Positronium interactions with Cu(II) Ions in water |
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| Authors: | P. De Natale A. Dupasquier A. L. Fantola-Lazzarini E. Lazzarini A. Rolando |
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| Affiliation: | (1) Istituto di Fisica del Politecnico, Piazza L. Da Vinci 32, 20133 Milano, Italia;(2) Istituto di Ingegneria Nucleare del Politecnico, Via Ponzio, 20133 Milano, Italia |
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| Abstract: | Summary Positronium reactions with Cu(II) ions in aqueous solution were investigated by measuring the concentration dependence of lifetime spectra and of 1D-ACAR curves for the following Cu (II) complexes: [Cu(H2O)6[2+, [Cu(NH3)4 (H2O)2]2+ and [Cu(EDTA)(H2O)]2−. The combined analysis of lifetime and ACAR data shows that Cu(II) ions:a) reduce the formation of positronium (inhibition effect),b) promote both ortho ⇌ para conversion and redox reactions. It was also found that inhibition and reaction rate constants are affected by the ligand type. |
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| Keywords: | Positron states |
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