Tota l neutrino and antineutrino cross sections in the energy range 15 to 150 GeV, and the nucl éon structure functions, F2(x, ô^) and xF^^ix, Q^) in the range 0.5 to 50 (GeV/c)^ have b een measured using a data sample of 3000 neutrino and 3800 antineutrino events. The structure functions show a weak dépendance at différent x values. The neutrino detector for this experiment was the heavy Uquid bubble chamber Gargamelle filled with a 90 mol% CjHg/lO mol% CFjBr mixture. The radia-' Nowat Fermilab , USA. ^ Chercheur qualifié FNRS, Belgium. 3 Chercheur à l'IISN. Now at SLAC, USA. tion length in this mixture is 0.61 m and the hadron interaction length 1.10 m. The magnetic field was about 2T. A two-plane external muon identifier (EMI)

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The analysis of the selected fission fragment angular distribution from alpha induced fission is made by using an exact theoretical expression. Theoretical anisotropics obtained with transition state modes are compared with their corresponding experimental values. The agreement between the calculated and experimental values is very good. The values of the statistical parameter K02 are used for calculation of the inertia parameters. The results indicate an increase in the moment of inertia

Candidates for the purely leptonic process y^e"-* v^e' have been searched for in the bubble chamber Gargamelle exposed to the CERN-SPS antineutrino wide-band beam. No single e~, of energy greater than 1 GeV, was found in a total of 230000 pictures, corresponding to 7400 charged current events. TTiis leads to an upper limit for the observed cross section of oobs < 1-6 X 10~*^ (£"y/GeV) cm^ (90% CL.). Interpréta tion of this va lue in terms of the sta nda rd Weinberg-Sa la m model yields a n upper limit to the mixing pa ra meter sin^ôw < 0-39 a t 90% CL.

The non-singlet part of the nucléon structure functions measured in the range 0.5 to 50 (GeV/c)^ is compared to leading and nexttoleading order QCD prédictions. The possible contributions of higher twist and target mass effects are also évaluated.The nucléon structure functions F2{x, Q^) and jcF3(;c, Q^) measured in the Gargamelle SPS neutrino/ antineutrino experiment have been reported previous ly [1]. In this letter the observed déviations from scaling are compared to prédictions of perturbative quantum chromo dynamics (QCD) and other possible sources.Only the nonsinglet part of the structure functions is considered. Therefore the measured values of xF^ are used for ^n^j^ < JC < 0.4 and those of F2 for ' Now at Fermilab, USA. ^ Chercheur quaUfié FNRS.