The design of a Nai(Tl) crystal in a system optimised for high-throughput and emergency measurement of iodine 131 in the human thyroid

Vrba, T.; Fojtík, Pavel

doi:10.1016/j.radphyschem.2014.05.006

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…The light weight feature of the integrated, compact NaI(Tl) detector are very much suitable for insitu measurements. Several researchers across the world have used NaI(Tl) detectors for in-situ measurements in underwater, road transport inspection, forest, building materials, soil and mineral samples (Bezuidenhout, 2013;Golosov et al, 2000;Jaquiel, Carlos, & Avacir, 2010;Kovler et al, 2013;Kwang, In, Sung-Woo, & Ho-Sik, 2008;Plamboeck, Nylen, & Agren, 2006;Povinec, Osvath, & Baxter, 1996;Vlachos & Tsabaris, 2005;Vrba & Fojtik, 2014).…”

Section: Introductionmentioning

confidence: 99%

Experimental and simulated study of detector collimation for a portable 3″ × 3″ NaI(Tl) detector system for in-situ measurements

Kiran¹,

Ravindraswami²,

Eshwarappa³

et al. 2015

Journal of Radiation Research and Applied Sciences

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The effect of detector collimator and scatterer thickness on multiple Compton backscattered gamma photons is studied. Gamma photons from a 137 Cs source of 5.8 mCi, is allowed to fall on Carbon, Aluminium, Iron and Copper targets and the scattered photons are detected by a properly shielded 76 mm Â 76 mm NaI(Tl) scintillation detector located at 90 to the incident beam. To extract the contribution of multiple scattered photons from the measured spectra, single scattered distribution is remodelled analytically. The thickness at which the multiple scattered photons saturate is determined for different detector collimator apertures and scatterer thicknesses. The variation of saturation thickness, Signal-to-Noise (S/N) ratio, Multiple Scattering Fraction (MSF) for different materials and collimator sizes are studied and compared with the available literature. Monte Carlo simulated calculations using MCNP code supports the present experimental work.

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