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Report No.
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Positronium formation in fused quartz; Experimental evidence of delayed formation

Komuro, Yo; Hirade, Tetsuya ; Suzuki, Ryoichi*; Odaira, Toshiyuki*; Muramatsu, Makoto*

Recently, positronium (Ps) formation mechanism in the spur is becoming clarified. Blob model, the modified Spur model, proposed by Stepanov can give information of Ps formation time. Dauwe et al. showed that S(t) curve of PMMA observed by AMOC measurement could be fitted by the blob model. The young-age broadening was found and explained with the delayed slowing down of Ps by Stuttgart group. The delayed Ps formation was shown by Suzuki et al. especially at low temperatures, because positrons can diffuse long distance to find trapped electrons. According to the blob model, Ps formation even after long diffusion of positrons might be possible even at the room temperature. Now we are trying to obtain the experimental evidence of delayed Ps formation in spur process.

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Category:Chemistry, Physical

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