Induced radioactivity analyser - moving sample from isotope to detector at two different speeds

An analyser for the compsn. of samples, based on measuring the induced radioactivity by radiation with a radio-isotope includes a horizontal arm for the sample which is revolved to pass from under the radiation source to under the detector. The measurement is carried out at two different speeds. One is adjusted to reduce the effect of the isotope to practically zero, and one is such that the activation effect is present. This system eliminates any falsification of the readings by the interference radiation of any isotopes which are present in the sample but are not to be determined at the time. L'INVENTION CONCERNE LES TECHNIQUES D'EXAMEN DE LA COMPOSITION QUANTITATIVE ET QUALITATIVE DES MATIERES.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST DU TYPE CONSISTANT A IRRADIER L'ECHANTILLON PAR DES PARTICULES RADIO-ACTIVES, ET EST CARACTERISE NOTAMMENT EN CE QU'ON EFFECTUE AUSSI L'IRRADIATION DE L'ECHANTILLON DE SUBSTANCES SE TROUVANT DANS LE RECIPIENT 13 AU COURS DE SA ROTATION, ET QU'ON REALISE CETTE IRRADIATION A AU MOINS DEUX VITESSES DE ROTATION DE L'ECHANTILLON, L'UNE DE CES VITESSES ETANT CHOISIE DE FACON A ASSURER UN EFFET D'ACTIVATION DU A L'ISOTOPE DE LA SUBSTANCE A DETERMINER, TANDIS QUE LES AUTRES VITESSES SONT CHOISIES DE MANIERE QUE CET EFFET DU A L'ISOTOPE DE LA SUBSTANCE A DETERMINER SOIT PRATIQUEMENT ABSENT.L'INVENTION TROUVE DES APPLICATIONS PARTICULIEREMENT AVANTAGEUSES DANS LES INDUSTRIES MINIERE ET CHIMIQUE.