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Abstract:
The temperature dependencies of the specific heat and the anisotropic
magnetic susceptibility of the heavy-fermion superconductor UPd2Al3 show
distinct anomalies which can be described by a crystalline electric
field (CEF) model for Uranium with hexagonal site symmetry. We find that
a CEF-level scheme for the H-3(4) multiplet (5f2 configuration) implying
two low lying singlets surprisingly well fits the experimental results.