First Study of the 139Ba(𝑛,𝛾)140Ba Reaction to Constrain the Conditions for the Astrophysical 𝑖 Process

Spyrou, A.; Mücher, D.; Denissenkov, P. A.; Herwig, F.; Good, E. C.; Balk, G.; Berg, H. C.; Bleuel, D. L.; Clark, J. A.; Dembski, C.; DeYoung, P. A.; Greaves, B.; Guttormsen, M.; Harris, C.; Larsen, A. C.; Liddick, S. N.; Lyons, S.; Markova, M.; Mogannam, M. J.; Nikas, S.; Owens-Fryar, J.; Palmisano-Kyle, A.; Perdikakis, G.; Pogliano, F.; Quintieri, M.; Richard, A. L.; Santiago-Gonzalez, D.; Savard, G.; Smith, M. K.; Sweet, A.; Tsantiri, A.; Wiedeking, M.

doi:10.1103/PhysRevLett.132.202701

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Spyrou, A., Mücher, D., Denissenkov, P. A., Herwig, F., Good, E. C., Balk, G., Berg, H. C., Bleuel, D. L., Clark, J. A., Dembski, C., DeYoung, P. A., Greaves, B., Guttormsen, M., Harris, C., Larsen, A. C., Liddick, S. N., Lyons, S., Markova, M., Mogannam, M. J., . . . Wiedeking, M. (2024). First Study of the 139Ba(𝑛,𝛾)140Ba Reaction to Constrain the Conditions for the Astrophysical 𝑖 Process. Physical Review Letters, 132(20), Article 202701. https://doi.org/10.1103/PhysRevLett.132.202701

Julkaistu sarjassa

Physical Review Letters

Tekijät

Spyrou, A. |

Mücher, D. |

Denissenkov, P. A. |

Herwig, F. |

Good, E. C. |

Balk, G. |

Berg, H. C. |

Bleuel, D. L. |

Clark, J. A. |

Dembski, C. |

DeYoung, P. A. |

Greaves, B. |

Guttormsen, M. |

Harris, C. |

Larsen, A. C. |

Liddick, S. N. |

Lyons, S. |

Markova, M. |

Mogannam, M. J. |

Nikas, S. |

Owens-Fryar, J. |

Palmisano-Kyle, A. |

Perdikakis, G. |

Pogliano, F. |

Quintieri, M. |

Richard, A. L. |

Santiago-Gonzalez, D. |

Savard, G. |

Smith, M. K. |

Sweet, A. |

Tsantiri, A. |

Wiedeking, M.

Päivämäärä

2024

Tekijänoikeudet

New astronomical observations point to a nucleosynthesis picture that goes beyond what was accepted until recently. The intermediate “i” process was proposed as a plausible scenario to explain some of the unusual abundance patterns observed in metal-poor stars. The most important nuclear physics properties entering i-process calculations are the neutron-capture cross sections and they are almost exclusively not known experimentally. Here we provide the first experimental constraints on the 139Baðn; γÞ140Ba reaction rate, which is the dominant source of uncertainty for the production of lanthanum, a key indicator of i-process conditions. This is an important step towards identifying the exact astrophysical site of stars carrying the i-process signature.

Julkaisija

American Physical Society (APS)

ISSN Hae Julkaisufoorumista

0031-9007

Rahoittaja(t)

Euroopan komissio

Rahoitusohjelmat(t)

The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.

Lisätietoja rahoituksesta

This research used resources of ANL’s ATLAS facility, which is a DOE Office of Science User Facility. The work was supported by the National Science Foundation under Grants No. PHY 1913554, No. PHY 2209429, No. PHY 1430152, and No. PHY 1613188. This material is based upon work supported by the Department of Energy/ National Nuclear Security Administration through the Nuclear Science and Security ... showmore

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