• SHAIKH ABDUL LATIF

      Articles written in Pramana – Journal of Physics

    • Efficiency calibration of $\gamma$-ray detector for extended sources

      ANIMESH KUMER CHAKRABORTY MD SHUZA UDDIN MD ASAD SHARIFF SHAIKH ABDUL LATIF MD ABDUR RASHID MAYEEN UDDIN KHANDAKER

      More Details Abstract Fulltext PDF

      Precise identification and quantification of radioisotope in a sample largely depend on the accuracy of the full-energy peak efficiency of the detector. It is generally observed that the efficiency for a given energy of point-like sources is not the same as the extended source. However, number of correction factors such as detector geometry, photon attenuation, coincidence-summing, etc. may reduce such a difference in efficiency regardless of sources, or they should be considered in the measurement of extended samples. In connection to this, the variation of absolute photopeak efficiency of a high-purity germanium (HPGe) detector with the distances from the surface of the detector as well as with the γ-ray energies were investigated using $\gamma$-ray standard point sources. We present a method to determine the loss of efficiencies in radioactivity measurement of the thin extended radioactive disc samples in comparison to point source.

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