Electromagnetic transitions with effective operators
Abstract
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 6Li is very weak, suggesting the need for higher-body clusters in computing the effective interaction.
Cite
@article{arxiv.nucl-th/0409072,
title = {Electromagnetic transitions with effective operators},
author = {Ionel Stetcu and Bruce R. Barrett and Petr Navratil and Calvin W. Johnson},
journal= {arXiv preprint arXiv:nucl-th/0409072},
year = {2007}
}
Comments
Talk at the workshop "Blueprints for the nucleus: from first principles to collective motion"; to be published in Int. J. Mod. Phys. G