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Measurement of the Neutron Radius of Pb-208 through Parity Violation in Electron Scattering

Abrahamyan, S.
; 
Shahinyan, A.
; 
Reimer, P. E.
; 
Armstrong, D. S.
; 
Averett, Todd
; 
Deconinck, W.
; 
Hoskins, J.
; 
Jensen, E.
; 
Leckey, J.
; 
Lee, J. H.
Abstract
We report the first measurement of the parity-violating asymmetry A(PV) in the elastic scattering of polarized electrons from Pb-208. APV is sensitive to the radius of the neutron distribution (R-n). The result A(PV) = 0.656 +/- 0.060(stat) +/- 0.014(syst) ppm corresponds to a difference between the radii of the neutron and proton distributions R-n - R-p = 0.33(-0.18)(+0.16) fm and provides the first electroweak observation of the neutron skin which is expected in a heavy, neutron-rich nucleus.
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2012-01-01
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Measurement_of_the_Neutron_Radius_of_Pb_208_through_Parity_Violation_in_Electron_Scattering.pdf
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Physics
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https://doi.org/10.1103/PhysRevLett.108.112502
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https://scholarworks.wm.edu/handle/internal/734
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