title: Efficiency calibration and coincidence summing correction for a large volume (946cm3) LaBr3(Ce) detector: GEANT4 simulations and experimental measurements.
abstract: The paper describes the studies on efficiency calibration and coincidence summing correction for a 3.5″×6″ cylindrical LaBr3(Ce)detector. GEANT4 simulations were made with point sources, namely,60Co,94Nb,24Na,46Sc and22Na. The simulated efficiencies, extracted using60Co,94Nb,24Na and46Sc that emit coincident gamma rays with same decay intensities, were corrected for coincidence summing by applying the method proposed by Vidmar et al. (2003). The method was applied, for the first time, for correcting the simulated efficiencies extracted using22Na that emits coincident gamma rays with different decay intensities. The measured results obtained using60Co and22Na were found to be in good agreement with simulated results.
authors: Dept. of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India.
authors: M
authors: M
authors: Dhibar
authors: Dept. of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India.
authors: D
authors: D
authors: Mankad
authors: Dept. of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India.
authors: I
authors: I
authors: Mazumdar
authors: Dept. of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India. Electronic address: anilgfph@iitr.ac.in.
authors: G Anil
authors: GA
authors: Kumar
keywords: Coincidence summing; Efficiency calibration; GEANT4; Gamma spectroscopy; Positron emitter; Scintillator detector