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Perfil’ev, Yu. D.; Куликов, Л. А.; Byakov, V. M.; Stepanov, S. V.; Alhatib, H.; Bugaenko, L.T.

doi:10.1023/a:1025765216148

Cited by 4 publications

(3 citation statements)

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“…In Figure 1 (plot d), a spectrum is given of frozen ethanol solution containing 119m SnCl 2 . For improving the statistics, the spectrum was obtained by summing up several spectra of the same type [10] in the presence of different concentrations of CrCl 2 which had been added as an electron scavenger. The large line width values observed for both Sn 2+ and Sn 4+ are indicative of non-uniformity of the system.…”

Section: Resultsmentioning

confidence: 99%

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Effects of trapped electrons on the line shape in emission Mössbauer spectra

et al. 2006

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To explain line broadening in emission Mössbauer spectra as compared to the corresponding absorber measurements, the model of trapped electrons has been proposed. Auger electrons (emitted, e.g. after electron capture by 57 Co or after the converted isomeric transition of 119m Sn), as well as secondary electrons, may be trapped in the proximity to the nucleogenic ion. Electrons captured by lattice traps at different distances from the daughter ion induce an asymmetric distribution of quadrupole splitting in the resulting emission spectra, as shown in a few examples. This model is supported by estimates of quadrupole splitting values which may be caused by such trapped electrons located at specified distances from the nucleogenic atom.

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Section: Resultsmentioning

confidence: 99%

“…The 119m Sncontaining system (sample 4) was represented by ethanolic solutions of 119m SnCl 2 with different concentrations of CrCl 2 (added as an electron scavenger) rapidly frozen in liquid nitrogen. Other details of emission Mössbauer measurements and statistical treatment of the experimental data were described elsewhere [8][9][10][11].…”

Section: Methodsmentioning

confidence: 99%

Effects of trapped electrons on the line shape in emission Mössbauer spectra

et al. 2006

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“…Nevertheless, correlations between the yields of the above mentioned species even under somewhat different conditions are meaningful and indicate a similarity of the discussed processes in blobs. From the data on Figure 2 a dependence of the Sn 2+ yield in frozen at 77 K solutions vs concentration of salts CrCl 2 (filled triangle) and CuCl 2 (filled circle) [7]. Sn 2+ is the final product of ion-electron recombination of the 119m Sn nucleus, after its converted isomer transition.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

Investigation of primary chemical reactions of electrons by emission Mössbauer and positron spectroscopies

et al. 2006

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A set of early chemical reactions induced in frozen medium around decayed 57 Co or 119m Sn nuclei by emitted Auger electrons is suggested. The mechanism predicts a correlation between formation probabilities of final products, namely Fe 2+ -Fe 3+ or Sn 2+ -Sn 4+ ions, positronium atom and molecular hydrogen formed in similar medium after its irradiation by fast positrons and electrons. This correlation indicates a similarity of chemical processes occurring in nanovolumes around Mö ssbauer 57 Fe-and 119 Sn-nuclei after radioactive decay as well as in tracks produced by fast positrons and electrons. The important role of quasi-free electrons is revealed.Key words reaction of electrons . comparative study . emission Mö ssbauer spectroscopy . positron spectroscopy . radiolysis For application of the emission Mö ssbauer spectroscopy, a small amount of special isotopes ( 57 Co, 119m Sn) are added into investigated solid state system. A common property of these isotopes consists in production of Auger ionization of the daughter atoms ( 57 Fe, 119 Sn), caused by electron capture or converted isomeric transition. These processes precede emission of the Mö ssbauer g-quantum by Mö ssbauer 57 Fe or 119 Sn, which carries physico-chemical information about the daughter atoms and their environment. Auger ionization converts the daughter atom into multi-charge ion (electric charge of 57 Fe ion could reach +8) and is accompanied by emission of a large number of Auger electrons with total energy about several keV and average energy of the electron above 10 2 eV. Together with the X-rays, Auger electrons Hyperfine Interact (2005) 166:437-442

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