Shape coexistence and the N = 20 shell closure far from stability by inelastic scattering.

Autor: Mittig, W., Savajols, H., Baiborodin, D., Casandjian, J.M., Demonchy, C.E., Roussel-Chomaz, P., Sarazin, F., Dlouhý, Z., Mrazek, J., Belozyorov, A.V., Lukyanov, S.M., Penionzhkevich, Y.E., Alamanos, N., Drouart, A., Gillibert, A., Jouanne, C., Lapoux, V., Pollacco, E., Korichi, A., Scarpaci, J.A.
Zdroj: European Physical Journal A -- Hadrons & Nuclei; Sep2002, Vol. 15 Issue 1/2, p157-160, 4p
Abstrakt: Following mass measurements in the region N = 20 and N = 28, we have studied inelastic nuclear scattering for the nuclei 34Si, 33Al and 32Mg. No evidence for a low-lying shape isomeric 0+ state was found in 34Si, and an upper limit for the population cross-section could be established, rendering its existence very unlikely. A new transition was found in 33Al, 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 34Si. A strong transition was found in 32Mg that should correspond to the first 3- in this nucleus, lying very low as compared to theory and systematics in this region. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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