Response Function Test of Marine γ-Spectrometry with Different Detector Material

Abstract:

The marine radioactivity measurement is the low-level radiation measurement, whose accuracy mainly depends on the material and design of the detector. However, the currently research results mainly focus on the qualitative research. In this paper, a Monte Carlo code MCNP was utilized to simulate the comparation of the energy spectra of several relevant γ rays recorded by detectors immersed in seawater, The detection efficiency and the effective detection distance of these detectors to the radionuclides of ¹³⁷Cs dispersed in seawater were calculated．The results of our experiment shown that the effective detection distance of these detctors to γ radionuclides depends on the detector material and γ-ray energy. The LaBr detector has the best price performance ratio, however, considering the balance between the low-cost and highly detection efficiency, the NaI detector is also a better choice.

• Periodical: Key Engineering Materials (Volume 500)
• Pages: 108-113
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.500.108
• Online since: January 2012
• Authors: Tao Chi, Ding Song Zhang
• Keywords: Detection Efficiency, Effective Detection Distance, Energy Resolution, Radioactive Material

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