Pion scattering to 6- stretched states in Mg24 and Mg26

Inelastic pi +/- cross-section measurements at pion incident energies of 150 and 180 MeV were made on 6- states in Mg-24, Mg-26. In particular, we have determined the (f7/2d5/2(-1))6- isoscalar Z0 = 0.21 +/- 0.02 strength for the strongest T = 0, J-pi = 6- state located at 12.11 +/- 0.05 MeV in Mg-24, and the isoscalar Z0 = 0.17 +/- 0.04 and isovector Z1 = 0.21 +/- 0.02 strength for the strongest T = 1, J-pi = 6- state located at 9.18 MeV in Mg-26. The distorted-wave impulse-approximation pion cross-section calculations required a multiplicative normalization factor of 1.2 +/- 0.1 in order to reproduce the pure isovector strength deduced from electron scattering for the well-known T = 1, J-pi = 6- state at 15.15 MeV in Mg-24 and the T = 2, J-pi = 6- state at 18.05 MeV in Mg-26.