A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Direct determination of the atomic mass difference of the pairs 76As−76Se and 155Tb−155Gd rules out 76As and 155 Tb as possible candidates for electron (anti)neutrino mass measurements (2022)

Ge, Z., Eronen, T., de Roubin, A., Kostensalo, J., Suhonen, J., Nesterenko, D. A., Beliuskina, O., de Groote, R., Delafosse, C., Geldhof, S., Gins, W., Hukkanen, M., Jokinen, A., Kankainen, A., Kotila, J., Koszorús, Á., Moore, I. D., Raggio, A., Rinta-Antila, S., . . . Zadvornaya, A. (2022). Direct determination of the atomic mass difference of the pairs 76As−76Se and 155Tb−155Gd rules out 76As and 155 Tb as possible candidates for electron (anti)neutrino mass measurements. Physical Review C, 106(1), Article 015502. https://doi.org/10.1103/PhysRevC.106.015502

JYU-tekijät tai -toimittajat

Ge, ZhuangBeliuskina, Olga
Eronen, Tommi
Suhonen, Jouni
Nesterenko, Dmitrii

de Groote, Ruben
Delafosse, Clement
Geldhof, Sarina
Gins, Wouter
Hukkanen, Marjut
Jokinen, Ari
Kankainen, Anu
Kotila, Jenni
Moore, Iain
Raggio, Andrea
Rinta-Antila, Sami
Virtanen, Ville
Zadvornaya, Alexandra

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Ge, Z.; Eronen, T.; de Roubin, A.; Kostensalo, J.; Suhonen, J.; Nesterenko, D. A.; Beliuskina, O.; de Groote, R.; Delafosse, C.; Geldhof, S.; et al.

Lehti tai sarja: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Julkaisuvuosi: 2022

Ilmestymispäivä: 13.07.2022

Volyymi: 106

Lehden numero: 1

Artikkelinumero: 015502

Kustantaja: American Physical Society (APS)

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevC.106.015502

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/82818

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2202.07656

Tiivistelmä

The first direct determination of the ground-state–to–ground-state Q values of the β− decay 76As→76Se and the electron-capture decay 155Tb→155Gd was performed utilizing the double Penning trap mass spectrometer JYFLTRAP. By measuring the atomic mass difference of the decay pairs via the phase-imaging ion-cyclotron-resonance technique, the Q values of 76As→76Se and 155Tb→155Gd were determined to be 2959.265(74) keV and 814.94(18) keV, respectively. The precision was increased relative to earlier measurements by factors of 12 and 57, respectively. The new Q values are 1.33 keV and 5 keV lower compared to the values adopted in the most recent Atomic Mass Evaluation 2020. With the newly determined ground-state–to–ground-state Q values combined with the excitation energy from γ-ray spectroscopy, the Q values for ground-state–to–excited-state transitions 76As (ground state) →76Se∗ (2968.4(7) keV) and 155Tb (ground state) →155Gd∗ (815.731(3) keV) were derived to be −9.13(70) keV and −0.79(18) keV. Thus we have confirmed that both of the β−-decay and EC-decay candidate transitions are energetically forbidden at a level of at least 4σ, thus definitely excluding these two cases from the list of potential candidates for the search of low-Q-value β− or EC decays to determine the electron-(anti)neutrino mass.

YSO-asiasanat: ydinfysiikka; hiukkasfysiikka; neutriinot

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