First measurement of the reaction He3(,p)X with polarized photons

C. Ruth, G. S. Adams, H. Baghaei, A. Caracappa, W. B. Clayton, A. D'Angelo, M. A. Duval, G. Giordano, S. Hoblit, O. C. Kistner, J. M. Laget, R. Lindgren, G. Matone, L. Miceli, W. K. Mize, M. A. Moinester, A. M. Sandorfi, C. Schaerf, R. M. Sealock, L. C. SmithP. Stoler, D. J. Tedeschi, P. K. Teng, C. E. Thorn, S. T. Thornton, K. Vaziri, C. S. Whisnant, E. J. Winhold

Research output: Contribution to journalArticlepeer-review


The first measurement of the reaction He3(,p)X using linearly polarized photons is reported. Cross sections and beam-polarization asymmetries for plab=60°100°and E=195304 MeV are compared with a microscopic calculation which includes one-, two-, and three-nucleon absorption mechanisms. One- and two-nucleon absorption alone fails to describe the data at low proton momenta. The inclusion of three-nucleon absorption significantly improves the comparison with the measured cross sections. However, some features of the asymmetry distributions are not explained.

Original languageEnglish
Pages (from-to)617-620
Number of pages4
JournalPhysical Review Letters
Issue number5
StatePublished - 1994


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