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A new TSAC (Thick Source Alpha Particle Counting spectrometry) setup of high geometrical efficiency and low intrinsic background was built to measure the alpha particles coming from the 238U and 232Th decay chains radionuclides with concentrations down to the ppm level. It was designed to test the 226Ra/230Th method, which is the only direct metal dating method proposed to date. Micro-PIXE, micro-RBS...
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