Analysis of (p, t) and (t, p) reaction data for nickel isotopes with structure wave functions of the broken-pair approximation

The broken-pair-approximation (BPA) method is applied successfully to the even nickel isotopes. The BPA wave functions are generated in the configuration space containing four (2p32, 1f52, 2p12, 1g92) valence single-particle orbitals, using the core-renormalized Tabakin interaction. These wave functions are used in the zero-range distorted-wave Born approximation for calculating spectroscopic amplitudes, form factors, angular distributions, and total cross sections for (p, t) and (t, p) reactions. The two-quasiparticle wave functions are also used in calculating these quantities for comparison. The theory gives in general a reasonably good account of the experimental data.