Measurements of the quenching factor for sodium recoils in a 5 cm diameter NaI(Tl) crystal at room temperature have been made at a dedicated neutron facility at the University of Sheffield. The crystal has been exposed to 2.45 MeV mono-energetic neutrons generated by a Sodern GENIE 16 neutron generator, yielding nuclear recoils of energies between 10 and 100 keVnr. A cylindrical BC501A detector...

Radiation detectors, like doped NaI, are commonly used in the field for the determination of gamma dose-rates. In most cases, and even though these systems generally allow one to record the full gamma spectrum between 0 to around 3 MeV, this dose-rate is computed from the count rates recorded in a limited number of "windows" (Aitken, 1985). With this technique, only a small part of the spectrum...

UNLABELLED A whole-body PET scanner, without interplane septa, has been designed to achieve high performance in clinical applications. The C-PET scanner, an advancement of the PENN PET scanners, is unique in the use of 6 curved NaI(Tl) detectors (2.54 cm thick). The scanner has a ring diameter of 90 cm, a patient port diameter of 56 cm, and an axial field of view of 25.6 cm. A (137)Cs point sou...

A rotating NaI(TI) scintillator detector and a collimated Cs 137 source producing gamma rays with an energy of 662 keV scattered incoherently by aluminum (Al) and copper (Cu) scatterers through the angles from 0 to 120° are used to study Compton scattering. The Compton scattering effect is investigated and found that the energy of scattered gamma ray decreases as the scattering angles increases...

The COSINE-100 experiment has been operating with 106 kg of low-background NaI(Tl) detectors to test the results from DAMA/LIBRA experiment, which claims have observed dark matter. However, since background crystals used in is 2–3 times higher than that DAMA detectors, no conclusion regarding claimed observation could be reached. Therefore, we plan upgrade current next phase, COSINE-200, by usi...

The Monte Carlo method was used to calculate the photon detection efficiency and energy resolution curves for a 1.500 100 NaI(Tl) scintillator detector (crystal þ housing þ photomultiplier tube material equivalent) exposed to gamma rays in the energy range from 20 keV to 662 keV. This work aims to design a precise computational model, based in Monte Carlo simulation, which can be used in practi...

In the months of December 2021 to March 2022 ITA group research (ATMOSRAD)* have made monitoring rainfall and low energy gamma rays in São José dos Campos, Brazil region. A sodium iodide NaI (Tl) (3” x 3”) scintillator was used, coupled a photomultiplier (PM) associated electronics. All these instruments are capable measuring ionizing radiation between 200 keV 10.0 MeV. It can be seen from meas...