Nuclear spectroscopy of 26Al

The tensor analyzing powers T20 and the cross sections for the reaction to levels in 26Al with excitation energies up to 6 MeV have been measured at θlab = 175°. The bombarding energy was varied in steps of 0.5 MeV from 10.0 to 12.5 MeV. Comparison of the measured T20 values with theoretical predictions, taking into account the finite-angle effect, has led to assignments of natural or unnatural parity to some fifty levels in 26Al. Two levels with Jπ = 0− could be identified on the basis of such a comparison. A (probable) assignment of Jπ = 0+ could be made to two levels in 26Al on the basis of a very low observed cross section. The information on spin-parity combinations found in this work was combined with spectroscopic data from other reactions to deduce new unambiguous Jπ assignments for 33 levels and Jπ restrictions for another three level