Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy

Parr, E.; Smith, J. F.; Greenlees, P. T.; Butler, P. A.; Auranen, K.; Chapman, R.; Cox, D. M.; Cullen, D. M.; Gaffney, L. P.; Grahn, T.; Gregor, E. T.; Grocutt, L.; Herzáň, A.; Herzberg, R.-D.; Hodge, D.; Jakobsson, U.; Julin, R.; Juutinen, S.; Keatings, J. M.; Konki, J.; Leino, M.; McKee, P. P.; McPeake, C.; Mengoni, D.; Mistry, A. K.; Nara Singh, B. S.; O'Neill, G. G.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Scheck, M.; Scholey, C.; Siciliano, M.; Smolen, M.; Sorri, J.; Spagnoletti, P.; Spohr, K. M.; Stolze, S.; Taylor, M. J.; Uusitalo, J.

doi:10.1103/PhysRevC.105.034303

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Parr, E., Smith, J. F., Greenlees, P. T., Butler, P. A., Auranen, K., Chapman, R., Cox, D. M., Cullen, D. M., Gaffney, L. P., Grahn, T., Gregor, E. T., Grocutt, L., Herzáň, A., Herzberg, R.-D., Hodge, D., Jakobsson, U., Julin, R., Juutinen, S., Keatings, J. M., . . . Uusitalo, J. (2022). Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy. Physical Review C, 105(3), Article 034303. https://doi.org/10.1103/PhysRevC.105.034303

Julkaistu sarjassa

Physical Review C

Tekijät

Parr, E. |

Smith, J. F. |

Greenlees, P. T. |

Butler, P. A. |

Auranen, K. |

Chapman, R. |

Cox, D. M. |

Cullen, D. M. |

Gaffney, L. P. |

Grahn, T. |

Gregor, E. T. |

Grocutt, L. |

Herzáň, A. |

Herzberg, R.-D. |

Hodge, D. |

Jakobsson, U. |

Julin, R. |

Juutinen, S. |

Keatings, J. M. |

Konki, J. |

Leino, M. |

McKee, P. P. |

McPeake, C. |

Mengoni, D. |

Mistry, A. K. |

Nara Singh, B. S. |

O'Neill, G. G. |

Pakarinen, J. |

Papadakis, P. |

Partanen, J. |

Peura, P. |

Rahkila, P. |

Ruotsalainen, P. |

Sandzelius, M. |

Sarén, J. |

Scheck, M. |

Scholey, C. |

Siciliano, M. |

Smolen, M. |

Sorri, J. |

Spagnoletti, P. |

Spohr, K. M. |

Stolze, S. |

Taylor, M. J. |

Uusitalo, J.

Päivämäärä

2022

Oppiaine

Kiihdytinlaboratorio Fysiikka Ydin- ja kiihdytinfysiikan huippuyksikkö Accelerator Laboratory Physics Centre of Excellence in Nuclear and Accelerator Based Physics

Tekijänoikeudet

Low-lying states in the odd-Z isotopes 22189Ac132 and 22591Pa134 have been studied using α-particle and αγ-coincidence spectroscopy in the 225Pa→221Ac→217Fr decay chain. Ground-state spin and parity assignments of Iπ = 5/2− are proposed for both 221Ac and 225Pa, with the odd proton occupying the Ω = 5/2 orbital of the quadrupole-octupole deformed shell model in both nuclei. In 221Ac, excited states in the bands based on the Ω = 5/2 and Ω = 3/2 orbitals have been identified, including proposed parity-doublet states. The results suggest that reflection-asymmetric deformation of the ground state persists in the odd-A members of the isotope chains down to N = 132 for Ac and N = 134 for Pa, before reaching the transitional region at N = 130.

Julkaisija

American Physical Society (APS)

ISSN Hae Julkaisufoorumista

2469-9985

Lisätietoja rahoituksesta

This work is supported in part by the following bodies: STFC (UK) under Grants No. ST/L005808/1 and No. ST/P005101/1 (UWS); the EU 7th Framework Programme, Integrating Activities Transnational Access, Project No. 262010 (ENSAR); the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator Based Physics Programme at JYFL); the Scottish Universities Physics Allia ... showmore

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