Measurement of the angular correlation between the two gamma rays emitted in the radioactive decays of a ⁶⁰Co source with two NaI(Tl) scintillators

Abstract

We implemented a didactic experiment to study the angular correlation between the two gamma rays emitted in typical 60Co radioactive decays. We used two NaI(Tl) scintillators, already available in our laboratory, and a low-activity 60Co source. The detectors were mounted on two rails, with the source at their center. The first rail was fixed, while the second could be rotated around the source. We performed several measurements by changing the angle between the two scintillators in the range from 90o to 180o. Dedicated background runs were also performed, removing the source from the experimental setup. We found that the signal rate increases with the angular separation between the two scintillators, with small discrepancies from the theoretical expectations.

Organic–Inorganic Hybrid Perovskite Scintillator for Neutron and γ-Ray Detection

“…Inorganic scintillators, such as NaI and Lu 1.8 Y 0.2 SiO 5 :Ce (LYSO:Ce), are generally used for γ-ray detection because of their high density and high light yield. , However, they lack sensitivity for fast neutron detection because of their low interaction cross section. Plastic and liquid scintillators, such as EJ200 and BC501, have high detection efficiency to fast neutrons as they are rich in hydrogen atoms. , However, these scintillators hardly respond to γ-rays due to their low effective atomic number ( Z eff ) and low light yield.…”

“…Considering that detectors containing Li will enhance the detection efficiency of low-energy neutrons owing to the 6 Li(n,α) reaction and efficiently passivate defects and reduce trap state density to an obvious enhancement of the light yield, 23 Li was selected as a dopant. The feasibility of neutron and γ-ray detection of LPEA was examined, and the responses of different neutron energies and 60 Co γ-rays were acquired.…”