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Determination of dead time in the study of isotopic composition of copper and zinc solutions enriched 65тCu and 68Zn
https://doi.org/10.32446/0368-1025it.2025-5-98-104
Abstract
In measuring the isotopic composition of substances and materials using an inductively coupled plasma quadrupole mass spectrometer, the main source of bias in the measured isotopic ratios is the detector dead time. In this regard, an important step in the development of reference materials for isotopic composition is the determination and correction of the results for dead time. This work is devoted to the determination and study of the effect of dead time on the results of isotopic ratios in the study of the isotopic composition of copper and zinc solutions enriched in 65Cu and 68Zn isotopes. The study considers several methods for determining the dead time based on measurements of the isotopic ratios of 63Cu/65Cu, 64Zn/68Zn, 66Zn/68Zn, 67Zn/68Zn, 70Zn/68Zn in solutions with different mass fractions of copper and zinc, as well as a method based on comparing the pulse and analog detector signal on an inductively coupled plasma quadrupole mass spectrometer. The uncertainties of dead time measurements by different methods are calculated. In the course of the work, optimal methods for determining the dead time are found and selected for further research. The detector dead time is (76±4) ns for enriched 65Cu solution and (42±4) ns for enriched 68Zn solution.
About the Author
E. Vostroknutova
Ural Scientific Research Institute for Metrology – Affiliated branch of the D. I. Mendeleyev Institute for Metrology
Russian Federation
Russian Federation
Elena V. Vostroknutova
Yekaterinburg
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For citations:
Vostroknutova E. Determination of dead time in the study of isotopic composition of copper and zinc solutions enriched 65тCu and 68Zn. Izmeritel`naya Tekhnika. 2025;74(5):98-104. (In Russ.) https://doi.org/10.32446/0368-1025it.2025-5-98-104
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