DAT.RA-2 (Import Sachbearbeiter)
PY - 2007
Y1 - 2007
N2 - The concentration of the long-lived radioisotope 129I was determined in two Austrian lignite samples through 129I/127I isotopic ratio measurement by AMS, and through a measurement of the total iodine content with an ion-selective electrode. In addition, the uranium concentration of the samples was measured by α-spectrometry. From the mean values of the uranium concentrations the steady-state concentration of 129I in lignite was calculated; the 129I concentrations derived from the measured 129I/127I ratio and the total iodine content, however, were much higher than expected, clearly indicating that lignite does not represent a closed system for 129I. The observed high ratio in the sample from the surface mine suggests the presence of anthropogenic 129I, while the source for the high 129I concentrations in the subsurface lignite is the addition of fissiogenic 129I either from the lignite itself (from layers with much higher U content than in the samples investigated) or from nearby geological formations rich in uranium.
AB - The concentration of the long-lived radioisotope 129I was determined in two Austrian lignite samples through 129I/127I isotopic ratio measurement by AMS, and through a measurement of the total iodine content with an ion-selective electrode. In addition, the uranium concentration of the samples was measured by α-spectrometry. From the mean values of the uranium concentrations the steady-state concentration of 129I in lignite was calculated; the 129I concentrations derived from the measured 129I/127I ratio and the total iodine content, however, were much higher than expected, clearly indicating that lignite does not represent a closed system for 129I. The observed high ratio in the sample from the surface mine suggests the presence of anthropogenic 129I, while the source for the high 129I concentrations in the subsurface lignite is the addition of fissiogenic 129I either from the lignite itself (from layers with much higher U content than in the samples investigated) or from nearby geological formations rich in uranium.
U2 - 10.1016/j.nimb.2007.01.217
DO - 10.1016/j.nimb.2007.01.217
M3 - Article
SN - 0168-583X
VL - 259
SP - 714
EP - 720
JO - Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
JF - Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions with Materials and Atoms
IS - 1
ER -