In the present piece of work, the trend of the on set of deformation in neutron-deficient Sr isotopes in Z = 38, N<50 region and the factors which are contr ibu ing towards it, in a suitable microscopic calcu lational framework known as Variation after projection, are studied. The nuclear structure quantities like Yras t spectra, B(E2) transition probabilities, Quadrupole deformation parameter ( β2 ) and sub-shell occupation numbers for eveneven neutron-deficient Sr isotopes are calculated in the HB-framework for the trial wave functions resulting from the pairing-plus-quadrupole-quadrupole-plus-he xadecapole-hexadecapole (PQH) interaction.

Variation-after-projection (VAP) calculations in conjunction with Hartree-Bogoliubov (HB) ansatz have been carried out for A = 98–106 strontium isotopes. In this framework, the yrast spectra with J Π ≥ 10 + , B ( E 2) transition probabilities, quadrupole deformation parameter and occupation numbers for various shell model orbits have been obtained. The results of the calculation for yrast spectra give an indication that it is important to include the hexadecapole-hexadecapole component of the two-body interaction for obtaining various nuclear structure quantities in Sr isotopes. Besides this, it is also found that the simultaneous polarization of p 3/2 and f 5/2 proton subshells is a significant factor in making a sizeable contribution to the deformation in neutron-rich Sr isotopes.