Multiple ionization effects on the yields of HO2
/O2
/O2
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- 作者：Meesungnoen ; Jintana ; Filali-Mouhim ; Abdelali ; Ayudhya ; Nitaya Snitwongse Na ; Mankhetkorn ; Samlee ; et. al.
- 刊名：Chemical Physics Letters
- 出版年：2003
- 出版时间：August 15, 2003
- 年：2003
- 卷：377
- 期：3-4
- 页码：419-425
- 全文大小：195 K
文摘
Monte-Carlo simulations are used to investigate the effects of multiple ionization on the formation of HO2/O2− and H2O2 in the radiolysis of water by 12C6+ ions up to 
430 keV/μm, at neutral pH and 25 °C. Taking into account the double and triple ionizations of water molecules, the primary yields GHO2/O2− and GH2O2 are calculated as a function of linear energy transfer (LET). Our results quantitatively reproduce the large increase observed in GHO2/O2− at high LET. They also simultaneously predict a slight maximum in GH2O2 at 180–200 keV/μm, in excellent agreement with experiment. Under the conditions of this study, triple ionization is found to contribute only negligibly to GHO2/O2−.
/O2− and H2O2 in the radiolysis of water by 12C6+ ions up to 430 keV/μm, at neutral pH and 25 °C. Taking into account the double and triple ionizations of water molecules, the primary yields GHO2/O2− and GH2O2 are calculated as a function of linear energy transfer (LET). Our results quantitatively reproduce the large increase observed in GHO2/O2− at high LET. They also simultaneously predict a slight maximum in GH2O2 at 180–200 keV/μm, in excellent agreement with experiment. Under the conditions of this study, triple ionization is found to contribute only negligibly to GHO2/O2−.