Polarization transfer and the spin-parity composition of the charge-exchange continuum

Measured and calculated transverse polarization coefficients are compared at 0° for the reactions ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$(p→,n→), ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$(p→,n→), and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(p→,n→) at intermediate incident energies and at negative Q values up to ∼50 MeV in an attempt to better understand the spin-parity composition of the charge-exchange continuum. Even at 0° the data indicate a significant amount of natural parity spin-flip strength, and this is supported by our calculations. We also present the predicted polarization transfer coefficient spectrum for the (p,n) reaction on ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$ at 500 Mev, whose measurement is anticipated in the near future.