Toward a consistent description of parity nonconservation in A=18-21 nuclei

The current theoretical analyses of the parity nonconserving (PNC) experiments in light nuclei fail to provide a consistent description of the experimental data for F18, F19, and Ne21. We perform a "piecewise" analysis of the PNC matrix elements in the 0p12-0d52-1s12 model space and show that by using a proper overall normalization of the isoscalar and isovector parts we can consistently describe all three PNC experimental data. New calculations are also presented for the s-p-sd-pf model space which support our analysis.