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Hyperfine interactions in Dy(Co0.4-xNixFe0.6)2 compounds at 295 K

100%

Zwoźniak A. , Krawczyk A. , Stoch P. , Guzdek P. , Zachariasz P. , Suwalski J. , Pszczoła J.

2013

tom Vol. 58, No. 1

179-181

57Fe Mössbauer effect studies were performed for the cubic C15, Fd3m, MgCu2-type Dy(Co0.4-xNixFe0.6)2 intermetallics. Hyperfine interaction parameters : isomer shift, magnetic hyperfine field and quadrupole interaction parameter were obtained from the fitting procedure of the collected 57Fe Mössbauer effect spectra. As a result of Co/Ni substitution, a Slater-Pauling type curve for the average magnetic hyperfine field vs. Ni content in the Dy(Co0.4-xNixFe0.6)2 series is observed.

Hyperfine interactions in Tb0.27-xYxDy0.73Fe2 compounds at 295 K

100%

Krawczyk A. , Zwoźniak A. , Guzdek P. , Stoch P. , Zachariasz P. , Suwalski J. , Pszczoła J.

2013

tom Vol. 58, No. 1

133-135

This paper concerns the synthesis of yttrium-dilute Tb0.27-xYxDy0.73Fe2 intermetallic series with a borderline compound Tb0.27Dy0.73Fe2 known as Terfenol-D by arc melting, XRD analysis and 57Fe Mössbauer effect studies at 295 K. XRD analysis (295 K) shows that all samples crystallize in a cubic, Fd3m, MgCu2-type structure. The lattice parameter increases along with yttrium content. Mössbauer effect spectra for the Tb0.27-xYxDy0.73Fe2 series collected at 295 K consist of two subspectra due to easy direction of magnetization <111>. Hyperfine interaction parameters: isomer shift, magnetic hyperfine field and a quadrupole splitting were obtained from the fitting procedure of the spectra.

Multi-molecule imaging and inter-molecular imaging in nuclear medicine

63%

Shimazoe K. , Uenomachi M.

2022

tom Vol. 18, no. 1

127--134

Multi-molecule imaging and inter-molecular imaging are not fully implemented yet, however, can become an alternative in nuclear medicine. In this review article, we present arguments demonstrating that the advent of the Compton positron emission tomography (Compton-PET) system and the invention of the quantum chemical sensing method with double photon emission imaging (DPEI) provide realistic perspectives for visualizing inter-molecular and multi-molecule in nuclear medicine with MeV photon. In particular, the pH change of InCl3 solutions can be detected and visualized in a three-dimensional image by combining the hyperfine electric quadrupole interaction sensing and DPEI. Moreover, chemical states, such as chelating, can be detected through angular correlation sensing. We argue that multi-molecule and chemical sensing could be a realistic stream of research in future nuclear medicine.

Hyperfine interactions in multiferroic mechanically activated BiFeO3 compound

63%

Jartych E. , Oleszak D. , Mazurek M.

tom R. 88, nr 9b

242-244

In this work the results of structural and magnetic investigations for multiferroic BiFeO3 compound prepared by mechanical activation are presented. The structural analysis and hyperfine interactions investigations were performed by X-ray diffraction and Mössbauer spectroscopy, respectively.

W pracy przedstawiono wyniki badań strukturalnych i magnetycznych dla multiferroicznego związku BiFeO3 otrzymanego w procesie aktywacji mechanicznej. Badania struktury i oddziaływań nadsubtelnych przeprowadzono odpowiednio metodami dyfrakcji promieniowania X oraz spektroskopii efektu Mössbauera.