Störmer, J.; Goodyear, A.; Anwand, Wolfgang; Brauer, Gerhard; Coleman, P. G.; Triftshäuser, Werner
Document type:
Zeitschriftenartikel / Journal Article
Title:
Silicon carbide
Subtitle:
A new positron moderator
Journal:
Journal of Physics. Condensed Matter
Volume:
8
Issue:
7
Year:
1996
Pages from - to:
L89-L94
Language:
Englisch
Abstract:
Observation of copious positron re-emission from crystalline 6H-SiC, with no pretreatment and without the need for ultra-high-vacuum conditions, suggests that this material may form the basis of an important new moderator for the production of monoenergetic positrons. Its positron work function is measured to be -3.0 ± 0.2 eV. Its electrical characteristics point to SiC as a prime candidate for development as a field-assisted positron moderator, producing moderately intense slow-positron beams in laboratory-based systems and enabling a new generation of positron experimentation. «
Observation of copious positron re-emission from crystalline 6H-SiC, with no pretreatment and without the need for ultra-high-vacuum conditions, suggests that this material may form the basis of an important new moderator for the production of monoenergetic positrons. Its positron work function is measured to be -3.0 ± 0.2 eV. Its electrical characteristics point to SiC as a prime candidate for development as a field-assisted positron moderator, producing moderately intense slow-positron beams i... »