Electromagnetic dissociation of relativistic Si28

J. Barrette, R. Bellwied, P. Braun-Munzinger, W. E. Cleland, G. David, J. Dee, O. Dietzsch, E. Duek, M. Fatyga, D. Fox, S. V. Greene, J. R. Hall, T. K. Hemmick, N. Herrmann, B. Hong, K. Jayananda, D. Kraus, B. S. Kumar, R. Lacasse, D. LissauerW. J. Llope, T. Ludlam, S. K. Mark, S. McCorkle, J. T. Mitchell, M. Muthuswamy, E. O'Brien, C. Pruneau, F. S. Rotondo, J. Simon-Gillo, U. Sonnadara, J. Stachel, E. M. Takagui, H. Takai, T. G. Throwe, L. Waters, C. Winter, K. Wolf, D. Wolfe, C. L. Woody, N. Xu, Y. Zhang, Z. Zhang, C. Zou

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We have studied in detail the electromagnetic dissociation of Si28 projectiles at 14.6 GeV/(c nucleon), interacting with Pb, Sn, Cu, and Al targets. Exclusive cross sections were measured for several decay channels, including final states involving the emission of protons, neutrons, and α particles. Excitation energy distributions for the 1n+27Si and 2p+26Mg decay channels were reconstructed with a resolution of 2 MeV, using a constrained kinematic fit. The energy distributions obtained for 1n+27Si are in good agreement with the σ(γ,n) photoneutron cross sections multiplied by the virtual photon spectrum obtained in the Weizsäcker-Williams approximation. A search for the double photon excitation process, based on the dependence of the cross sections on the target atomic number, was performed.

Original languageEnglish
Pages (from-to)865-878
Number of pages14
JournalPhysical Review C
Issue number2
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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