Abstract
An inelastic-neutron-scattering investigation of the dynamic magnetic susceptibility of the heavy-fermion compound CeCu 2 Si 2 is presented. We find evidence for only one crystal-field (CF) transition at 30 meV in addition to quasi-elastic-scattering implying a doublet-quartet level scheme in agreement with specific-heat results but in contradiction with two earlier neutron-scattering studies. Using other experimental results, we propose a set of CF parameters (B 2 0 =-1.29±0.06 meV, B 4 0 =(-4.3±0.2)×10 -3 meV, |B 4 4 |=0.45±0.02 meV) which describe satisfactorily all the measured properties that depend on the CF
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