2004/09/30 by Ionel Stetcu, Bruce R. Barrett, B. R. Barrett +3 · 2 citations
Physics and Astronomy · #Atomic and Molecular Physics #Neutrino Physics Research #Nuclear physics research studies #nucl-th
paper · pdf · doi:10.1142/s0218301305002813
published as Int.J.Mod.Phys. E14 (2005) 95-104 · Talk at the workshop "Blueprints for the nucleus: from first principles to collective motion"; to be published in Int. J. Mod. Phys. G
arxiv created 2004/09/30 · openalex publication_date 2005/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the no-core shell model formalism we compute effective one- and two-body operators, using the Lee–Suzuki procedure within the two-body cluster approximation. We evaluate the validity of the latter through calculations in reduced model spaces. In particular, we test the results for the two-body system and find that indeed the effective operators in the reduced space reproduce the expectation values or transition strengths computed in the full space. On the other hand, the renormalization for operators in the case of 6 Li is very weak, suggesting the need for higher-body clusters in computing the effective interaction.