B(E1) strengths from Coulomb excitation of 11Be (CROSBI ID 132715)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Summers, N.C. ; Pain, S.D. ; Orr, N. A. ; Catford, W.N. ; Angelique, J. C. ; Ashwood, N.I. ; Bouchat, V. ; Clarke, N.M. ; Curtis, N. ; Freer, M. ; Fulton, B.R. ; Hanappe, F. ; Labiche, M. ; Lecouey, J.L. ; Lemmon, R.C. ; Mahboub, D. ; Ninane, A. ; Normand, G. ; Nunes, F.N. ; Soić, Neven ; Stuttge, L. ; Timis, C.N. ; Thompson, I.J. ; Winfield, J.S. ; Ziman, V.
engleski
B(E1) strengths from Coulomb excitation of 11Be
The B(E1;1/2+→1/2−) strength for 11Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for 11Be+208Pb at 38.6 MeV/nucleon is reported. The B(E1) strength of 0.105(12) e2fm2 derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, i n contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e2fm2. This value is in good agreement with the value deduced independently from the lifetime of the 1/2− state in 11Be, and has a comparable precision.
Coulomb excitation; extended continuum discretized coupled channels method; 11Be
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Podaci o izdanju
650 (2-3)
2007.
124-128
objavljeno
0370-2693
1873-2445
10.1016/j.physletb.2007.05.003