A method of measuring the close to threshold meson production in neutron-neutron collisions is described where the momenta of the colliding neutrons can be determined with the accuracy obtainable for the proton-proton reaction. The technique is based on the double quasi-free nn->nnX0 reaction, where deuterons are used as a source of neutrons.
Preprint: FZJ-IKP(I)-2001-1 in
Publication: Phys.Lett. B 517 (2001) 295-298