High-precision measurement of a low Q value for allowed $\beta^-$-decay of $^{131}$I related to neutrino mass determination - Centre d'Etudes Nucléaires de Bordeaux Gradignan Accéder directement au contenu
Article Dans Une Revue Phys.Lett.B Année : 2022

High-precision measurement of a low Q value for allowed $\beta^-$-decay of $^{131}$I related to neutrino mass determination

T. Eronen
  • Fonction : Auteur
Z. Ge
  • Fonction : Auteur
M. Ramalho
  • Fonction : Auteur
J. Kostensalo
  • Fonction : Auteur
J. Kotila
  • Fonction : Auteur
O. Beliushkina
  • Fonction : Auteur
C. Delafosse
  • Fonction : Auteur
  • PersonId : 1264426
  • IdHAL : c-delafosse
S. Geldhof
  • Fonction : Auteur
W. Gins
  • Fonction : Auteur
A. Jokinen
  • Fonction : Auteur
A. Kankainen
  • Fonction : Auteur
I.D. Moore
  • Fonction : Auteur
D.A. Nesterenko
  • Fonction : Auteur
M. Stryjczyk
  • Fonction : Auteur
J. Suhonen
  • Fonction : Auteur

Résumé

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 logft 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 (1.970.89+2.24) ×107 years, which makes this candidate feasible for neutrino mass searches.

Dates et versions

hal-03664558 , version 1 (11-05-2022)

Identifiants

Citer

T. Eronen, Z. Ge, A. de Roubin, M. Ramalho, J. Kostensalo, et al.. High-precision measurement of a low Q value for allowed $\beta^-$-decay of $^{131}$I related to neutrino mass determination. Phys.Lett.B, 2022, 830, pp.137135. ⟨10.1016/j.physletb.2022.137135⟩. ⟨hal-03664558⟩

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