2007/03/31 by N. C. Summers, Neil Summers, S. D. Pain +31 · 3 citations
Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Coulomb #Coulomb excitation #Energy (signal processing) #Excitation #Nuclear physics #Nuclear physics research studies #Nucleon #Physics #Projectile #Quantum mechanics #X-ray Spectroscopy and Fluorescence Analysis #nucl-th
paper · pdf · doi:10.1016/j.physletb.2007.05.003
published as Phys.Lett.B650:124-128,2007 · 5 pages, 2 figures, accepted for publication in Phys. Lett. B
openalex publication_date 2007/05/08 · arxiv created 2007/05/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 p recision.