Abstract
The efficiency of positron production by a 1.2-GeV electron beam incident on a tungsten single crystal oriented in an axially channeling condition has been experimentally studied. Positron yields from a 1.2-mm-thick crystal have been measured to be ∼2.5-3.0 times larger than those from amorphous targets with the same thickness. A simple model simulation of the positron production process shows that coherent bremsstrahlung, as well as channeling radiation, contributes to the enhancement of the positron yields.
Original language | English |
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Pages (from-to) | 1437-1440 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 80 |
Issue number | 7 |
DOIs | |
Publication status | Published - 16 Feb 1998 |
ASJC Scopus subject areas
- Physics and Astronomy(all)