Browsing by Author "Bosch, F."

Now showing items 1-9 of 9

    • Article  

      Investigations of correlated ρ+ e- emission in heavy-ion collisions near the Coulomb barrier 

      Koenig, I.; Berdermann, E.; Bosch, F.; Kienle, P.; Koenig, W.; Kozhuharov, C.; Schröter, A.; Tsertos, Haralambos (1993)
      We present the results obtained from a series of ρ+ρ--coincidence measurements in heavy-ion collisions using the double-Orange β-spectrometer at GSI. The collision systems U+U, U+Pb, and U+Ta were investigated at bombarding ...
    • Article  

      Monoenergetic (e+e-) pairs from heavy ion collisions 

      Berdemann, E.; Bosch, F.; Kienle, P.; Koenig, W.; Kozhuharov, C.; Tsertos, Haralambos; Schuhbeck, S.; Huchler, S.; Kemmer, J.; Schröter, A. (1988)
      Energy and angular correlations of (e+e-) pairs emitted in HI collisions were investigated. Some evidence is found for a weak peak at 815±5keV in the (e+e-) sum-energy spectrum obtained for θe+c- = 180° ± 18° (FWHM). The ...
    • Article  

      Multiple positron structures observed from U-U collisions at 5.6 MeV/u and 5.9 MeV/u 

      Tsertos, Haralambos; Bosch, F.; Kienle, P.; Koenig, W.; Kozhuharov, C.; Berdermann, E.; Huchler, S.; Wagner, W. (1987)
      High resolution positron spectroscopy in U-U collisions at bombarding energies of 5.6 MeV/u, the lowest energy studied until now as well as of 5.9 MeV/u, reveals similar multiple structures between 220 keV and 385 keV ...
    • Article  

      Narrow positron lines from U-U and U-Th collisions 

      Clemente, M.; Berdermann, E.; Kienle, P.; Tsertos, Haralambos; Wagner, W.; Kozhuharov, C.; Bosch, F.; Koenig, W. (1984)
      Spectra of positrons emitted in heavy-ion-atom collisions close to the Coulomb barrier were measured. The data exhibit broad energy distributions according to expectations for induced positron creation by the strong ...
    • Article  

      On the momentum correlation of (e+e-) pairs observed in U + U and U + Pb collisions 

      Koenig, W.; Berdermann, E.; Bosch, F.; Huchler, S.; Kienle, P.; Kozhuharov, C.; Schröter, A.; Schuhbeck, S.; Tsertos, Haralambos (1989)
      First results on the energy and angular dependence of the (e+e-) pairs, emitted from U + U and U + Pb collisions at a beam energy of 5.9 MeV/u, are presented. The (e+e-) coincidence measurements were carried out utilizing ...
    • Article  

      On the production mechanism of the narrow positron lines observed in heavy-ion collisions 

      Tsertos, Haralambos; Bosch, F.; Kienle, P.; Koenig, W.; Kozhuharov, C.; Berdermann, E.; Clemente, M.; Wagner, W. (1987)
      Following a suggestion of Bang et al. we deduce that the total energy transfer associated with the narrow positron lines observed in heavy-ion collisions is given approximately by the sum of the rest masses of the positron ...
    • Article  

      On the scattering-angle dependence of the monochromatic positron emission from U + U and U + Th collisions 

      Tsertos, Haralambos; Berdermann, E.; Bosch, F.; Clemente, M.; Kienle, P.; Koenig, W.; Kozhuharov, C.; Wagner, W. (1985)
      The narrow positron lines emitted in U + Th and U + U collisions were investigated with respect to their dependence on the heavy-ion scattering angle Θp. For U + U collisions also the excitation function was measured which ...
    • Article  

      Positron lines from subcritical heavy ion-atom collisions 

      Koenig, W.; Bosch, F.; Kienle, P.; Kozhuharov, C.; Tsertos, Haralambos; Berdermann, E.; Huchler, S.; Wagner, W. (1987)
      Positron lines were observed in heavy ion-atom collisions at bombarding energies close to the Coulomb barrier in subcritical systems with the sum of the atomic numbers of the colliding nuclei Zu=Z1+Z2 being smaller than ...
    • Article  

      Systematic studies of positron production in heavy-ion collisions near the Coulomb barrier 

      Tsertos, Haralambos; Berdermann, E.; Bosch, F.; Clemente, M.; Huchler, S.; Kienle, P.; Koenig, W.; Kozhuharov, C. (1992)
      We present the results obtained from systematic studies of positron creation for a series of heavy-collision systems, with united charge Zu=Z1+Z2 ranging from Zu=164 (Pb + Pb) to Zu=184 (U+U) at bombarding energies close ...