The fission fragments and heavy ions tracks in CR-39 detectors registered by Cf-252 radioactive source have been observed by using photo-spectrometric techniques. CR39 detectors were exposed at 5 cm distance from radioactive source for registering nuclear tracks created by nuclear particles emitted from Cf-252 radioactive source. Cr-39 detectors were etched in 6N NaOH solution at 70 C for 400 m...

Alpha-particle radiobiological experiments involve irradiating cells with alpha particles and require thin biocompatible materials which can record alpha-particle traversals as substrates for cell cultures. The biocompatibilities of chemically etched CR-39 solid-state nuclear track detectors (SSNTDs) using aqueous NaOH or NaOH/ehtanol are studied through the abundance and morphology of the cult...

The bulk etch rate for CR-39 in NaOH/ethanol was faster than those in aqueous solution of NaOH (NaOH/H2O). Furthermore, a layer of precipitate always accumulates on the surface of CR-39 detector during etching in NaOH/ethanol, which is absent during etching in NaOH/H2O. In the present work, mass spectrometry results have shown that the same etched products are present in the etchants of NaOH/H2...

introduction cr-39 detectors are widely used for radon and progeny measurement in the air. in this paper, using the monte carlo simulation, the possibility of using the cr-39 for direct measurement of radon and progeny in water is investigated. materials and methods assuming the random position and angle of alpha particle emitted by radon and progeny, alpha energy and angular spectrum that arri...

The effect of pre-gamma irradiation on track density, bulk etch rate and light absorbance in CR-39 was investigated. CR-39 detectors were irradiated with gamma doses over a range of 0 to 280 kGy (0 to 28 Mrad). The detectors were overlaid with 0.77 mm of polyethylene and exposed to a known fluence of 252Cf spontaneous fission neutrons. All detectors were then etched in 6.25N sodium hydroxide so...

Introduction CR-39 detectors are widely used for Radon and progeny measurement in the air. In this paper, using the Monte Carlo simulation, the possibility of using the CR-39 for direct measurement of Radon and progeny in water is investigated. Materials and Methods Assuming the random position and angle of alpha particle emitted by Radon and progeny, alpha energy and angular spectrum that arri...

OBJECTIVE To compare the slot-scan digital radiography (SSDR) of the lower extremity region and the computed radiography (CR) method with respect to the image quality and radiation exposure. MATERIALS AND METHODS We enrolled 54 patients who underwent both the SSDR and CR of the lower extremities. The study evaluated and statistically compared the image quality of four features (outer cortex, ...

Among the general requirements to accredit a radon measuring service, outlined in the international standards as EN ISO/IEC 17025, the technical requirements play the main role in the quality assurance of a testing service. The reliability of the assessment of the radon air concentration in workplaces and dwelling is determined by many factors the most important being the physical measuring met...