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New measurements of differential elastic and inelastic neutron scattering from 12C at En = 20.8, 22, 24 and 26 MeV are presented and analysed in terms of both spherical and deformed optical model potentials. Results of these analyses are compared with other recent differential and total cross-section measurements in order to obtain a consistent representation of the energy dependence of neutron scattering over a broad energy range. Heavy ion recoil kerma factors are calculated and compared with earlier measurements and estimates of these quantities.

Recent measurements of differential elastic and inelastic neutron scattering from oxygen, nitrogen and calcium at 18 less than En less than 26 MeV are presented and analysed in terms of the optical model. These data, together with earlier measurements of scattering and total cross sections, are used to construct model potentials that may be used to calculate various quantities of interest in neutron dosimetry in an energy region (20-60 MeV) where very few cross section data are available. The heavy-ion-recoil contribution to kerma is obtained directly from the data at each energy. The value of proton inelastic scattering data for validating potential models at high energy is discussed.

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