https://doi.org/10.1140/epja/i2014-14028-7
Regular Article - Experimental Physics
Electric dipole response of 208Pb from proton inelastic scattering: Constraints on neutron skin thickness and symmetry energy
1
Research Center for Nuclear Physics, 10-1 Mihogaoka, 567-0047, Ibaraki, Japan
2
Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
* e-mail: tamii@rcnp.osaka-u.ac.jp
Received:
10
July
2013
Revised:
2
October
2013
Accepted:
9
October
2013
Published online:
26
February
2014
The electric dipole (E1 response of 208Pb has been precisely determined by measuring Coulomb excitation induced by proton scattering at very forward angles. The electric dipole polarizability, defined as inverse energy-weighted sum rule of the E1 strength, has been extracted as 
fm3. The data can be used to constrain the neutron skin thickness of 208Pb to 
fm, where the subscript “expt” refers to the experimental uncertainty, “theor” to the theoretical confidence band and “est” to the uncertainty associated with the estimation of the symmetry energy at the saturation density. In addition, a constraint band has been extracted in the plane of the symmetry energy (J and its slope parameter (L at the saturation density.
© SIF, Springer-Verlag Berlin Heidelberg, 2014
