6533b82cfe1ef96bd128e987
RESEARCH PRODUCT
Correlated e+ e− peaks observed in heavy-ion collisions
H. BackeK. BethgeJ. SchweppeK.e. StiebingT.e. CowanD. SchwalmP. SalaburaK. SakaguchiH. FolgerH. BokemeyerJ. S. Greenbergsubject
PhysicsNuclear physicsNuclear and High Energy PhysicschemistryTantalumCoulomb barrierThoriumchemistry.chemical_elementContext (language use)Heavy ionAtomic physicsBeam (structure)Line (formation)description
Abstract Three very narrow e + e − sum-energy peaks around 610, 750, and 810 keV have been observed in U+Th as well as in U+Ta collisions at beam energies around the Coulomb barrier. As no processes involving conventional atomic and nuclear physics were found to describe their origin, the data were in particular confronted with the hypothesis that the lines are due to the two-body decay of neutral objects in an e + e + pair. Although the 810 keV sum-energy line observed in U+Th is consistent with the prompt two-body e + e − decay of a neutral object if created nearly at rest in the heavy-ion center-of-mass system, the other lines require at least a considerably more complicated scenario if they are to be explained in the context of a two-body decay.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-08-01 | Physics Letters B |