PAC studies of hyperfine interactions of181Ta in YBa2Cu3O7-δ and of140Ce in La2CuO4 and La1.85Sr0.15CuO4 |
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| Authors: | Z Z Akselrod G A Denisenko B A Komissarova L N Kryukova G K Ryasny A A Sorokin L G Shpin’kova |
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| Institution: | (1) Institute of Nuclear Physics, Moscow State University, 117234 Moscow, USSR;(2) Institute of Crystallography, Academy of Sciences of the USSR, Leninskii Pr. 59, 117333 Moscow, USSR |
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| Abstract: | Results of TDPAC studies of hyperfine interaction in high temperature superconducting ceramics are reported. The γ-ray cascade
of 329–487 keV in140Ce excited in the decay of140La in La2-xSrxCuO4 samples (x=0 and 0.15), and 133–482 keV cascade in181Ta excited in the decay of181Hf in YBa2Cu3O7-δ samples were used. The procedure of introducing radioactive181Hf into the ceramics is described and indirect evidence for the occupation of Cu sites by the181Hf-181Ta probe is presented. |
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