Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149Lu

Auranen, K.; Briscoe, A. D.; Ferreira, L. S.; Grahn, T.; Greenlees, P. T.; Herzáň, A.; Illana, A.; Joss, D. T.; Joukainen, H.; Julin, R.; Jutila, H.; Leino, M.; Louko, J.; Luoma, M.; Maglione, E.; Ojala, J.; Page, R. D.; Pakarinen, J.; Rahkila, P.; Romero, J.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Tolosa-Delgado, A.; Uusitalo, J.; Zimba, G.

doi:10.1103/PhysRevLett.128.112501

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Auranen, K., Briscoe, A. D., Ferreira, L. S., Grahn, T., Greenlees, P. T., Herzáň, A., Illana, A., Joss, D. T., Joukainen, H., Julin, R., Jutila, H., Leino, M., Louko, J., Luoma, M., Maglione, E., Ojala, J., Page, R. D., Pakarinen, J., Rahkila, P., . . . Zimba, G. (2022). Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149Lu. Physical Review Letters, 128(11), Article 112501. https://doi.org/10.1103/PhysRevLett.128.112501

Published in

Physical Review Letters

Authors

Auranen, K. |

Briscoe, A. D. |

Ferreira, L. S. |

Grahn, T. |

Greenlees, P. T. |

Herzáň, A. |

Illana, A. |

Joss, D. T. |

Joukainen, H. |

Julin, R. |

Jutila, H. |

Leino, M. |

Louko, J. |

Luoma, M. |

Maglione, E. |

Ojala, J. |

Page, R. D. |

Pakarinen, J. |

Rahkila, P. |

Romero, J. |

Ruotsalainen, P. |

Sandzelius, M. |

Sarén, J. |

Tolosa-Delgado, A. |

Uusitalo, J. |

Zimba, G.

Date

2022

Discipline

Kiihdytinlaboratorio Accelerator Laboratory

Copyright

Using the fusion-evaporation reaction 96Ru(58Ni,p4n)149Lu and the MARA vacuum-mode recoil separator, a new proton-emitting isotope 149Lu has been identified. The measured decay Q value of 1920(20) keV is the highest measured for a ground-state proton decay, and it naturally leads to the shortest directly measured half-life of 450+170−100 ns for a ground-state proton emitter. The decay rate is consistent with lp=5 emission, suggesting a dominant πh11/2 component for the wave function of the proton-emitting state. Through nonadiabatic quasiparticle calculations it was concluded that 149Lu is the most oblate deformed proton emitter observed to date.

Publisher

American Physical Society (APS)

ISSN Search the Publication Forum

0031-9007

Related funder(s)

Academy of Finland

Funding program(s)

Postdoctoral Researcher, AoF

Additional information about funding

This work was supported by the Academy of Finland under the Contract No. 323710 (Personal research project, K. A.). R. D. P. and D. T. J. acknowledge support of the Science and Technology Facilities Council, UK. A. H. would like to thank the Slovak Research and Development Agency under Contract No. APVV-20-0532, and Slovak grant agency VEGA (Contract No. 2/0067/21).

License

Except where otherwise noted, this item's license is described as In Copyright