Observation of slow-pion production in nucleus-nucleus interactions
Dubinina A. I. , Kolganova E. D., Pozharova E. A., Smirnitskii V. A.
The production of slow 77 ± mesons in nucleus-nucleus interactions has been observed in a nuclear emulsion. The spectrum has the typical evaporation shape, with a temperature T~ 3.5 + 0.4 MeV and a threshold V~ 0.2 + 0.3 MeV, at pion energies up to 13 MeV. Most of the pion production occurs in central collisions.