Measurement of the1f72-Neutron-Orbit Radius inCa41

Abstract
The magnetic form factor of Ca41 has been measured by elastic electron scattering in the momentum-transfer range between 1.8 and 3.3 fm1. The 1f72-neutron-orbit radius inferred from these data definitely demonstrates that the explanation of the Coulomb-energy anomaly cannot be found in a reduction of the valence-orbit radius.