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World Scientific Publishing, International Journal of Modern Physics E, 01(14), p. 95-103

DOI: 10.1142/s0218301305002813

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Electromagnetic transitions with effective operators

Journal article published in 2004 by Ionel Stetcu ORCID, Bruce R. Barrett, Petr Navrátil, Calvin W. Johnson
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This paper is available in a repository.

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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.