## Abstract

A survey of even–even nuclei in the nuclear chart showed regularities in the values of the ratio Q(2_{1} ^{+})/(B(E2) for each nucleus for which independent measurements of both the electric quadrupole moment of the 2_{1} ^{+} state, Q(2_{1} ^{+}), and the reduced transition probability B(E2;0_{1} ^{+}→2_{1} ^{+}) exist. As predicted by the rotational model, this ratio was found to be close to unity for the deformed nuclei in the rare-earth region. For non-rotational nuclei the absolute value of this ratio is almost always considerably lower. This latter observation can be interpreted within different models for different classes of nuclei as illustrated by a set of schematic IBA model calculations. A general mixing model and simple geometrical models are also suitable for collective non-rotational nuclei. Near magic nuclei a mechanism within the seniority scheme is compatible with the observed small value of R_{QB}.

Original language | English (US) |
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Pages (from-to) | 131-142 |

Number of pages | 12 |

Journal | Nuclear Physics A |

Volume | 980 |

DOIs | |

State | Published - Dec 2018 |

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

## Keywords

- Electric quadrupole moment and reduced transition probability