[en] The study on the modifications of single particle orbitals away from the line of stability draws significant attention. In particular, there is a well known level inversion of 0d_5/2 and 1s_1/2 in case of ¹⁵C. Primarily, the neutron-rich nuclei of A = 15 isobars were studied, as compared to the proton-rich counterparts. The present work focuses on the proton-rich nucleus ¹⁵O. It is a radioactive nucleus with a half life of ∼ ¹²²s and forms the core of the borromean nucleus ¹⁷Ne. The present study involves the ¹²C(⁷Be,α) ¹⁵O transfer reaction, using a ⁷Be radioactive beam. The ⁷Be nucleus has a α−³He cluster structure and is expected to have significant transfer and breakup channels