Buckman, S. J.Gilbert, S. J.Marler, J. P.Sullivan, J. P.Surko, C. M.2004-12-032004-12-0320012001http://hdl.handle.net/2003/78510.17877/DE290R-10690enThe American Physical SocietyPhysical Review Letters530Excitation of Electronic States of Ar, H2, and N2 by Positron Impact10.1103/PhysRevLett.87.073201article (journal)