Abstract
Water content and sediment density were measure rapidly and nondestructively at 2·5-cm intervals along a 75-cm long unextruded core (10·75 cm i.d.) using attenuation measurements of collimated gamma rays (0·66 MeV) and collimated fast neutrons (fission spectrum). The gamma source was 10 mCi 137Cs, and the fast neutron source was ∼93 mCi(∼ 70 μg) 252Cf. Nondestructively determined sediment densities and water contents compared well with destructively determined values (mean difference = 0·01 g/cm 3).
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