Data di Pubblicazione:
2009
Citazione:
Role of Long-Range correlations in the quenching of spectroscopic factors / C. Barbieri. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 103:20(2009), pp. 202502.1-202502.4.
Abstract:
We consider the proton and neutron quasiparticle orbits around the closed-shell Ni56 and Ca48 isotopes. It is found that large model spaces (beyond the capability of shell model applications) are necessary for predicting the quenching of spectroscopic factors. The particle-vibration coupling is identified as the principal mechanism. Additional correlations-due to configuration with several particle-hole excitations-are estimated using shell model calculations and generate an extra reduction which is □4% for most quasiparticle states. The theoretical calculations nicely agree with (e, e′p) and inverse kinematics knockout experiments. These results open a new path for a microscopic understanding of the shell model.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
shell-model; nuclear-structure; matter
Elenco autori:
C. Barbieri
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