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1
Content available remote Multi-molecule imaging and inter-molecular imaging in nuclear medicine
Shimazoe Kenji, Uenomachi Mizuki
Bio-Algorithms and Med-Systems
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2022
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Vol. 18, no. 1
127--134
EN
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.
2
Content available Hyperfine interactions in Tb0.27-xYxDy0.73Fe2 compounds at 295 K
Krawczyk A., Zwoźniak A., Guzdek P., Stoch P., Zachariasz P., Suwalski J., Pszczoła J.
Nukleonika
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2013
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Vol. 58, No. 1
133-135
EN
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.
3
Content available Hyperfine interactions in Dy(Co0.4-xNixFe0.6)2 compounds at 295 K
Zwoźniak A., Krawczyk A., Stoch P., Guzdek P., Zachariasz P., Suwalski J., Pszczoła J.
Nukleonika
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2013
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Vol. 58, No. 1
179-181
EN
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.
4
Content available remote Mössbauer studies of Bi5Ti3FeO15 electroceramic prepared by mechanical activation
Mazurek M., Jartych E., Oleszak D.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 9b
256-258
EN
The present work involves the structure analysis and the determination of hyperfine interactions parameters of multiferroic Bi5Ti3FeO15 electroceramic, prepared by high-energy ball milling of polycrystalline precursors (mixture of the Bi2O3, TiO2 and Fe2O3 simple oxides). This analysis was performed by X-ray diffraction and Mössbauer spectroscopy.
PL
W pracy przedstawiono wyniki badań dla multiferroicznej elektroceramiki Bi5Ti3FeO15 otrzymanej podczas procesu aktywacji mechanicznej (mielenie wysokoenergetyczne polikrystalicznych proszków Bi2O3, TiO2 i Fe2O3). Badania struktury i oddziaływań nadsubtelnych przeprowadzono metodami dyfrakcji promieniowania X oraz spektroskopii efektu Mössbauera.
5
Content available remote Hyperfine interactions in multiferroic mechanically activated BiFeO3 compound
Jartych E., Oleszak D., Mazurek M.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 9b
242-244
EN
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.
PL
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.
6
Content available Hyperfine interactions in Ho(Fe1-xCox)2 compounds at 295 K
Bednarski M., Stoch P., Bodnar W., Zachariasz P., Pszczoła J., Suwalski J.
Nukleonika
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2010
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Vol. 55, No. 3
279-284
EN
Synthesis of Ho(Fe1–xCox)2 intermetallic compounds, studies of their crystal structure and 57Fe Mössbauer effect analysis were carried out at 295 K. X-ray measurements evidence a pure cubic Fd3m, C15, MgCu2-type Laves phase. The unit cell parameter decreases non-linearly with composition parameter x. Mössbauer effect spectra for the Ho(Fe1–xCox)2 series were composed of a number of locally originated subspectra due to random Fe/Co nearest neighbourhoods. Hyperfine interaction parameters, i.e. isomer shift, the magnetic hyperfine field and a quadrupole interaction parameter were determined from the fitting procedure of the spectra, for both the individual nearest neighbourhoods, and for the sample as bulk. As a consequence of Fe/Co substitution a Slater-Pauling type curve for the average magnetic hyperfine field vs. x is observed. The correlation between the local magnetic hyperfine fields and the average magnetic hyperfine fields is related to weak and strong ferromagnetism of the transition metal sublattice.
7
Content available Hyperfine interactions in Tb0.27Dy0.73(Fe1–xCox)2 compounds at 77 K
Bodnar W., Szklarska-Łukasik M., Stoch P., Zachariasz P., Pszczoła J., Suwalski J.
Nukleonika
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2009
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Vol. 54, No. 4
227-232
EN
The synthesis of materials, crystal structure and 57Fe Mössbauer effect studies at 77 K were performed for intermetallics Tb0.27Dy0.73(Fe1–xCox)2. The starting compound Tb0.27Dy0.73Fe2 of this Fe/Co substituted series is known as Terfenol-D. XRD measurements evidence a pure cubic Laves phase C15, MgCu2-type. The determined unit cell parameter decreases across the series. Co substitution introduces a local area, in the subnanoscale, with random Fe/Co neighbourhoods of the 57Fe atoms. Mössbauer effect spectra for the Tb0.27Dy0.73(Fe1–xCox)2 series collected at 77 K consist of a number of locally originated subspectra due to random composition of Fe and Co atoms in the nearest neighbourhood. Hyperfine interaction parameters: isomer shift, magnetic hyperfine field and a quadrupole interaction parameter were obtained from the fitting procedure of the spectra, both for the local area and for the sample as bulk. As a result of Fe/Co substitution, a Slater-Pauling type curve for the average magnetic hyperfine field vs. Co content in the Tb0.27Dy0.73(Fe1–xCox)2 series is observed. It is found that the magnetic hyperfine fields corresponding to the local area sorted out against Co contribution in the Fe/Co neighbourhoods also create a dependence similar to the Slater-Pauling type curve.
8
Content available Mössbauer effect studies of Dy(Fe0.4-xNixCo0.6)2
Jabłońska A., Suwalski J., Stoch P., Pszczoła J., Guzdek P., Szamański P., Pańta A.
Nukleonika
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2007
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Vol. 52, supl. 1
55-58
EN
A consequence of the Fe/Ni substitution in the Dy(Fe0.4Co0.6)2 compound was studied in the present paper. For this purpose the synthesis and X-ray analysis (295 K) of the Dy(Fe0.4 xNixCo0.6)2 series were performed. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. 57Fe Mössbauer effect spectra for the series were collected at 77 K. The obtained crystallographic data and the hyperfine interaction parameters are presented. The magnetic hyperfine fields form a separate branch of the Slater-Pauling curve known for the Dy(Mn1 xFex)2 and Dy(Fe1 xCox)2 series. The data are qualitatively related to the Stoner model.
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