화학공학소재연구정보센터
Applied Surface Science, Vol.255, No.1, 217-219, 2008
Spontaneous emission of positronium negative ions from polycrystalline tungsten surfaces
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. (c) 2008 Elsevier B.V. All rights reserved.