Spontaneous emission of positronium negative ions from polycrystalline tungsten surfaces |
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| Authors: | Yasuyuki Nagashima Toshihide Hakodate Takahiko Sakai |
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| Affiliation: | Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan |
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| Abstract: | Recently, the spontaneous emission of positronium negative ions from polycrystalline tungsten surfaces was observed. In the present work, the emission of these ions in ultra-high vacuum has been studied and the long-term stability of the emission efficiency has been investigated. |
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| Keywords: | 36.10.Dr 71.60.+z 78.70.Bj |
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