24Mg states observed via 20Ne( alpha, alpha 0)20Ne.

We report differential cross-section measurements at up to 16 angles for the reaction {sup 20}Ne({alpha},{alpha}{sub 0}){sup 20}Ne for 3.8{le}{ital E}{sub {alpha}}{le}11 MeV in steps {le}15 keV. The target was a differentially pumped windowless gas target of high-purity Ne, buffered by He to reduce the rate of Ne outflow. A total of 39 levels in {sup 24}Mg (12.5{lt}{ital E}{sub {ital x}}{lt}18.2 MeV) were analyzed by writing the reaction amplitude for spinless positive-parity particles as a nonresonant term which varies linearly with energy plus a sum over only resonant partial waves. In addition, 56 other levels and 22 possible levels were also identified over the same energy region.