A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
High-precision measurements of the atomic mass and electron-capture decay Q value of 95Tc (2024)

Ge, Z., Eronen, T., Sevestrean, V. A., Niţescu, O., Stoica, S., Ramalho, M., Suhonen, J., de Roubin, A., Nesterenko, D., Kankainen, A., Ascher, P., Ayet, S. A. S., Beliuskina, O., Delahaye, P., Flayol, M., Gerbaux, M., Grévy, S., Hukkanen, M., Jaries, A., . . . Virtanen, V. (2024). High-precision measurements of the atomic mass and electron-capture decay Q value of 95Tc. Physics Letters B, 859, Article 139094. https://doi.org/10.1016/j.physletb.2024.139094

JYU-tekijät tai -toimittajat

Ge, Zhuang
Eronen, Tommi
De Oliveira Ramalho, Marlom
Suhonen, Jouni
Nesterenko, Dmitrii
Kankainen, Anu
Beliuskina, Olga
Hukkanen, Marjut
Jaries, Arthur
Jokinen, Ari
Kotila, Jenni
Moore, Iain
Nikas, Stylianos
Stryjczyk, Marek
Virtanen, Ville

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Ge, Zhuang; Eronen, Tommi; Sevestrean, Vasile Alin; Niţescu, Ovidiu; Stoica, Sabin; Ramalho, Marlom; Suhonen, Jouni; de Roubin, Antoine; Nesterenko, Dmitrii; Kankainen, Anu; et al.

Lehti tai sarja: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Julkaisuvuosi: 2024

Ilmestymispäivä: 24.10.2024

Volyymi: 859

Artikkelinumero: 139094

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.physletb.2024.139094

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/98352

Rinnakkaistallenteen verkko-osoite (pre-print): https://doi.org/10.48550/arXiv.2406.05273

Tiivistelmä

A direct measurement of the ground-state-to-ground-state electron-capture decay Q value of 95Tc has been performed utilizing the double Penning trap mass spectrometer JYFLTRAP. The Q value was determined to be 1695.92(13) keV by taking advantage of the high resolving power of the phase-imaging ion-cyclotron-resonance technique to resolve the low-lying isomeric state of 95Tc (excitation energy of 38.910(40) keV) from the ground state. The mass excess of 95Tc was measured to be −86015.95(18) keV/c2, exhibiting a precision of about 28 times higher and in agreement with the value from the newest Atomic Mass Evaluation (AME2020). Combined with the nuclear energy-level data for the decay-daughter 95Mo, two potential ultra-low Q-value transitions are identified for future long-term neutrino-mass determination experiments. The atomic self-consistent many-electron Dirac–Hartree–Fock–Slater method and the nuclear shell model have been used to predict the partial half-lives and energy-release distributions for the two transitions. The dominant correction terms related to those processes are considered, including the exchange and overlap corrections, and the shake-up and shake-off effects. The normalized distribution of the released energy in the electron-capture decay of 95Tc to excited states of 95Mo is compared to that of 163Ho currently being used for electron-neutrino-mass determination.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka

Vapaat asiasanat: penning trap; mass measurements; ultra-low Q value; electron capture

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