论文信息 - Slow‐positron apparatus for surface studies

Slow‐positron apparatus for surface studies

We describe an apparatus for producing an intense low energy positron beam of well defined energy by moderating the decay positrons from a radioactive source using a clean single crystal convertor with high conversion efficiency (e≃10−3). These positrons are used as a probe to study well characterized surfaces in an ultra‐high vacuum system. The magnetically focussed beam can deliver a current on the order of 2×105 positrons/s to a target when a 300 mCi 58Co source is used. Characteristics of the apparatus are given and possible directions for future improvements are mentioned.

K. Lynn | H. Lutz

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