Cassidy, D. B.Cowan, T. E.Howell, R. H.Hunt, A. W.Sterne, P. A.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1883910.17877/DE290R-12295enThe American Physical SocietyPhysical Review Letters530Doppler Broadening of In-Flight Positron Annihilation Radiation due to Electron Momentum10.1103/PhysRevLett.86.5612article (journal)