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Measurement of Nuclear Transparency Ratios for Protons and Neutrons | | M. Duer
; O. Hen
; E. Piasetzky
; L.B. Weinstein
; A. Schmidt
; I. Korover
; E. O. Cohen
; H. Hakobyan
; CLAS Collaboration
; | | Date: |
20 Nov 2018 | | Abstract: | This paper presents, for the first time, measurements of neutron transparency
ratios for nuclei relative to C measured using the $(e,e’n)$ reaction, spanning
measured neutron momenta of 1.4 to 2.4 GeV/$c$. The transparency ratios were
extracted in two kinematical regions, corresponding to knockout of mean-field
nucleons and to the breakup of Short-Range Correlated nucleon pairs. The
extracted neutron transparency ratios are consistent with each other for the
two measured kinematical regions and agree with the proton transparencies
extracted from new and previous $(e,e’p)$ measurements, including those from
neutron-rich nuclei such as lead. The data also agree with and confirm the
Glauber approximation that is commonly used to interpret experimental data. The
nuclear-mass-dependence of the extracted transparencies scales as $A^alpha$
with $alpha = -0.289 pm 0.007$, which is consistent with nuclear-surface
dominance of the reactions. | | Source: | arXiv, 1811.1823 | | Services: | Forum | Review | PDF | Favorites | |
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