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Статья

Arnquist, I.J.
Final Resulsts of the Majorana Demonstrator's Search for Doubles-Beta Decay of *7*6Ge to Exited States of *7*6Se / I.J.Arnquist, S.Vasilyev, [a.o.]. – Text : electronic // Physical Review Letters. – 2025. – Vol. 134, No. 24. – P. 242501. – URL: https://doi.org/10.1103/PhysRevLett.134.242501. – Bibliogr.: 71.

7*6*Ge can 𝛽⁢𝛽 decay into three possible excited states of *7*6Se , with the emission of two or, if the neutrino is Majorana, zero neutrinos. None of these six transitions have yet been observed. The Majorana Demonstrator was designed to study 𝛽⁢𝛽 decay of *7*6Ge using a low background array of high purity germanium detectors. With 98.2 kg-y of isotopic exposure, the demonstrator sets the strongest half-life limits to date for all six transition modes. For 2⁢𝜈⁢𝛽⁢𝛽 to the 0*+&sub(1) state of *7*6Se , this search has begun to probe for the first time half-life values predicted using modern many-body nuclear theory techniques, setting a limit of 𝑇&sub(1/2)>1.5×10&sup(24)  y (90% CL).



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 341.1б - Бета-распад и К-захват. Схемы распада и спектры