Radiative Pion Capture

  • J. P. Perroud


The field of radiative pion capture was opened in 1950 by Panofsky.1 by measuring with a pair ospectormeter what is now called the Panofsky ratio. In 1970 a measurement of 12 C(π,γ)12B by Crowe.2 showed sharp lines in the photon spectrum around 125 MeV establishing the sensitivity of the process to the nuclear structure. In the past three years, a pair spectrometer3 with a resolution of 900 KeV (FWHM) at 130 MeV was used at SIN to measure high energy photon spectra throughout the periodic table with many new levels resolved. Furthermore, the high pion intensity available at meson facilities allowed to collect a high statistic 2H spectrum which led to a new measurement of the neutron-neutron scattering length ann, and to isolate for the first time Is radiative capture by a coincidence experiment in 6Li. Except for very light nuclei 3H, 3He and 4He which have been already extensively reviewed4 almost all of the Berkeley group’s 2 MeV resolution spectra have been remeasured at SIN in a collaboration between the Universities of Lausanne, Munich and Zurich (LMZ). I will therefore concentrate essentially on these new data and try to make some comparisons with measurements in other fields.


Giant Dipole Resonance Photon Spectrum Radiative Capture High Excitation Energy Gamow Teller 
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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • J. P. Perroud
    • 1
  1. 1.Institute of Nuclear Physics BSP DorignyUniversity of LausanneLausanneSwitzerland

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