Rakhsha Nasseripour,Barry L. Berman,Nawal Benmouna,Yordanka Ilieva,J. M. Laget,Krishna Prasad Adhikari,M. J. Amaryan,P. Ambrozewicz,Marco Anghinolfi,H. Baghdasaryan,J. P. Ball,Marco Battaglieri,I. Bedlinskiy,A. S. Biselli,Craig Bookwalter,Derek Branford,William J. Briscoe,W. K. Brooks,Volker D. Burkert,S. L. Careccia,D. S. Carman,Philip Lawrence Cole,P. Collins,Pietro Corvisiero,A. D’Angelo,A. Daniel,N. B. Dashyan,Raffaella De Vita,E. De Sanctis,Alexandre Deur,Bishal Dey,S. Dhamija,Rachael Dickson,Chaden Djalali,George E. Dodge,D. Doughty,Raphael Dupre,Gennadiy Fedotov,Suzanne Marion Fegan,R. G. Fersch,A. Fradi,M. Y. Gabrielyan,G. P. Gilfoyle,Karina Giovanetti,F. X. Girod,John T. Goetz,Wesley Gohn,E. N. Golovatch,Ralf W. Gothe,K. A. Griffioen,Michel Guidal,L. Guo,Hrant Hakobyan,C. Hanretty,Nanette Hassall,D. Heddle,K. H. Hicks,C. E. Hyde,D. G. Ireland,E. L. Isupov,S. S. Jawalkar,J. R. Johnstone,Kyungseon Joo,Diana Keller,M. Khandaker,Puneet Khetarpal,W. Kim,A. Klein,F. J. Klein,V. Kubarovsky,S. E. Kuhn,Sergey V. Kuleshov,V. Kuznetsov,K. Livingston,H. Y. Lu,M. Mayer,M. E. Mccracken,B. McKinnon,Taisiya Mineeva,Marco Mirazita,Victor I. Mokeev,K. Moriya,Brian Morrison,Edwin Munevar,P. Nadel-Turonski,Chandra Shekhar Nepali,Silvia Niccolai,Gabriel Niculescu,Ioana Niculescu,M. R. Niroula,M. D. Osipenko,A. I. Ostrovidov,Kyungwha Park,Seongsuk Park,Eugene Pasyuk,Sérgio Pereira,Silvia Pisano,O. I. Pogorelko,S. Pozdniakov,J. W. Price,Sébastien Procureur,Yelena Prok,D. Protopopescu,Brian A. Raue,Giovanni Ricco,M. Ripani,Barry Ritchie,G. Rosner,Ph. Rossi,Franck Sabatié,M. S. Saini,J. Salamanca,C. Salgado,Reinhard A. Schumacher,Heghine Seraydaryan,Y. G. Sharabian,D. I. Sober,Daria Sokhan,Stepan Stepanyan,Paul Stoler,S. Strauch,R. Suleiman,Mauro Taiuti,D. J. Tedeschi,Svyatoslav Tkachenko,Maurizio Ungaro,M. F. Vineyard,D. P.. Watts,Larry Weinstein,D. P. Weygand,M. Williams,Emily Wolin,Martin Wood,Jianqin Zhang,B. Zhao,Ziqing W Zhao
semanticscholar（2015）
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摘要
The two-body photodisintegration of 4 He into a proton and a triton has been studied using the CEBAF Large-Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. Real photons produced with the Hall-B bremsstrahlung-tagging system in the energy range from 0.35 to 1.55 GeV were incident on a liquid 4 He target. This is the first measurement of the photodisintegration of 4 He above 0.4 GeV. The differential cross sections for the γ 4 He → pt reaction were measured as a function of photon-beam energy and proton-scattering angle and are compared with the latest model calculations by J.-M. Laget. At 0.6–1.2 GeV, our data are in good agreement only with the calculations that include three-body mechanisms, thus confirming their importance. These results reinforce the conclusion of our previous study of the three-body breakup of 3 He that demonstrated the great importance of three-body mechanisms in the energy region 0.5–0.8 GeV.
