Thermal Evolution Process of Organic Free Radicals in .GAMMA.-Ray Irradiated Pepper Studied by Electron Spin Resonance

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Other Title
  • 加熱時における放射線照射黒胡しょう中有機フリーラジカル増加の電子スピン共鳴法による解析

Description

An increase behavior of radicals in black pepper induced by the γ-ray irradiation was analyzed using electron spin resonance (ESR) spectroscopy. A sharp signal at g = 2.0, observed in the ESR spectrum of pepper due to organic free radicals produced by γ-ray irradiation, in-creased exponentially in the early stage of heating procedure and then leveled off at a certain value. The increase behavior was analyzed following to a first order differential equation, and obtained a general solution under the restrictions of initial and boundary conditions. Based on the general solution, we carried out the functional prediction using the nonlinear least squares method, and determined a rigorous solution for the time constant of the radical increase.

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 52 (8), 374-377, 2003

    Japan Radioisotope Association

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