2007/08/22 by F. Delaunay, F. M. Nunes
Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Coulomb #Coulomb barrier #Coulomb excitation #Electron #Energy (signal processing) #Excitation #Nuclear Physics and Applications #Nuclear physics research studies #Nuclear reaction #Physics #Quadrupole #Quantum mechanics #Work (physics) #nucl-ex #nucl-th
paper · pdf · doi:10.1088/0954-3899/34/10/010
published as J. Phys. G: Nucl. Part. Phys. 34, 2207 (2007) · 9 pages, accepted for publication in J. Phys. G: Nucl. Phys
arxiv created 2007/08/22 · openalex publication_date 2007/09/12 · openalex created_date 2016/06/24 · arxiv updated 2020/11/30 · openalex updated_date 2026/08/05
Coulomb excitation is a standard method used to extract quadrupole excitation strengths of even–even nuclei. In typical analyzes the reaction is assumed to be one step, Coulomb only, and is treated within a semi-classical model. In this work, fully quantal coupled-channel calculations are performed for three test cases in order to determine the importance of multi-step effects, nuclear contributions, feeding from other states and corrections to the semi-classical approximation. We study the excitation of 30 S, 58 Ni and 78 Kr on 197 Au at ≈50 A MeV. We find that nuclear effects may contribute more than 10% and that feeding contributions can be larger than 15%. These corrections do not alter significantly the published B ( E 2) values; however, an additional theoretical error of up to 13% should be added to the experimental uncertainty if the semi-classical model is used. This theoretical error is reduced to less than 7% when performing a quantal coupled-channel analysis.