Article révisé par les pairs
Résumé : The Gargamelle results on the one pion neutral current reactions ν (or ν)+N→ν(or ν)+N+π have been analyzed in order to deduce the isospin properties of the neutral current reactions. The results of this analysis are in disagreement with the hypothesis of a pure ΔI=0 transition, and are compatible with at least an important contribution from a ΔI=1 transition. © 1976.