Abstract
The dependence of the electric field gradients (EFG) in Hafnium-Hydride systems as a function of the composition H/Hf in the cubic δ and tetragonal ε phases were investigated using the time-dependent perturbed angular correlation (TDPAC) technique, with181Ta as the nuclear probe. Two EFGs were found in the ε phase, indicating the existence of two major symmetries surrounding the Ta probe. The results indicate that the trend of the EFGs, in the ε phase, are due to the changes in the lattice parametersa o,c o as hydrogen is added to the Hf-H system. In the δ phase, only one major symmetry was found. Both phases are characterized by broad frequency distributions and large anisotropies.
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Berant, Z., Levitin, Y., Kahane, S. et al. Time differential perturbed angular correlation studies of hafnium hydrides. Hyperfine Interact 52, 383–397 (1990). https://doi.org/10.1007/BF02395662
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DOI: https://doi.org/10.1007/BF02395662