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Emergence of the N=16 shell gap in 21O by Fernandez-Dominguez, B.; Thomas, J. S.; Catford, W. N.; Delaunay, F.; Brown, S. M.; Orr, N. A.; Rejmund, M.; Achouri, N. L.; Falou, H. Al; Ashwood, N. A.; Beaumel, D.; Blumenfeld, Y.; Brown, B. A.; Chapman, R.; Chartier, M.; Curtis, N.; Force, C.; de France, G.; Franchoo, S.; Guillot, J.; Haigh, P.; Hammache, F.; Labiche, M.; Lapoux, V.; Lemmon, R. C.; Marechal, F.; Moro, A.; Martin, B.; Mougeot, X.; Mouginot, B.; Nalpas, L.; Navin, A.; Patterson, N.; Pietras, B.; Pollacco, E. C.; Leprince, A.; Ramus, A.; Scarpaci, J. A.; de Séréville, N.; Stefan, I.; Sorlin, O.; Wilson, G. is a scholarly article available to read on EtoBox.

What is Emergence of the N=16 shell gap in 21O about?

The spectroscopy of 21O has been investigated using a radioactive 20O beam and the (d,p) reaction in inverse kinematics. The ground and first excited states have been determined to be Jpi=5/2+ and Jpi=1/2+ respectively. Two neutron unbound states were observed at excitation energies of 4.76 +- 0.10 and 6.16 +- 0.11. The spectroscopic factor deduced for the lower of these interpreted as a 3/2+ level, reveals a rather pure 0d3/2 single-particle configuration. The large energy difference between the 3/2+ and 1/2+ states is indicative of the emergence of the N=16 magic number. For the higher lying resonance, which has a character consistent with a spin-parity assignment of 3/2+ or 7/2-, a 71% branching ratio to the first 2+ state in 20O has been observed. The results are compared with new shell model calculations.

Author
Fernandez-Dominguez, B.; Thomas, J. S.; Catford, W. N.; Delaunay, F.; Brown, S. M.; Orr, N. A.; Rejmund, M.; Achouri, N. L.; Falou, H. Al; Ashwood, N. A.; Beaumel, D.; Blumenfeld, Y.; Brown, B. A.; Chapman, R.; Chartier, M.; Curtis, N.; Force, C.; de France, G.; Franchoo, S.; Guillot, J.; Haigh, P.; Hammache, F.; Labiche, M.; Lapoux, V.; Lemmon, R. C.; Marechal, F.; Moro, A.; Martin, B.; Mougeot, X.; Mouginot, B.; Nalpas, L.; Navin, A.; Patterson, N.; Pietras, B.; Pollacco, E. C.; Leprince, A.; Ramus, A.; Scarpaci, J. A.; de Séréville, N.; Stefan, I.; Sorlin, O.; Wilson, G.
Published
2010
Language
EN

More by Fernandez-Dominguez, B.; Thomas, J. S.; Catford, W. N.; Delaunay, F.; Brown, S. M.; Orr, N. A.; Rejmund, M.; Achouri, N. L.; Falou, H. Al; Ashwood, N. A.; Beaumel, D.; Blumenfeld, Y.; Brown, B. A.; Chapman, R.; Chartier, M.; Curtis, N.; Force, C.; de France, G.; Franchoo, S.; Guillot, J.; Haigh, P.; Hammache, F.; Labiche, M.; Lapoux, V.; Lemmon, R. C.; Marechal, F.; Moro, A.; Martin, B.; Mougeot, X.; Mouginot, B.; Nalpas, L.; Navin, A.; Patterson, N.; Pietras, B.; Pollacco, E. C.; Leprince, A.; Ramus, A.; Scarpaci, J. A.; de Séréville, N.; Stefan, I.; Sorlin, O.; Wilson, G.

Browse all works by Fernandez-Dominguez, B.; Thomas, J. S.; Catford, W. N.; Delaunay, F.; Brown, S. M.; Orr, N. A.; Rejmund, M.; Achouri, N. L.; Falou, H. Al; Ashwood, N. A.; Beaumel, D.; Blumenfeld, Y.; Brown, B. A.; Chapman, R.; Chartier, M.; Curtis, N.; Force, C.; de France, G.; Franchoo, S.; Guillot, J.; Haigh, P.; Hammache, F.; Labiche, M.; Lapoux, V.; Lemmon, R. C.; Marechal, F.; Moro, A.; Martin, B.; Mougeot, X.; Mouginot, B.; Nalpas, L.; Navin, A.; Patterson, N.; Pietras, B.; Pollacco, E. C.; Leprince, A.; Ramus, A.; Scarpaci, J. A.; de Séréville, N.; Stefan, I.; Sorlin, O.; Wilson, G.