Radial Dependence of the Nucleon Effective Mass in 10B

The dynamic properties of the atomic nucleus depend strongly on correlations between the nucleons. We present a combined analysis of inelastic electron-scattering data and electron-induced proton knockout measurements in an effort to obtain phenomenological information on nucleon-nucleon correlations. Our results indicate that the ratio of radial wave functions extracted from precise ¹⁰B(e,e′) and ¹⁰B(e,e′p) measurements evolve from an interior depression for small E_m, characteristic of short-range correlations, to a surface-peaked enhancement for larger E_m, characteristic of long-range correlations. This observation can be interpreted in terms of the nucleon effective mass.