Nuclear Shell Model Calculations on Positive and Negative Parity States in upper 0f7/2- Shell Nuclei

The excitation energies for both the positive and negative parities of  (90Sr,90Y,92Nb and 92Zr)  isotopes have been  calculated by employing modified surface delta interaction. A comparison between our results and the available experimental data to theoretical test  for shell model description in  isotopes  above. It was seen that the obtained theoretical results are in agreement with the experimental data for each of  the all isotopes under study . Keywords: Excitation energy , Modified surface delta interaction ,Shell model