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H$$_{6}$$$$^{+}$$, H$$_{5}$$D$$^{+}$$, H$$_{4}$$D$$_{2}$$$$^{+}$$, and H$$_{2}$$D$$_{4}$$$$^{+}$$ produced in $$gamma$$-ray irradiated solid para-H$$_{2}$$

Kumada, Takayuki   ; Kumagai, Jun*; Ushida, Takahiro*; Shimizu, Yuta*

We carried out electron spin resonance (ESR) study of irradiated solid para-H$$_{2}$$. H$$_{6}$$$$^{+}$$ lines were observed. The H$$_{6}$$$$^{+}$$ ion is the ionic hydrogen radical whose spectrum is firstly observed in irradiated solid para-H$$_{2}$$. The H$$_{6}$$$$^{+}$$ ions diffuse in solid H$$_{2}$$ via the repetition of H$$_{6}$$$$^{+}$$ + H$$_{2}$$ $$rightarrow$$ H$$_{2}$$ + H$$_{6}$$$$^{+}$$ reaction, which terminate by the isotope-exchange reaction H$$_{6}$$$$^{+}$$ + HD $$rightarrow$$ H$$_{5}$$D$$^{+}$$ + H$$_{2}$$ or H$$_{6}$$$$^{+}$$ + D$$_{2}$$ $$rightarrow$$ H$$_{4}$$D$$_{2}$$$$^{+}$$ + H$$_{2}$$. Unlike H$$_{6}$$$$^{+}$$, the isotope substitutions H$$_{5}$$D$$^{+}$$ and H$$_{4}$$D$$_{2}$$$$^{+}$$ cannot diffuse in solid para-H$$_{2}$$. Rate-determining step of their decay is charge recombination with e$$^{-}$$.

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English

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International Symposium on Charged Particle and Photon Interactions with Matter (ASR 2007)

Held date

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2007/11

Location (city)

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Tokai

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Japan

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Keywords

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no keyword

Research Facility

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第4研究棟  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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- Accesses

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