Study on Energy calibration of LaBr3(Ce) Scintillation Detector

The energy calibration of LaBr3(Ce) detector is carried out by using the experimental methods of standard radioactive source, K fluorescence X-rays source and crystal diffraction monochromatic X-rays source, and the energy calibration curve is given. The calibration results using K fluorescence X-rays source and crystal diffraction monochromatic X-rays source are close to the calibration results of standard radioactive source, which verifies the rationality and reliability of the two experimental methods for the detector energy linear calibration. Using the fitting formula obtained by K fluorescence X-rays source and crystal diffraction monochromatic X-rays source, the relative error between the energy fitting value and the real value of Pb-210, Am-241, Cd-109 and Co-57 radioactive sources is less than 3.5%. For the detection of the energy range of (30–120) keV, the LaBr3(Ce) detector can basically determine the energy of the measured ray.