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The 104,105Cd nuclei have been investigated in the 102Pd( alpha ,2n gamma )104Cd, 102Pd( alpha ,n gamma )105Cd and 104Pd( alpha ,3n gamma )105Cd reactions. The proposed level schemes including states up to 4817.7 keV and 3342.9 keV for 104Cd and 105Cd respectively are based on results obtained from direct and delayed gamma -ray spectra, excitation functions gamma - gamma coincidences and gamma -ray angular distributions. Intense E2 cascades have been observed in the nucleus 104Cd. Decoupled bands built on the nu h11/2 and on nu g7/2 are populated in 105Cd.

Levels of106Cd, populated by104Pd(α, 2nγ)106Cd have been studied measuring direct and delayedγ-ray spectra,γ-γ coincidences andγ-ray angular distributions. A decay level scheme is proposed including states up to 4659.8 keV. IntenseE2 transition cascades have been observed. The half-life of an isomeric level located at 4659.8 keV has been measured:T1/2= 62±6ns.

It is shown that the Monte-Carlo method can be applied to the study of the diffusion of sputtered particles in a hollow-cathode lamp. It is found that the difference between the `Doppler temperatures' of the spectra of the particles and the carrier gas is due to the high ejection speed of the atoms drawn from the cathode. This ejection speed, as also the concentrations and the speeds of the particles during their diffusion in the cathode region, are calculated.

International audience; A digital correlator giving the autocorrelation or the inter-correlation function of two signais X(t) and Y(t) in true time is used. The incrementai delay is adjustable between 100 ns and 1 s, by 100-ns steps.