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High-precision measurement of a low Q value for allowed β−-decay of 131I related to neutrino mass determination (2022)


Eronen, T., Ge, Z., de Roubin, A., Ramalho, M., Kostensalo, J., Kotila, J., Beliushkina, O., Delafosse, C., Geldhof, S., Gins, W., Hukkanen, M., Jokinen, A., Kankainen, A., Moore, I.D., Nesterenko, D.A., Stryjczyk, M., & Suhonen, J. (2022). High-precision measurement of a low Q value for allowed β−-decay of 131I related to neutrino mass determination. Physics Letters B, 830, Article 137135. https://doi.org/10.1016/j.physletb.2022.137135


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Eronen, T.; Ge, Z.; de Roubin, A.; Ramalho, M.; Kostensalo, J.; Kotila, J.; Beliushkina, O.; Delafosse, C.; Geldhof, S.; Gins, W.; et al.

Lehti tai sarja: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Julkaisuvuosi: 2022

Volyymi: 830

Artikkelinumero: 137135

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.physletb.2022.137135

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/80992


Tiivistelmä

The ground-state-to-ground-state β−-decay 131I (7/2+) → 131Xe (3/2+) Q value was determined with high precision utilizing the double Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. The Q value of this β−-decay was found to be Q = 972.25(19) keV through a cyclotron frequency ratio measurement with a relative precision of 1.6 × 10−9. This was realized using the phase-imaging ion-cyclotron-resonance technique. The new Q value is more than 3 times more precise and 2.3σ higher (1.45 keV) than the value extracted from the Atomic Mass Evaluation 2020. Our measurement confirms that the β−-decay to the 9/2+ excited state at 971.22(13) keV in 131Xe is energetically allowed with a Q value of 1.03(23) keV while the decay to the 7/2+ state at 973.11(14) keV was found to be energetically
forbidden. Nuclear shell-model calculations with established two-body interactions, alongside an accurate phase-space factor and a statistical analysis of the log f t values of known allowed β decays, were used to estimate the partial half-life for the low-Q -value transition to the 9/2+ state. The half-life was found to be (1.97+2.24−0.89) ×107 years, which makes this candidate feasible for neutrino mass searches.


YSO-asiasanat: neutriinot; ydinfysiikka

Vapaat asiasanat: Penning trap; Low Q value; β− decay; Neutrino mass


Liittyvät organisaatiot


Hankkeet, joissa julkaisu on tehty


OKM-raportointi: Kyllä

Raportointivuosi: 2022

Alustava JUFO-taso: 2


Viimeisin päivitys 2022-14-09 klo 12:13