μSR Studies of 2-propanone and aqueous solutions of 2-propanone |
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| Authors: | A Hill S F J Cox R De Renzi C Bucci A Vecli M C R Symons |
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| Institution: | (1) CERN, Geneva, Switzerland;(2) Rutherford Appleton Lab, Oxfordshire, England;(3) Physics Dept., Parma University, Italy;(4) Chemistry Dept., Leicester University, England |
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| Abstract: | The radical (CH3)2 COMu has been studied in pure (CH3)2 CO and in binary aqueous systems. The value of the muon-electron hyperfine coupling constant fell sharply from 25.4 MHz to ca 22.5 MHz on the addition of low concentration of water. It then fell gradually on going to dilute solutions in water. The coupling increased with increasing temperature as expected for a positive hyperfine interaction. The results are compared with esr data for (CH3)2 COH radicals, and the solvent dependence is considered in terms of hydrogen-bonding. The mechanism of formation of these radicals is discussed in the light of reaction rates. It is concluded that their precursor cannot be muonium. |
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