Narrow positron lines from U-U and U-Th collisions
Date
1984Author
Clemente, M.Berdermann, E.
Kienle, P.
Tsertos, Haralambos
Wagner, W.
Kozhuharov, C.
Bosch, F.
Koenig, W.
Source
Physics Letters BVolume
137Issue
1-2Pages
41-46Google Scholar check
Metadata
Show full item recordAbstract
Spectra of positrons emitted in heavy-ion-atom collisions close to the Coulomb barrier were measured. The data exhibit broad energy distributions according to expectations for induced positron creation by the strong time-changing Coulomb field. For the heavy systems U+U and U+Th superimposed narrow lines at 300 keV positron energy were observed. Possible sources for this unexpected line - such as nuclear excitations or spontaneous positron emission enhanced by a prolonged nuclear reaction time - are discussed. © 1984.