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Beam quality: The beam intensities on the target ranged from 20 to 150 nA of Li+++. Target: The CaF2 target employed for the measurements on 19F were approximately 50 mkg/cm2 thick. Target was backed by 25 mkg/cm2 carbon foils. Data obtained: author graph (digitized with GSYS 2.4)The Li beam of the University of Pennsylvania tandem accelerator was used.