Annihilation cross-sections of antineutrons on C, Al, Cu, Sn and Pb at low momenta (180–280 MeV/c) with the OBELIX spectrometer

V. G. Ableev,A. Adamo,M. Agnello,F. Balestra,G. Belli,G. Bendiscioli,A. Bertin,P. Boccaccio,G. C. Bonazzola,E. Botta,T. Bressani, M. Bruschi,M. P. Bussa,L. Busso,D. Calvo,M. Capponi,B. Cereda,P. Cerello,C. Cicalò,M. Corradini,S. Costa, S. De Castro, C. De Leo,D. Yu. Desinov,F. D’Isep,A. Donzella,L. Fava,A. Feliciello,L. Ferrero,A. Filippi,V. Filippini,T. D. Galli,R. Garfagnini,U. Gastaldi,B. Giacobbe,P. Gianotti,A. Grasso,C. Guaraldo,F. Iazzi, A. Lanaro,E. Lodi Rizzini,M. Lombardi,V. Lucherini,A. Maggiora,S. Marcello,U. Marconi,G. V. Margagliotti,G. Maron, A. Masoni,I. Massa,B. Minetti, P. Montagna,M. Morando,F. Nichitiu,D. Panzieri,D. Parena,G. Pauli, M. Piccinini,G. Piragino,M. Poli,S. N. Prakhov,G. Puddu,R. A. Ricci,E. Rossetto,A. Rotondi,A. M. Rozhdestvensky,P. Salvini,L. Santi,M. G. Sapozhnikov, N. Semprini-Cesari,S. Serci, R. Spighi,P. Temnikov,S. Tessaro,F. Tosello, V. I. Tretyak,G. L. Usai,L. Vannucci, S. Vecchi, G. Vedovato,L. Venturelli,M. Villa,A. Vitale,A. Zenoni, A. Zoccoli,G. Zosi

Nuovo Cimento Della Societa Italiana Di Fisica A-nuclei Particles and Fields（2007）

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摘要

Summary Annihilation cross-sections σann for antineutrons on some nuclei (C, Al, Cu, Sn and Pb) at three antineutron momenta (180, 240 and 280 MeV/c) were measured at LEAR (CERN) with the OBELIX spectrometer. A behaviour σann=σ0 A ν has been found withν≈2/3. The data are discussed following some models for antineutron-nucleus interaction.

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