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The neutron cross sections of the fifteen rare earth elements (excepting ₆₁Pm) have been measured in the energy range from 0.07 to {~}20 ev with a crystal spectrometer. The resonances found are summarized in a table giving the resonant energies, E₀, and a qualitative value of the strength, σ₀Γ². For some cases, the isotope responsible for the resonance has been identified and is also listed.
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Sailor et al. (1954) studied this question.
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