10 research outputs found

    Shape coexistence and the \mth{N=20} shell closure far from stability by inelastic scattering

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    Following mass measurements in the region N=20N=20 and N=28N=28, we have studied inelastic nuclear scattering for the nuclei 34^{34}Si, 33^{33}Al and 32^{32}Mg. No evidence for a low-lying shape isomeric 0+^+ state was found in 34^{34}Si, and an upper limit for the population cross-section could be established, rendering its existence very unlikely. A new transition was found in 33^{33}Al, that is a good candidate for a 2p-2h state and therefore a determination of the 2p-2h gap at N=20N=20. Inelastic nuclear scattering strongly excites 3^- states, as seen in 34^{34}Si. A strong transition was found in 32^{32}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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