Effect of 0h_11/2 Level on Shell Model Calculations o ¹⁰⁵Sb and ¹⁰⁷Sb

The full and reduced shell model calculations have been carried out for the light odd--even ¹⁰⁵Sb and ¹⁰⁷Sb isotopes. The model space has been chosen as 1d_5/2, 0g_7/2, 1d_3/2, 2s_1/2, and 0h_11/2 for the full calculations and excluded 0h_11/2 for the reduced calculations. The reduced shell model calculations of ¹⁰⁵Sb and ¹⁰⁷Sb isotopes are presented for the first time. We obtain the energy spectra for the ¹⁰⁵Sb and ¹⁰⁷Sb isotopes in the full and reduced model space by using CD-Bonn two-body effective nucleon--nucleon interaction. The resulting energy spectra are compared to the experimental results to understand the effect of the 0h_11/2 level on the shell model calculations. We draw conclusions about the right model space in the shell model calculations for the isotopes around the N=Z=50 region of the periodic table.