44 research outputs found
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LINAC-based transuranic waste characterization system
Remote-handled transuranic nuclear waste poses a particular challenge for assaying due to the high neutron and gamma ray background that emanates from the non-fissile, but highly radioactive material, contained with the waste. The utilization of a RFQ linac with a neutron flux has shown that, in principle, the differential die-away technique can reliably assay this special class of nuclear waste
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Multi-parameter on-line coal bulk analysis. Quarterly report, March 16--June 15, 1997
An on-line coal analyzer is being developed as a joint venture between the French company SODERN which specializes in the manufacturing of neutron generators and associated electronics and the John B. Long Company which specializes in coal sampling equipment. Progress this quarter is summarized under the following topical headings: Measurement layout; Detector temperature stabilization; Raw coal library; and Determination of Btu content from elemental concentrations
Performance of an inverted sputter source
An inverted sputter source manufactured locally was installed on the Demokritos Tandem for heavy ion production. The source is utilizing as an extracted beam the negative ions that are found to be back streaming towards the ionizer in a regular sputter source. The source produces in sufficient quantities a number of ion species with rather few signs of ionizer erosion. Concerning the quality of the beam, direct comparison of the transmission through the accelerator of an oxygen beam produced by the sputter source and a diode source indicates the same percentage of transmission.Pour la production d'ions lourds, nous avons construit et installé sur l'accélérateur TANDEM de NRC Demokritos, une source sputtering renversée. Avec cette source les ions négatifs qui, dans les sources sputtering normales, vont vers l'ioniseur sont utilisés comme faisceau. La source produit un nombre d'ions lourds en quantité suffisante sans érosion significative de l'ioniseur. Pour comparer la qualité du faisceau, on a transmit un faisceau d'oxygène produit par la source renversée et la source diode. Le même pourcentage de transmission à travers l'accélérateur a été observé, indiquant une qualité de faisceau similaire pour les deux sources
Performance of an inverted sputter source
An inverted sputter source manufactured locally was installed on the Demokritos Tandem for heavy ion production. The source is utilizing as an extracted beam the negative ions that are found to be back streaming towards the ionizer in a regular sputter source. The source produces in sufficient quantities a number of ion species with rather few signs of ionizer erosion. Concerning the quality of the beam, direct comparison of the transmission through the accelerator of an oxygen beam produced by the sputter source and a diode source indicates the same percentage of transmission
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Nuclear shapes from heavy ion inelastic scattering
Earlier inelastic scattering experiments at energies above the Coulomb barrier have shown that angular distributions for the ground state and strongly coupled excited states can provide an accurate determination of a number of nuclear deformation parameters. An inelastic scattering experiment of /sup 24/Mg on /sup 208/Pb indicates that indeed this is a viable technique. 8 refs., 2 figs., 2 tabs