A new method of accurate polarization measurement on isobaric analog resonance to detect parity non-conservation effect

For the study of parity mixing in the compound states, a method to measure the longitudinal analyzing power A_z of the isobaric analog resonance (IAR) as a function of energy in the proton elastic scattering is discussed. A thick target is used and energy loss of the protons in the target is utilized to measure the energy dependence. The energy resolution is presented and the sources of the systematic errors in A_z are discussed together with the way of their elimination. The method has been shown to be quite efficient for deriving both the transverse and the longitudinal analyzing powers. The measurement of A_z for the s-wave IAR at E_cm=5.86 MeV in ⁹⁰Zr(p,p) and the analysis to derive PNC matrix elements are described.