engleski

Salty crackers as dosimeters in radiological and nuclear emergencies: improving sample preparation

When a radiological or nuclear (R/N) emergency occurs, the categorization of individuals into those who are unaffected and those requiring medical intervention is a high priority. At times, a professional dosimeter is not available and therefore some common belongings may be used as fortuitous dosimeters. The preparation of these objects for the measurement should be such as to give the most accurate results. This paper confronts the problem of choosing the right method for preparing the samples from salty crackers which are meant to be analyzed by photo- stimulated luminescence (PSL) technique. The crackers were crumbled into three different sizes: bigger pieces (about 1 cm), medium pieces (about 0.5 cm), and completely powdered. The precision of the results obtained for each type of sample preparation were compared for infrared (890 nm), blue light (470 nm) and combined stimulation, but also studied for two different masses of the samples. The measurements were performed both on unirradiated crackers and irradiated ones (1 Gy). The study was simultaneously conducted by two laboratories (Ruđer Bošković Institute, Croatia and Istituto Superiore di Sanità, Italy) involved in a project (grant No. G5684) supported by NATO Science for Peace and Security Programme.

PSL ; salty snacks ; retrospective dosimetry

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