Phys. Rev. Lett. 63, 734 - 737 (1989)Proton propagation in nuclei studied in the A dependence of the (e,e’p) reaction in the quasifree region |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1981: |
D. F. Geesaman, R. Gilman, M. C. Green, R. J. Holt, J. P. Schiffer, B. Zeidman, G. Garino, M. Saber, R. E. Segel, E. J. Beise, G. W. Dodson, S. Hoibraten, L. D. Pham, R. P. Redwine, W. W. Sapp, C. F. Williamson, S. A. Wood, N. S. Chant, P. G. Roos, J. D. Silk, M. Deady, and X. K. Maruyama
Argonne National Laboratory, Argonne, Illinois 60439
Northwestern University, Evanston, Illinois 60201
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
University of Maryland, College Park, Maryland 20742
University of Pennsylvania, Philadelphia, Pennsylvania 19104
Mount Holyoke College, South Hadley, Massachusetts 01075
National Institute for Standards and Technology, Gaithersburg, Maryland 20899
Received 24 April 1989
The A dependence of the (e,e’p) reaction in the quasifree region has been measured at an average Q2 of 0.33 (GeV/c)2 for targets of 12C, 27Al, 58Ni, and 181Ta. The outgoing proton kinetic energy was 180±30 MeV. By comparing the ratio of (e,e’p) coincidence to (e,e’) singles yields, average proton transmissions are obtained for each target. The resulting ‘‘mean free path’’ or, more precisely, the attenuation length for protons in the nucleus is significantly longer than expectations based on the free nucleon-nucleon cross section.
©1989 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v63/p734
DOI: 10.1103/PhysRevLett.63.734
PACS: 25.30.Fj, 24.10.Ht
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