Observation of the Efimov state of the helium trimer

[摘要] We report experimental observation of the long predicted but experimentally elusive Efimov state of4He trimer by means of Coulomb explosion imaging. We show spatial images of an Efimov state, confirming the predicted size and a typical structure where two atoms are close to each other while the third is far away.

[发布机构] Institut für Kernphysik, Goethe-Universität Frankfurt Am Main, Max-von-Laue-Str. 1, Frankfurt/M; 60438, Germany^1;Department of Molecular Physics, Fritz-Haber-Institut, Faradayweg 4-6, Berlin; 14195, Germany^2;Department of Physics and Astronomy, Washington State University, Pullman; WA; 99164-2814, United States^3

[关键词] Coulomb explosion imaging;Efimov state;Helium trimer;Spatial images;Typical structures