• MEHRAN TAHERI

      Articles written in Pramana – Journal of Physics

    • Design and calibration of a passive detector for separating neutron, proton and α-particles in mixed radiation fields

      FARBOD BAHRAMI SAMANEH BARADARAN MEHRAN TAHERI FEREIDOUN MIANJI

      More Details Abstract Fulltext PDF

      In this study, a new detector is designed based on CR-39, and separately calibrated for protons, neutrons and $\alpha$-particles under the same etching condition. To that end, an americium–beryllium standard source ($^{241}$Am–Be) and a plexiglass phantom for neutron irradiation, brass collimators and an americium standard source ($^{241}\rm{Am}$) for alpha irradiation, as well as a Van de Graaff accelerator for proton irradiation were employed. Sodium hydroxide solution of 6.25 N at $85^{\circ}\rm{C}$ was also used for CR-39 chemical etching. Considering the detection principle of the device, different filters were designed to help distinguish between fast neutron particles, thermal neutrons, albedo neutrons, protons and $\alpha$-particles in mixed radiation fields. Moreover, both the contribution of each particle and the ability of the designed detector to discriminate energy of charged particles were quantified.

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