Positronium formation from porous silica in backscattering and transmission geometries
Positronium formation from porous silica in backscattering and transmission geometries
复制标题
反向散射和透射几何结构中多孔二氧化硅形成正电子
DOI:
10.1140/epjd/e2014-40762-x
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
U. Uggerhøj
中科院分区:
文献类型:
--
作者:
S. Andersen;Rasmus R. Johansen;Jakob B. Overgaard;Johan K. Mortensen;K. K. Andersen;H. D. Thomsen;M. Lund;J. Chevallier;H. Knudsen;U. Uggerhøj
The Aarhus positron beam line is utilised to measure the positronium formation fraction from porous silica thin films created by the Glancing Angle Deposition technique. The highest formation fraction found from these studies in a backscattering geometry is (57.7 ± 1.0)% in good agreement with other measurements. In transmission mode, the maximum positronium output is found to be (12.5 ± 0.5)%. These are the first measurements of positronium formation in transmission of a porous silica thin film, a starting point for future attempts to optimise the positronium formation in transmission.