2009/05/05 by Y. Tian, Yuan Tian, Z. Ma +2 · 4 citations
Mathematics · Physics and Astronomy · #Classical mechanics #Mathematical analysis #Mathematics #Nuclear physics research studies #Pairing #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Range (aeronautics) #Rare-earth and actinide compounds #Separable space #Superconductivity #Superfluidity #nucl-th
paper · pdf · doi:10.1016/j.physletb.2009.04.067
published as Phys.Lett.B676:44-50,2009 · 9 pages, 6 figures
openalex publication_date 2009/05/05 · arxiv created 2009/08/13 · arxiv updated 2010/11/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The problem of pairing in the S01 channel of finite nuclei is revisited. In nuclear matter forces of separable form can be adjusted to the bare nuclear force, to any phenomenological pairing interaction such as the Gogny force or to exact solutions of the gap equation. In finite nuclei, because of translational invariance, such forces are no longer separable. Using well-known techniques of Talmi and Moshinsky we expand the matrix elements in a series of separable terms, which converges quickly preserving translational invariance and finite range. In this way the complicated problem of a cut-off at large momenta or energies inherent in other separable or zero range pairing forces is avoided. Applications in the framework of the relativistic Hartree–Bogoliubov approach show that the pairing properties are depicted on almost the same footing as by the original pairing interaction not only in nuclear matter, but also in finite nuclei. This simple separable force can be easily applied for the investigation of pairing properties in nuclei far from stability as well as for further investigations going beyond mean field theory.