DETERMINATION OF THE COINCIDENCE CORRECTION FACTOR ON MEASURING SEMICONDUCTOR DETECTOR EXPERIMENTAL EFFICIENCY

Trịnh Văn Cường, Trần Tuấn Anh, Hồ Mạnh Dũng, Hồ Văn Doanh, Nguyễn Thị Thọ, Hà Anh Tú

Tóm tắt


The efficiency is an important factor in measuring the semiconductor detector which directly impacts to experimental results of Instrumental neutron activation analysis. The efficiency curve was determined by standard source measurements including Cd-109, Cs-137, Mn-54, Co-60, Eu-152, Ba-133. However, corresponding to a multi-energy radioisotope that emits more two gammas, the coincidence effect appears when both gammas having the same direction arrive at the volume of the detector in the resolution of the spectrometer.  The coincidence effect is clearer on a closer distance, so the efficiency is more significantly different than the correct value. In this paper, the coincidence effect is researched and calculated at four positions as well as verified at three positions from the detector window.


Từ khóa


Neutron activation analysis, Coincidence effect; Coincidence correction factor; Efficiency; The Kafala Method.

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Anas M. Ababneh, M. M. (2015). Coincidence summing correction in HPGe gamma-ray spectrometry for Marinelli-breakers geometry using peak to total (P/T) calibration. Journal of Radiation research and applied sciences , 323-327.

Cline, J. E. (1968). Studies of detection efficiencies and operating characteristics of Ge(Li) detectors. IEEE Transactions on Nuclear Science, 198-213.

D. M. Monthomery, G. A. (1995). A Method for Assessing and correcting coincidence summing effects for Gamma detector efficiency calibrations. Journal of Radioanalytical and Nuclear Chemisrty, Articles, Vol. 193, No.1, 71-79.

G.L Molnar, Z. R. (2002). Wide energy range efficiency calibration method for Ge detectors. Nuclear Instruments and Methods in Physics Research A, 140-159.

Kafala, S. I. (1995). Simple method for true coincedence summing correction. Journal of Radioanalytical and Nuclear Chemistry, 105-114.

NuDat. (n.d.). Nuclear Data Retrieval. Retrieved from Nuclear Data Retrieval: http://www.nndc.bnl.gov

Thomas M. Semkow, G. M. (1990). Coicidence summing in gamma-ray spectroscopy. Instruments and Methods in Physic Research A, 437-444.

Tim Vidmar, M. K. (2007). A method for calculation of true coicidence summing correction factors for extended sources. Applied Radiation and Isotopes, 243-246.


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