Photodisintegration of He4 into p+t

R. Nasseripour, B. L. Berman, N. Benmouna, Y. Ilieva, J. M. Laget, K. P. Adhikari, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, H. Baghdasaryan, J. Ball, M. Battaglieri, I. Bedlinskiy, A. S. Biselli, C. Bookwalter, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, S. L. CarecciaD. S. Carman, P. L. Cole, P. Collins, P. Corvisiero, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, B. Dey, S. Dhamija, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, R. Dupre, G. Fedotov, S. Fegan, R. Fersch, A. Fradi, M. Y. Gabrielyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, H. Hakobyan, C. Hanretty, N. Hassall, D. Heddle, K. Hicks, C. E. Hyde, D. G. Ireland, E. L. Isupov, S. S. Jawalkar, J. R. Johnstone, K. Joo, D. Keller, M. Khandaker, P. Khetarpal, W. Kim, A. Klein, F. J. Klein, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, K. Livingston, H. Y. Lu, M. Mayer, M. E. McCracken, B. McKinnon, T. Mineeva, M. Mirazita, V. Mokeev, K. Moriya, B. Morrison, E. Munevar, P. Nadel-Turonski, C. S. Nepali, S. Niccolai, G. Niculescu, I. Niculescu, M. R. Niroula, M. Osipenko, A. I. Ostrovidov, K. Park, S. Park, E. Pasyuk, S. Anefalos Pereira, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, J. Salamanca, C. Salgado, R. A. Schumacher, H. Seraydaryan, Y. G. Sharabian, D. I. Sober, D. Sokhan, S. Stepanyan, S. S. Stepanyan, P. Stoler, S. Strauch, R. Suleiman, M. Taiuti, D. J. Tedeschi, S. Tkachenko, M. Ungaro, M. F. Vineyard, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, J. Zhang, B. Zhao, Z. W. Zhao

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The two-body photodisintegration of He4 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 He4 target. This is the first measurement of the photodisintegration of He4 above 0.4 GeV. The differential cross sections for the γHe4→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 He3 that demonstrated the great importance of three-body mechanisms in the energy region 0.5-0.8 GeV.

Original languageEnglish (US)
Article number044603
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number4
DOIs
StatePublished - Oct 7 2009

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Nasseripour, R., Berman, B. L., Benmouna, N., Ilieva, Y., Laget, J. M., Adhikari, K. P., Amaryan, M. J., Ambrozewicz, P., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., ... Zhao, Z. W. (2009). Photodisintegration of He4 into p+t. Physical Review C - Nuclear Physics, 80(4), [044603]. https://doi.org/10.1103/PhysRevC.80.044603