Proton propagation in nuclei studied in the ( e , e prime p ) reaction

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.780· OSTI ID:7234830

Garino, G; Saber, M; Segel, R E ^[1]; Geesaman, D F; Gilman, R; Green, M C; Holt, R J; Schiffer, J P; Zeidman, B ^[2]; Beise, E J; Dodson, G W; Hoibraten, S; Pham, L D; Redwine, R P; Sapp, W W; Williamson, C F; Wood, S A ^[3]; Chant, N S; Roos, P G ^[4]; Silk, J D ^[5] ; Deady, M ^[6]; Maruyama, X K ^[7]

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1. Northwestern University, Evanston, Illinois 60208 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
4. University of Maryland, College Park, Maryland 20742 (United States)
5. University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
6. Mount Holyoke College, South Hadley, Massachusetts 01075 (United States)
7. National Institute for Standards and Technology, Gaithersburg, Maryland 20899 (United States)

Proton propagation in nuclei was studied using the ({ital e},{ital e}{prime}{ital p}) reaction in the quasifree region. The coincidence ({ital e},{ital e}{prime}{ital p}) cross sections were measured at an electron angle of 50.4{degree} and proton angles of 50.1{degree}, 58.2{degree}, 67.9{degree}, and 72.9{degree} for {sup 12}C, {sup 27}Al, {sup 58}Ni, and {sup 181}Ta targets at a beam energy of 779.5 MeV. The average outgoing proton energy was 180 MeV. The ratio of the ({ital e},{ital e}{prime}{ital p}) yield to the simultaneously measured ({ital e},{ital e}{prime}) yield was compared to that calculated in the plane-wave impulse approximation and an experimental transmission defined. These experimental transmissions are considerably larger (a factor of {similar to}2 for {sup 181}Ta) than those one would calculate from the free {ital N}-{ital N} cross sections folded into the nuclear density distribution. A new calculation that includes medium effects ({ital N}-{ital N} correlations, density dependence of the {ital N}-{ital N} cross sections and Pauli suppression) accounts for this increase.

• DOE Contract Number: W-31109-ENG-38; AC02-76ER03069
• OSTI ID: 7234830
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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