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Dependence of Sensitivity of Different Plastic Track Detectors on Etching Temperature [Med J Islamic World Acad Sci]
Med J Islamic World Acad Sci. 1989; 2(2): 139-146

Dependence of Sensitivity of Different Plastic Track Detectors on Etching Temperature

S. M. Farid
From Department of Physics, University of Juba, Juba, Sudan.

Exposures of Cellulose nitrate (Russian) CN (R) and Makrofol-E polycarbonate plastic track detectors to different ions have been obtained from the cyclotron at JINR, Dubna (USSR). In this study 12C, 16O, 20Ne, 40Ar, 50Ti-ions different energies are used as energetic heavy ions for track formation in the detectors. The chemical etching is carried out in stirred (6.00 0.05) N NaOH solution. The dependence of bulk etch rate, Vb and track etch rate, Vt on etching temperature, T is exponential and can be expressed by Arrhenius correlation. The dependence of activation energy for track etching, Et on mass A of the bombarding ion is studied. The experimental results show that for CN(R) both Vt and reduced etch rate, V=Vt / Vb along the trajectory of the particle depend on etching temperature. For Makrofol-E, Vt depends on etching temperature but V is independent of etching temperature. It is observed that the tracks of heavy ions etch faster. Using theoretical equations and with the help of computer the energy-loss, dE/dx US Vt curves are drawn for different etching temperatures. The dependence of "Sensitivity" [(V-I) VS Z] of the detectors on etching temperature is also shown. It is evident from these figures that the sensitivity of CN(R) depends strongly on etching temperature while that of Makrofol E is independent of etching temperature.

Keywords: Solid state nuclear track detector, bulk and track etch rate, activation energy, energyloss, response curve, sensitivity.

S. M. Farid. Dependence of Sensitivity of Different Plastic Track Detectors on Etching Temperature. Med J Islamic World Acad Sci. 1989; 2(2): 139-146

Corresponding Author: S. M. Farid, Sudan

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