Publications [#247359] of Berndt Mueller

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Papers Published
  1. Reus, TD; Müller-Nchler, U; Soff, G; Graf, O; Müller, B; Greiner, W, Can multiple structures in positron spectra be caused by atomic effects?, Zeitschrift für Physik D-Atoms Molecules and Clusters, vol. 8 no. 4 (1988), pp. 305-313 [doi] .

    Abstract:
    In recent experiments at least two structures have been detected in positron spectra from subcritical (total charge Z ≦ 174) heavy-ion collisions at bombarding energies ELab=5.7-5.9 MeV/n. The origin of these structures is unexplained up to now. Atomic effects have already been discussed as a possible source in a previous paper, where a schematic ansatz for the electronic transition matrix elements was employed. Meanwhile numerical calculations for K-vacancy formation also exhibited oscillations in the impact parameter dependence when using this ansatz. In this paper we report on a scaling law describing these oscillations. As a consequence certain subsidiary conditions have to be imposed on our schematic ansatz, which in turn yield a new understanding on eligible atomic sources for multiple structures in the emission spectra of positrons. © 1988 Springer-Verlag.