التفاصيل البيبلوغرافية
| العنوان: |
Behavior of Heptavalent Technetium in Sulfuric Acid under α-Irradiation: Structural Determination of Technetium Sulfate Complexes by X-ray Absorption Spectroscopy and First Principles Calculations. |
| المؤلفون: |
Denden, I.1, Poineau, F.1, Schlegel, M. L.1, Roques, J.1, Solari, P. Lorenzo1, Blain, G.1, Czerwinski, K. R.1, Essehli, R.1, Barbet, J.1, Fattahi, M.1 |
| المصدر: |
Journal of Physical Chemistry A. Mar2014, Vol. 118 Issue 9, p1568-1575. 8p. |
| مصطلحات موضوعية: |
*TECHNETIUM compounds, *SULFURIC acid, *EXTENDED X-ray absorption fine structure, *IRRADIATION, *RADIOLYSIS, *CYCLOTRONS |
| مستخلص: |
Theeffect of α-radiolysis on the behavior of heptavalent technetiumhas been investigated in 13 and 18 M H2SO4.Irradiation experiments were performed using α-particles (4He2+, E= 68 MeV) generated bythe ARRONAX cyclotron. UV–visible and X-ray absorption finestructure spectroscopic studies indicate that Tc(VII) is reduced toTc(V) under α-irradiation. Extended X-ray absorption fine structure(EXAFS) spectroscopy measurements are consistent with the presenceof mononuclear technetium sulfate complexes. Experimental resultsand density functional calculations show the formation of [TcO(HSO4)3(H2O)(OH)]−and/or[TcO(HSO4)3(H2O)2] and[Tc(HSO4)3(SO4)(H2O)]and/or [Tc(HSO4)3(SO4)(OH)]−for 13 and 18 M H2SO4, respectively. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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