[en] A new level at 10.66 MeV excitation energy in 53Mn, populated by the 52Cr(tau,d)53Mn reaction, is shown to be the isobaric analog state of the Esub(x) = 3.71 MeV, Jsup(π) = 9/2+ level in 53Cr. The proton decay of this analog state is investigated using method II of Litherland and Ferguson. The spin J = 9/2 is established for this state and proton partial widths for transitions to the ground and excited states of the target are extracted by means of the d-p angular correlation measurements. (Auth.)