Abstract
Following mass-measurements in the region N = 20 and N = 28, we have studied inelastic nuclear scattering for the nuclei 3 4 Si, 3 3 Al and 3 2 Mg. No evidence for a low lying shape isomeric 0 + state was found in 3 4 Si,and an upper limit for the population cross section could be established, rendering it's existence very unlikely. A new transition was found in 3 3 Al, that is a good candidate for a 2p-2h state and therefore a determination of the 2p-2h gap at N = 20. Inelastic nuclear scattering strongly excites 3 - states, as seen in 3 4 Si. A strong transition was found in 3 2 Mg that should correspond to the first 3 - in this nucleus, lying very low as compared to theory and systematics in this region.
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