### Abstract

Electromagnetic properties of the negative-parity yrast bands of the N=75 isotones ranging from barium to gadolinium (56<or=Z<or=64) are summarized. Experimental E2/M1 multipole mixing ratios for inband Delta I=1 transitions have been extracted up through the first band crossing, allowing the evaluation of B(M1; I to I-1)/B(E2; I to I-1), B(M1; I to I-1)/B(E2; I to I-2) and B(E2; I to I-1)/B(E2; I to I-2) ratios of reduced transition probabilities for both the nu h_{11/2} and nu h_{11/2}(X)( pi h_{11/2})^{2} configurations. The results obtained at low spin provide evidence for triaxial nuclear shapes, while at high spin the data are consistent with axially symmetric shapes.

Original language | English (US) |
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Article number | 009 |

Pages (from-to) | 605-617 |

Number of pages | 13 |

Journal | Journal of Physics G: Nuclear and Particle Physics |

Volume | 17 |

Issue number | 5 |

DOIs | |

State | Published - Dec 1 1991 |

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### ASJC Scopus subject areas

- Nuclear and High Energy Physics

### Cite this

*Journal of Physics G: Nuclear and Particle Physics*,

*17*(5), 605-617. [009]. https://doi.org/10.1088/0954-3899/17/5/009