Erlangen 2018 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Laser Assisted Mass Spectrometry

MS 2.3: Vortrag

Montag, 5. März 2018, 14:45–15:00, R 1.020

Progress in spatially resolved ultra-trace analysis on plutonium containing particles by rL-SNMS — •Hauke Bosco¹, Martin Weiß¹, Manuel Raiwa¹, Klaus Wendt², and Clemens Walther¹ — ¹Institute for Radioecology and Radiation Protection, Leibniz Universität Hannover, Germany — ²Institute of Physics, Johannes-Gutenberg Universität Mainz, Germany

The resonant laser secondary neutral mass spectrometry (rL-SNMS) system at the IRS in Hanover has been previously tested for its sensitivity to plutonium, uranium and other elements on synthetic and mineral samples. After these first test measurements, hot particles from the Chernobyl exclusion zone have been measured and influences of insulating sample materials instead of conductive bulk samples have been investigated. As a result, the omnipresent background of the measurement process could be lowered to a minimum, so that the signal to noise ratio has been increased. Furthermore, significant progress in suppression of isobars could be achieved, for example non-resonantly ionized uranium 238 as interfering signal for plutonium 238. In addition, further elements like fission products and transuranium elements have been tested. Results of the progression and improvements will be presented.