Observation of Positron Creation in Superheavy Ion-Atom Collision Systems
作者： H. Backe , L. Handschug , F. Hessberger , E. Kankeleit , L. Richter
DOI: 10.1103/PHYSREVLETT.40.1443
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摘要: We report the first observation of positron creation in high-energy $^{208}\mathrm{Pb}$ + collisions and establish that a dominant fraction yield is from nonnuclear origins. The excess intensity observed over nuclear emission its projectile energy dependence consistent with recent predictions for pair-creation processes strong time-varying electric fields produced by combined charges quasimolecular system formed collision.
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