As part of the development of dedicated scintillation cameras for breast imaging, we compared the performances of two dedicated cameras with a standard clinical camera (Siemens Orbiter). One dedicated camera was based on a single position-sensitive photomultiplier tube (PSPMT) coupled to a 6 cm by 6 cm by 6 mm NaI(Tl) crystal. The other (LumaGem) was based on multiple-PSPMTs coupled to a 2 mm 2...

The 12 NaI(Tl)-detector gamma-ray spectrometry system (GSS) “Romashka”[1,2] has recently been equipped with a new computer controlled HVSys 16 channel high-voltage power supply with preselected single channel polarity [3] (Fig.1). In order to do some preliminary checks of the GSS chains’ characteristics, a single channel gamma-spectrometry tract was commissioned. It was consist of a single Roma...

In this work we demonstrate an in-depth analysis and characterization of the Autoencoder Radiation Anomaly Detection (ARAD) algorithm. ARAD is a deep convolutional autoencoder designed to detect anomalous radioactive signatures in gamma-ray spectra collected by NaI(Tl) detectors. This model works learning dimensionally constrained representation background called latent space. The space cannot ...

The DAMA/NaI experiment (≃ 100 kg highly radiopure NaI(Tl)) was proposed , designed and realised to effectively investigate in a model independent way the presence of a Dark Matter particle component in the galactic halo by exploiting the annual modulation signature. With a total exposure of 107731 kg · day, collected over seven annual cycles deep underground at the Gran Sasso National Laborato...

Rapid yet accurate measurement of the I activity in the thyroid gland as well as in the air, water and vegetation may have an important role in obtaining quantitative information on internal doses for the people living in the vicinity of nuclear facilities shortly after an accidental release of radionuclides (1-2). Whole body counting technique is still the standard method for measuring radionu...