Pionic fusion at subthreshold energies

L. Joulaeizadeh*, J. Bacelar, M. Eslami-Kalantari, I. Gasparic, N. Kalantar-Nayestanaki, H. Löhner, H. Mardanpour, J. G. Messchendorp, H. Moeini, A. Ramazani-Moghaddam-Arani, S. V. Shende, E. Stephan

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review


    In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were (4)He((3)He, pi(0))(7)Be and (6)Li((4)He, pi(0))(10)B at beam energies about 10 MeV above the coherent pion production threshold ( 256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.

    Original languageEnglish
    Pages (from-to)539-543
    Number of pages5
    JournalInternational Journal of Modern Physics A
    Issue number2-3
    Publication statusPublished - 30-Jan-2009
    EventConference MESON 2008 - , Poland
    Duration: 6-Jun-200810-Jun-2008


    • Pionic fusion
    • neutral pion production
    • subthreshold energy

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