Abstract

An approach for alpha spectrometry is introduced that allows measuring alpha spectra at ambient air pressure with energy resolution comparable to measurements in vacuum. The developed prototype equipment uses a semiconductor alpha detector and a honeycomb collimator. Contamination of 1Bq/cm2 at any smooth and flat surface can be detected in approximately 10s data acquisition time, but longer time is needed for radionuclide identification. A hand-held instrument for in-situ measurements can be manufactured opening a wide range of novel applications in alpha spectrometry.

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