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  • Author or Editor: D. L. Nagy x
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Abstract  

Nuclear inelastic resonant scattering of synchrotron radiation was applied to the study solutions of 57Fe complexes. In order to reveal different inelastic contributions solutions of two different 57Fe complexes of different molecular dimensions with solvents of substantially different viscosities were studied. We argue that the only former experiment available in the literature overestimates the role of the diffusivity in affecting the spectrum. The first direct observation of an intramolecular vibrational transition assisting the nuclear resonance absorption in a liquid is reported.

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Abstract  

A control system for monitoring the radioactive concentration in aqueous wastes of nuclear installations was elaborated. The mobile station developed for in situ control enables simultaneous measurement of gamma radiation in the energy range of 0.15–2.0 MeV and that of beta radiation in the energy range of 0.3–2.0 MeV by means of a combined scintillation detector. Disturbing effects of accompanying and secundary radiations on the determination of the counting efficiency vs. radiation energy functions used in calculation of the radioactive concentration limits as well as some experiences during a long time of operation of the system have been discussed.

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Abstract  

57Co Mössbauer emission spectra of undoped and Fe or Mg melt-doped LiNbO3 single crystals show substantial amounts of the nucleogenic Fe3+ charge state (*Fe3+) which was generated as an after-effect of the electron-capture of 57Co2+. The proportion of *Fe3+ is markedly dependent on the Mg content and on the stoichiometry of the sample. Electron trapping is described within the model of competing acceptors. The capabilities of the model are investigated in defect structure analysis and charge trapping studies of LiNbO3.

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