Shape coexistence in the odd-odd nucleus 98Y : the role of the g9/2 neutron extruder

Urban, W.; Czerwinski, M.; Kurpeta, J.; Rzaca-Urban, T.; Wisniewski, J.; Materna, T.; Iskra, L. W.; Smith, A. G.; Ahmad, I.; Blanc, A.; Faust, H.; Köster, U.; Jentschel, M.; Mutti, P.; Soldner, T.; Simpson, G. S.; Pinston, J. A.; France, G. de; Ur, C. A.; Elomaa, Viki-Veikko; Eronen, Tommi; Hakala, Jani; Jokinen, Ari; Kankainen, Anu; Moore, Iain; Rissanen, Juho; Saastamoinen, Antti; Szerypo, Jerzy; Weber, Christine; Äystö, Juha

doi:10.1103/physrevc.96.044333

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Urban, W., Czerwinski, M., Kurpeta, J., Rzaca-Urban, T., Wisniewski, J., Materna, T., Iskra, L. W., Smith, A. G., Ahmad, I., Blanc, A., Faust, H., Köster, U., Jentschel, M., Mutti, P., Soldner, T., Simpson, G. S., Pinston, J. A., France, G. D., Ur, C. A., . . . Äystö, J. (2017). Shape coexistence in the odd-odd nucleus 98Y : the role of the g9/2 neutron extruder. Physical Review C, 96(4), Article 044333. https://doi.org/10.1103/physrevc.96.044333

Julkaistu sarjassa

Physical Review C

Tekijät

Urban, W. |

Czerwinski, M. |

Kurpeta, J. |

Rzaca-Urban, T. |

Wisniewski, J. |

Materna, T. |

Iskra, L. W. |

Smith, A. G. |

Ahmad, I. |

Blanc, A. |

Faust, H. |

Köster, U. |

Jentschel, M. |

Mutti, P. |

Soldner, T. |

Simpson, G. S. |

Pinston, J. A. |

France, G. de |

Ur, C. A. |

Elomaa, Viki-Veikko |

Eronen, Tommi |

Hakala, Jani |

Jokinen, Ari |

Kankainen, Anu |

Moore, Iain |

Rissanen, Juho |

Saastamoinen, Antti |

Szerypo, Jerzy |

Weber, Christine |

Äystö, Juha

Päivämäärä

2017

Oppiaine

Kiihdytinlaboratorio Accelerator Laboratory

Tekijänoikeudet

Excited states in 98Y, populated in neutron-induced fission of 235U and in spontaneous fission of 248Cm and 252Cf, have been studied by means of γ spectroscopy using the Lohengrin fission-fragment separator at ILL Grenoble and the EXILL, Eurogam2, and Gammasphere Ge arrays. Two new isomers have been found in 98Y: a deformed one with T1/2 = 180(7) ns and a rotational band on top of it, and a spherical one with T1/2 = 0.45(15)μs, analogous to the 8+ isomer in 96Y, corresponding to the (νg7/2,πg9/2)8+ spherical configuration. Using the JYFLTRAP Penning trap, an accurate excitation energy of 465.7(7) keV has been determined for the 2.36-s isomer in 98Y. This result and the studies of excited levels in 98Zr, populated in β− decay of the isomer, indicate a new spin-parity, I π = (7)+ for the isomer. The high spin and the decay properties of this isomer suggest the presence of the 9/2+[404] neutron extruder orbital in its structure. This is consistent with the large deformation of th ... showmore

Julkaisija

American Physical Society

ISSN Hae Julkaisufoorumista

2469-9985

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