HIGH-RESOLUTION 162 MEV PION-SCATTERING TO 6(-) STRETCHED STATES IN MG-26

Inelastic pi+/- cross-section measurements at a pion incident energy o f 162 MeV were made for 12 previously known 6- states in Mg-26. The pe ak resolution was significantly improved over a previous Mg-26(pi,pi') report describing only two 6- states. Using both harmonic oscillator and Woods-Saxon wave functions (unbound as necessary), the pion scatte ring data were combined with electron scattering data to determine the isoscalar magnetic structure coefficients for each state. Although mo re stretched transitions have been located by pion scattering on Mg-26 than in any other nucleus, the total isoscalar strength was only 12% of the extreme single particle sum rule, and only about 1/4 of that pr edicted by more complete calculations. Discrepancies between the isosc alar strengths for several of these states and those found from a comb ined electron-proton scattering analysis are pointed out.