Structure of states in 12Be via the 11Be() reaction

Authors :: Kanungo, R.
Gallant, A.T.
Uchida, M.
Andreoiu, C.
Austin, R.A.E.
Bandyopadhyay, D.
Ball, G.C.
Becker, J.A.
Boston, A.J.
Boston, H.C.
Brown, B.A.
Buchmann, L.
Colosimo, S.J.
Clark, R.M.
Cline, D.
Cross, D.S.
Dare, H.
Davids, B.
Drake, T.E.
Djongolov, M.
Source :: Physics Letters B. Jan2010, Vol. 682 Issue 4/5, p391-395. 5p.
Publication Year :: 2010
Abstract: Abstract: The s-wave neutron fraction of the levels in 12Be has been investigated for the first time through the 11Be() transfer reaction using a 11Be beam at TRIUMF, Canada. The reaction populated all the known bound states of 12Be. The ground state s-wave spectroscopic factor was determined to be while that for the long-lived excited state was . This observation, together with the smaller effective separation energy indicates enhanced probability for an extended density tail beyond the 10Be core for the excited state compared to the ground state. [Copyright &y& Elsevier]