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The radiative decay of excitons in a slightly disordered molecular chain is studied. The degree of disorder dictates the radius of the excitonic state which determines the enhancement of the decay rate Γ (superradiance). Γ is calculated as a function of the degree of disorder and the temperature and compared with that of a regular chain whose length N determines the excitonic radius. A value of N that gives essentially the same decay rate as a function of the temperature is found for every degree of disorder.

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