TDPAC measurements in textured hcp samples |
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Authors: | R Govindaraj K P Gopinathan |
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Institution: | (1) Materials Science Division, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India;(2) Department of Physics, Cochin University of Science and Technology, 682 022 Cochin, India |
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Abstract: | Time differential perturbed angular correlation measurements done on the 482 keV level of181Ta probe nuclei in well annealed reference foil samples ofα-ZrHf,α-TiHf andα-Hf indicate that all probe nuclei are defect free, substitutional and experience quadrupole frequencies characteristic of
these matrices. But mostly the ratio of the intensities of the harmonic components of the quadrupole frequency is never in
3:2:1, which is understood to be due to the selective orientation of microcrystallites brought out by the pre thermo-mechanical
treatments on the sample. This paper illustrates as to how texturing in general could cause ambiguities in the measurements
of the hyperfine interaction parameters of probe nuclei particularly in hcp foil samples with or without the association of
any defects and the ways to delineate the effect of texturing. |
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Keywords: | TDPAC electric field gradient texturing |
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