Accelerator-driven photon reference field for replacement of ¹³⁷Cs γ-ray

Photon splitting γ → νν̃ in an external magnetic field

Photon decay γ → νν̄ in an external magnetic field

Polymethylmethacrylate/Silver Nanocomposite Prepared by γ-Ray

Polymethylmethacrylate-silver (PMMA/Ag) nanocomposite is synthesized by irradiating the solution of silver ions in methylmethacrylate monomer by γ-ray. In this method, polymerization of the methylmethacrylate monomer and the silver ion reduction occurred simultaneously. Optical properties of the PMMA/Ag solutions are investigated using UV-Vis spectroscopy. The structural characterizations of th...

Measuring γ–ray dose of terrestrial samples using β-γ Spectrometry

Background: The existence of some radionuclides in soil and some building materials produce a β-γ radiation field, which in some regions the exposure of these radionuclides to human is high. Materials and Methods: The air-absorbed dose, indoor and outdoor annual effective dose of soil and some building material samples (ceramic, granite, gypsum, etc.). The samples were collected from 3...

Determination of therapeutic standard field for cancer patients including the medical megavoltage accelerator jaws movement.

Introduction: Accurate calculation of equal square field size is important in radiation therapy and A factor, in the Vadash formula must be determine by considering collimator exchange effect. Therefore, the purpose of this study was to determine the best A factor, for calculation of equal square field size in treatment planning   Materials and Methods: A new...