Author :
Agnello, M. ; Bressani, T. ; D´Isep, F. ; Calvo, D. ; Costa, Sandra ; Feliciello, A. ; Gianotti, P. ; Iazzi, F. ; Marcello, S. ; Minetti, B. ; Rizzini, E. Lodi ; Venturelli, L. ; Margagliotti, G. ; Pauli, G. ; Tessaro, S. ; Masoni, A. ; Serci, S. ; Puddu,
Abstract :
The operating performances of a low-momentum (<270-MeV/c) n beam are reported. The n beam is obtained by the charge exchange reaction pp to nn at 0 degrees on a liquid hydrogen target. The n beam is used for the study of n-p annihilations with the OBELIX spectrometer. The momentum of each annihilating n is measured with a precision of 3%. The total rate of n s is 3*10/sup -5/ per incident p at 300 MeV/c.<>
