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المؤلفAl-Qaradawi, I. Y.
المؤلفColeman, P. G.
تاريخ الإتاحة2023-11-19T10:16:43Z
تاريخ النشر2002-06-21
اسم المنشورApplied Surface Science
المعرّفhttp://dx.doi.org/10.1016/S0169-4332(02)00108-3
الاقتباسAl-Qaradawi, I. Y., & Coleman, P. G. (2002). Re-emission of slow positrons from tungsten at elevated temperatures. Applied surface science, 194(1-4), 20-23.‏
الرقم المعياري الدولي للكتاب01694332
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0037150615&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/49482
الملخصA series of measurements have been made on the dependence of the intensity and energy spectrum of slow positrons re-emitted from polycrystalline tungsten foil held at temperatures of up to 500 °C. Irrespective of target history, no sharpening of the energy spectrum of re-emitted positrons was observed as the remoderator temperature was increased. Further, a steady decrease in the apparent re-emitted positron intensity was observed, attributed primarily to the increase in positronium formation, as the temperature of the foil was increased from 20 to 500 °C. It is concluded that maintaining a moderator or remoderator at elevated temperatures in standard positron beam systems has no beneficial consequences for the quality or intensity of the beam produced. Reasons for this are discussed. © 2002 Elsevier Science B.V. All rights reserved.
اللغةen
الناشرElsevier
الموضوعDiffusion
Positron moderation
Tungsten
العنوانRe-emission of slow positrons from tungsten at elevated temperatures
النوعConference
الصفحات20-23
رقم العدد1-4
رقم المجلد194
dc.accessType Abstract Only


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