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  • 1 University of Patras Radiochemistry Laboratory Patras (Greece)
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The oscillatory isothermal behaviour of three cobalt(III) compounds, trans- and cis[Co(en)2Cl2]NO3 and [Co(en)3] (NO3)3, irradiated by neutrons in the crystalline state, appears to be different depending on structural and electrostatic parameters. The temperature coefficient of frequency in the trans and cis compounds is negative, while that of the amplitude is positive. Both temperature coefficients are the opposite in case of the trisethylenediamine compound. The oscillatory isotope exchange, responsible for these phenomena, is mechanistically approached by applying a modified Lotka-Volterra model to the radiation damaged state in the frame of non-equilibrium thermodynamics.