Study on the Effect of the Self-Attenuation Coefficient on γ-ray Detector Efficiency Calculated at Low and High Energy Regions

Ahmed. M. El-Khatib; ABOUZEID. A. THABET; MOHAMED. A. ELZAHER; MOHAMED. S. BADAWI; BOHAYSA. A. SALEM

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자료유형: 학술저널

저자정보: Ahmed. M. El-Khatib ABOUZEID. A. THABET MOHAMED. A. ELZAHER MOHAMED. S. BADAWI BOHAYSA. A. SALEM

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제2호

발행연도: 2014.1

수록면: 217 - 224 (8page)

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The present work used the efficiency transfer method used to calculate the full energy peak efficiency (FEPE) curves ofthe (2"*2" & 3"*3") NaI (Tl) detectors based on the effective solid angle subtended between the source and the detector. Thestudy covered the effect of the self attenuation coefficient of the source matrix (with a radius greater than the detector's radius)on the detector efficiency. 152 An Eu aqueous radioactive source covering the energy range from 121.78 keV up to 1408.01keV was used. In this study an empirical formula was deduced to calculate the difference between the measured and thecalculated efficiencies [without self attenuation] at low and high energy regions. A proper balance between the measured andcalculated efficiencies [with self attenuation] was achieved with discrepancies less than 3%, while reaching 39% forcalculating values [without self attenuation] due to working with large sources, or for low photon energies.

#Self Attenuation Coefficient #NaI #Tl) Detectors #Full Energy Peak Efficiency #FEPE) #New Empirical Formula and Efficiency Transfer Method

참고문헌 (20)

참고문헌 신청

A. M. El-Khatib / 2012 / Calculation of the Peak Efficiency for NaI(Tl) Gamma Ray Detector Using the Effective Solid Angle Method / Journal of Advanced Research in Physics 3

G. Haase / 1993 / Application of new Monte Carl method for determination of summation and self-attenuation corrections in gamma spectrometry / Nucl. Instrum. Methods A 336 :

K. Debertin / 1979 / Coincidence summing corrections in Ge(Li)-spectrometry at low source-to-detector distances / Nucl. Instrum.Meth.A 158 : 471 ~ 477

L. Moens / 1983 / Calculation of the peak efficiency of high-purity germanium detectors / Int. J. Appl. Radiat. Isot 34 : 1085 ~ 1095

M. Abd-Elzaher / 2012 / Determination of Full Energy Peak Efficiency of NaI(Tl) Detector Depending on Efficiency Transfer Principle for Conversion Form Experimental Values /