Ubiquitous diffraction resonances in positronium formation from   fullerenes
  Due to the dominant electron capture by positrons from the molecular wall and the spatial dephasing across the wall-width, a powerful diffraction effect universally underlies the positronium (Ps) formation from fullerenes. This results into trains of resonances in the Ps formation cross section as a function of the positron beam energy, producing uniform structures in recoil momenta in analogy with classical single-slit diffraction fringes in the configuration space. The prediction opens a hitherto unknown avenue of Ps spectroscopy with nanomaterials. 
Paul-Antoine Hervieux, Anzumaan R. Chakraborty, Himadri S. Chakraborty
physics.atm-clus physics.atom-ph