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Answer to Question ♯30 [‘‘How are positrons moderated?,’’ Thomas D. Rossing, Am. J. Phys.63(12), 1065 (1995)]

 

作者: M. Weber,   K. G. Lynn,  

 

期刊: American Journal of Physics  （AIP Available online 1996）
卷期: Volume 64, issue 7  

页码: 843-843

 

ISSN:0002-9505

 

年代: 1996

 

DOI:10.1119/1.18105

 

出版商: American Association of Physics Teachers

 

关键词: POSITRON BEAMS;MODERATORS;POSITRONS;FOILS;SODIUM 22;TUNGSTEN;THERMALIZATION;0.5;20.;60.

 

数据来源: AIP

 

摘要:

The positrons from β+decaying sources loss energyat a much faster rate than they annihilate. As the energy of the positrons drops, core excitations, plasmon excitation, electron/hole pair creation, and phonon scattering are the dominant processes of further energy loss.

 

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