Electron scattering of 14N based on two-hole excitations

•The nuclear structure of 14N is studied in the framework of the hole-hole TDA and RPA using Warburton and Brown interaction WBP.•The hole-hole excitations are reasonable in description of the data for the energy levels scheme and electron scattering results.•The inclusion of core polarization effects improves the agreement with the experimental data and gives good description for all available momentum transfer data.

The nuclear structure of 14N is studied in the framework of the hole-hole Tamm-Dancoff Approximation (hhTDA) and hole-hole Random Phase Approximation (hh RPA). The Hamiltonian is diagonalized within a model space with particle orbits {1d5/2, 1d3/2, 2s1/2 and 1f7/2}and the hole orbits {1s1/2, 1p3/2 and 1p1/2} using Warburton and Brown interaction WBP. The TDA and RPA amplitudes are used to calculate the longitudinal and transverse electron scattering form factors. The results for JfπTfExMeV= 1+0(0.0), 0+1(2.313), 1+(3.945), 2−0(5.106) and 3−0(5.834) states are interpreted in terms of the harmonic-oscillator (HO) wave functions of size parameter b and compared with the available experimental data. Configurations outside the model space are included approximately, in terms of polarization effective charges and g-factors.