Naslov
Three-centre cluster structure in 11C and 11B

Autori
Soić, Neven ; Freer, M. ; Donadille, L. ; Clarke, N. M. ; Leask, P. J. ; Catford, W. N. ; Jones, K. L. ; Mahboub, D. ; Fulton, B. R. ; Greenhalgh, B. J. ; Watson, D. L. ; Weisser, D. C.

Izvornik
Journal of physics. G, Nuclear and particle physics (0954-3899) 31 (2005), 10; S1701-S1704

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
nuclear spectroscopy; light nuclei; cluster model; three-body decay

Sažetak
Studies of the 16O(9Be, a7Be)14C, 7Li(9Be, a7Li)5He and 7Li(9Be, aat)5He reactions at Ebeam = 70 and 55 MeV have been performed using resonant particle spectroscopy techniques. The 11C excited states decaying into a+7Be(gs) are observed between 8.5 and 13.5 MeV. The a+7Li(gs), a+7Li* (4.652 MeV) and t+8Be(gs) decays of 11B excited states between 9 and 19 MeV are observed. The decay processes are used to indicate the possible three-centre 2a+3He (2a+3H) cluster structure of observed states. This cluster structure is more prominent in the positive-parity states, where two rotational bands with large deformations are suggested. Excitations of some of the observed T = 1/2 resonances coincide with the energies of previously measured T = 3/2 isobaric analogues of the 11Be states, indicating that these states may have mixed isospin.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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