Durr, MDorn, AlexanderUllrich, JoachimCao, S.PCzasch, A OKheifets, AnatoliGotz, J.RBriggs, J.S2009-08-252010-12-202009-08-252010-12-20Physical Review Letters 98.19 (2007): 193201/1-40031-90071079-7114http://hdl.handle.net/10440/758http://digitalcollections.anu.edu.au/handle/10440/758Double ionization of the helium atom by slow electron impact (E0=106  eV) is studied in a kinematically complete experiment. Because of a low excess energy Eexc=27  eV above the double ionization threshold, a strongly correlated three-electron continuum is realized. This is demonstrated by measuring and calculating the fully differential cross sections for equal energy sharing of the final-state electrons. While the electron emission is dominated by a strong Coulomb repulsion, also signatures of more complex dynamics of the full four-body system are identified.4 pageshttp://www.sherpa.ac.uk/romeo/index.php "Author can archive pre-print (ie pre-refereeing) … post-print (ie final draft post-refereeing) … [and] publisher's version/PDF. Link to publisher version … [and] Copyright notice required. Publisher's version/PDF can be used on … employers web site." - from SHERPA/RoMEO site (as at 25/02/10). ©2007 The American Physical SocietyKeywords: Coulomb blockade; Electron beams; Helium; Ionization; Double ionization; Helium atom; Three-electron continuum; Atomic physics2007-05-1110.1103/PhysRevLett.98.1932012015-12-08