161 research outputs found

    Delta excitation in K^+-nucleus collisions

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    We present calculations for \Delta excitation in the (K^+,K^+) reaction in nuclei. The background from quasielastic K^+ scattering in the \Delta region is also evaluated and shown to be quite small in some kinematical regions, so as to allow for a clean identification of the \Delta excitation strength. Nuclear effects tied to the \Delta renormalization in the nucleus are considered and the reaction is shown to provide new elements to enrich our knowledge of the \Delta properties in a nuclear medium.Comment: 11 pages, 6 figures, LaTe

    Heterogeneous Structures In The Systems B2O3–MoO3–Coo and B203–Mo03–Fe2O3

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    Glass-Ceramics In The Systems La-Pb-Mn-B-O And La-Pb-Mn-Te-O

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    ABSTRACTCompositions from the systems Pb-Mn-B-O and Pb-Mn-Te-0 are used to synthesize glass-ceramics obtained by solid state reactions and from supercooled melts. By casting on a metal plate or by quenching with the aid of twin rollers the melts are cooling. The glass-crystalline materials are obtained after heating glasses from the combination of PbO-MnO-B203 and PbO-MnO-TeO2 with the addition of La203 from 10 to 50 wt.% and the formation of the crystalline phases is determined.</jats:p
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