Evidence that for non absorption reactions of 190‐MeV π+ π− on 27Al multinuclear removal often occurs as separate particles
1998
Gamma‐ray spectra in coincidence with scattered pions at 35° were obtained for π+ and π− incident on 27Al at LAMPF. The gamma‐ray spectra in coincidence with the scattered π+ or π− were separated into two energy bins each: Eπ′<80 MeV and Eπ′≳80 MeV. The average ratio of the differential cross section for the high‐energy bin to the low‐energy bin is 2.0±0.2 for single particle removal and 1.3±0.02 for multiparticle removal indicating that, in addition to possible cluster removal, the particles are removed as separate particles for a significant portion of the time.
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