High spin structure of ⁵⁵Cr in deformed Hartree-Fock and angular momentum projection model

Study of chromium isotopes (Z=24), becomes important as these are expected to undergo rapid changes in nuclear shape and related excitation modes throughout the isotopic chain due to the contiguity of magic number at Z=20, 28. The isotope ⁴⁸Cr is a well-deformed nucleus with significant collective behaviour. Further increasing the neutrons, more and more neutrons get occupied to 0f_5/2 and 1p_3/2 orbitals. This affects the shell structure significantly and lead to a more unusual shell structure, particularly when neutrons get occupied in 0g_9/2. In ⁵⁵Cr, involvement of the 0g_9/2 orbital in higher spin bands may lead to unexpected shell structure like ⁴⁸Cr. For getting a detailed picture about the decoupled 0g_9/2 band, appropriate microscopic model is required. Experimentally three bands has been observed with high spin upto J=25/2⁺ with energy 7.430MeV. In the present work the spectrum of ⁵⁵Cr has been investigated using our quantum mechanical model known as deformed Hartree-Fock (HF) and Angular Momentum Projection (J Projection) model. A comparative study has been done among our result, experimental data and other theoretical data. Along with this some structural properties like magnetic dipole and quadrupole quadrupole moment have been reported. Our predictions are in reasonably good agreement with the experiment. We predict both the signature partner of the bands while experimentally only one branches are observed. Along with available spectrum, we have predicted spectra for few more configurations and Q₀, µN values of all bands for future reference. We have compared our results with experimental data and with other theoretical models where data are available