Gradient Shielding for Scintillation Detector NaI(TI) Using multiple Materials


  • Department of Physics, College of Science, University of Thi-Qar, Iraq
  • Department of Physics, College of Science, University of Thi-Qar, Iraq


In this research, we studied the graded shielding using one of gamma-ray spectroscopy techniques, which consists of a scintillation detector sodium iodide activated by thallium NaI (Tl) with dimensions of 3"×3" and its electronic accessories .Shielding is fundamentally necessary to minimize the influence of ambient radiation, which consists of single or multiple layers of different materials, such as copper, aluminum and fiberglass, in addition to the lead shield manufactured with a thickness 3cm and through this work it led to reducing the values of the Compton edge and background scattering using industrial source of Cs-137.
This method works to attenuate unwanted complications, which leads to reducing the count rates in some
channels. These new layers should not contain any materials that would add new contributions to the radiation background, ultimately eliminating the complications resulting from the use of the lead shield.Theexperimental results and theoretical conclusion show consistent.


[ 1] Muhammad Ibrahim Al-Jarallah and d. Adel Abdullah, “Radiation and Water,” The first edition, (1983).

Al sadi, M.Sc. thesis, University of Babylon, (2010).

Claus Grupen, Introduction to Radiation Protection, Springer, 2010.

Alan Martin ,Samharbison, Karenbeach ,Peter Cule, Aan Introduction to radiation protection sixthedition, (2012).

Daniel R. Mc Alister, Ph.D, University Lane Lisle, Gamma Ray Attenuation Properties of Common Shielding Materials, 2013.

Jahan Zeb, Waheed Arshed, S. Salman Ahmad, Radiation Dose

Reduction by Water Shield, Pakistan Institute of Nuclear Science & Technology.

Waly E S A and Bourham M A 2015 Comparative study of different concrete composition as gamma- ray shielding materials Ann. of Nucl. Energy 85 p 306-310.

Hossain M, Islam S, Quasem M, and Zaman, M. 2010 Study of shielding behaviour of multilayer shields containing PB and BX Indian J. of Pure and App. Phys. 48(12) p 860- 868.

Shultis J K and Faw R E 2005 Radiation shielding technology Health Phys. 88(6) p 587- 612. [10] U. N. S. C. o. t. E. o. A. Radiation, "UNSCEAR 2000 Report Vol. I UNSCEAR 2000 Report Vol. I– Sources and effects of ionizing Sources and effects of ionizing radiation," Report to the General Assembly, with scientific annexes United Nations, New York, 2000.

Daniel R. McAlister ,Gamma Ray Attenuation Properties of Common Shielding Materials, Ph.D. PG Research Foundation, Inc. 1955 University Lane Lisle, IL 60532, USA.

J. Hansman, Design and construction of a shield for the 900 _ 900 NaI(Tl) welltype detector, Nucl. Technol. Radiat. Prot. 29 (2014) 165-169.

S. Sen, A. Chandra, D. Pramanik, M.S. Sarkar, Study of Intrinsic Photo peak Efficiency of NaI ( Tl ) Detectors at 662 KeV, Proceeding DAE Symo, Nucl. Phys.58 (2013) 934-935

A. Jehouani, R. Ichaoui, M. Boulkheir, Study of the NaI(Tl) efficiency by Monte Carlo method, Appl. Radiat. Isot. 53 (2000) 887-891

Majid SA, Balamesh A. Imaging corrosion under insulation by gamma ray backscattering method. Middle East Non Sharma destructive Testing Conference & Exhibition. Bahrain, Manama; 2005.

Wei-Kan, et Backscattering Spectrometry, Academic Press Inc.,1978.