Evidence for a doubly magic 24O

Authors :: Hoffman, C.R.
Baumann, T.
Bazin, D.
Brown, J.
Christian, G.
Denby, D.H.
DeYoung, P.A.
Finck, J.E.
Frank, N.
Hinnefeld, J.
Mosby, S.
Peters, W.A.
Rogers, W.F.
Schiller, A.
Spyrou, A.
Scott, M.J.
Tabor, S.L.
Thoennessen, M.
Voss, P.
Source :: Physics Letters B. Feb2009, Vol. 672 Issue 1, p17-21. 5p.
Publication Year :: 2009
Abstract: Abstract: The decay energy spectrum for neutron unbound states in 24O (, ) has been observed for the first time. The resonance energy of the lowest lying state, interpreted as the level, has been observed at a decay energy above 600 keV. The resulting excitation energy of the level above 4.7 MeV, supplies strong evidence that 24O is a doubly magic nucleus. The data is also consistent with the presence of a second excited state around 5.33 MeV which can be interpreted as the level. [Copyright &y& Elsevier]