Abstract
Abstract For the calibration of the radioluminescence detection systems developed within 19ENV02 RemoteALPHA EMPIR project, two purely optical radiation-based devices, which accurately simulate the radioluminescence induced in air nitrogen by an alpha-particle emitted from a planar radionuclide-based sample, were designed, manufactured, and characterized. The variable low-photon flux radiance sources are based on a combination of two integrating spheres and LEDs as UV-A and UV-C radiation sources. The calibrated maximum integrated photon radiances are 7.5·1011 s−1·m−2·sr−1 for the UV-A (CWL = 337 nm, FWHM = 10 nm) and 3.0·1010 s−1·m−2·sr−1 for the UV-C (CWL = 260 nm, FWHM = 20 nm) spectral range with relative standard uncertainties (k=1) from 5 % (UV-A) to 8 % (UV-C).
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