[en] The spectra of alpha particles emitted in (n,α) reactions induced by 14 and 18 MeV neutrons on adjacent target nuclei, one with the magic neutron shell (82 neutrons) and the other near magic (83 neutrons) with one neutron outside the shell, are measured and compared. The nuclei investigated are Nd-142 and Nd-143. The weak population of low energy levels in the residual nucleus from the near magic target nucleus (Nd-143) and the strong excitation of low energy levels in the residual nucleus from neighbour magic target (Nd-142) convincingly prove that the unpaired neutron outside the magic shell acts as a spectator in the process
Source
Young, P.G.; Brown, R.E.; Auchampaugh, G.F.; Lisowski, P.W.; Stewart, L; p. 943-945; ISBN 0-677-21330-1; 
; 1985; p. 943-945; Gordon and Breach; New York, NY (USA); International conference on nuclear data for basic and applied science; Santa Fe, NM (USA); 13-17 May 1985
; 1985; p. 943-945; Gordon and Breach; New York, NY (USA); International conference on nuclear data for basic and applied science; Santa Fe, NM (USA); 13-17 May 1985