Abstract
The connection between single and double electron removal and the fragmentation yields of water by heavy ions is analyzed. The contribution from the Auger-like decay of vacancies in the 2a1 molecular orbital to the asymptotic branching ratios for water fragmentation by fast particles is obtained. A model assuming the independence of double and single electron removal due to collisional processes is proposed, from which double electron removal cross sections can be obtained from the fragmentation pattern obtained in single coincidence experiments. The proposed scheme helps in the comparison between theoretical calculations for electron removal from ionization, electron capture and electron loss and the observed fragmentation pattern of water.
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