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Published online by Cambridge University Press: 14 August 2015
The dust production rates of comets on various orbits with perihelia between 0.1 and 0.5 a.u. and semimajor axes between 5 and 40 a.u. are calculated. A new model is used taking into account the screening of solar radiation by the dust and the multiple scattering of the photons. Screening and multiple scattering effects tend to compensate each other over a range of moderate optical thicknesses.