Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Applications of PERALS-Alpha Spectrometry for the Investigation of Radionuclides in Water Samples

Version 1 : Received: 30 May 2021 / Approved: 31 May 2021 / Online: 31 May 2021 (11:16:23 CEST)

How to cite: Zehringer, M.R.; Kammerer, F.; Pregler, A. Applications of PERALS-Alpha Spectrometry for the Investigation of Radionuclides in Water Samples. Preprints 2021, 2021050743 (doi: 10.20944/preprints202105.0743.v1). Zehringer, M.R.; Kammerer, F.; Pregler, A. Applications of PERALS-Alpha Spectrometry for the Investigation of Radionuclides in Water Samples. Preprints 2021, 2021050743 (doi: 10.20944/preprints202105.0743.v1).

Abstract

In this paper, experiences of the last 20 years with the PERALS-technique are described. PERALS stands for Photo Electron Rejecting Alpha Liquid Scintillation. This LSC-technique was developed by Jack McDowell in the 70ies and is a powerful technique for the analyses of many natural alpha nuclides. The principle is based on a selective extraction of the radionuclide from the water phase by means of a complexing or ion pair reagent. The extractant contains also a suitable cocktail for the scintillation counting. Therefore, the extract can be analysed directly after the extraction step. After removing quenchers, such as oxygen, and the proper setting of a pulse shape discriminator, alpha pulses can be counted with a photomultiplier. The paper describes the development of robust analysis schemes for the determination of traces of polonium, radon, radium, strontium, thorium, uranium and other actinides in water samples (groundwater, rain water, river water, drinking water, mineral water, sea water).

Subject Areas

PERALS; alpha spectrometry; Polonium; Radon; Radium; Radiostrontium; Thorium; Uranium; Actinides

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