High-precision measurement of the atomic mass of 84Sr and implications to isotope shift studies

Ge, Zhuang; Bai, Shiwei; Eronen, Tommi; Jokinen, Ari; Kankainen, Anu; Kujanpää, Sonja; Moore, Iain; Nesterenko, Dmitrii; Reponen, Mikael

doi:10.1140/epja/s10050-024-01359-7

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Ge, Z., Bai, S., Eronen, T., Jokinen, A., Kankainen, A., Kujanpää, S., Moore, I., Nesterenko, D., & Reponen, M. (2024). High-precision measurement of the atomic mass of 84Sr and implications to isotope shift studies. European Physical Journal A, 60(7), Article 147. https://doi.org/10.1140/epja/s10050-024-01359-7

Julkaistu sarjassa

European Physical Journal A

Tekijät

Ge, Zhuang |

Bai, Shiwei |

Eronen, Tommi |

Jokinen, Ari |

Kankainen, Anu |

Kujanpää, Sonja |

Moore, Iain |

Nesterenko, Dmitrii |

Reponen, Mikael

Päivämäärä

2024

Tekijänoikeudet

The absolute mass of 84Sr was determined using the phase-imaging ion-cyclotron-resonance technique with the JYFLTRAP double Penning trap mass spectrometer. A more precise value for the mass of 84Sr is essential for providing potential indications of physics beyond the Standard Model through high-precision isotope shift measurements of Sr atomic transition frequencies. The mass excess of 84Sr was refined to be -80649.229(37) keV/c2 from high-precision cyclotron-frequency-ratio measurements with a relative precision of 4.8×10−10. The obtained mass-excess value is in agreement with the adopted value in the Atomic Mass Evaluation 2020, but is 30 times more precise. With this new value, we confirm the previously observed nonlinearity in the study of the isotope shift of strontium. Moreover, the double-beta (2β+) decay Q value of 84Sr was directly determined to be 1790.115(37) keV, and the precision was improved by a factor of 30.

Julkaisija

Springer Science and Business Media LLC

ISSN Hae Julkaisufoorumista

1434-6001

Rahoittaja(t)

Suomen Akatemia; Euroopan komissio

Rahoitusohjelmat(t)

Akatemiatutkijan tutkimuskulut, SA; Akatemiatutkija, SA; Akatemiahanke, SA

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

We thank the support by the Academy of Finland under the Finnish Centre of Excellence Programme 2012-2017 (Nuclear and Accelerator Based Physics Research at JYFL) and projects No. 306980, No. 312544, No. 275389, No. 284516, No. 295207, No. 314733, No. 315179, No. 327629, No. 320062, No. 354589 and 345869. The support by the EU Horizon 2020 research and innovation program under grant No. 771036 (E ... showmore

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