Электронный каталог

Статья

Arnquist, I.J.
Rare Multinucleon Decays with the Full Data Sets of the Majorana Demonstrator / I.J.Arnquist, S.Vasilyev, [a.o.]. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 2. – P. L022501. – URL: https://doi.org/10.1103/2pgp-hvst.

The Majorana Demonstrator was an ultra-low-background experiment designed for neutrinoless double-beta decay (0⁢𝜈⁢𝛽⁢𝛽) investigation in 76Ge . Located at the Sanford Underground Research Facility in Lead, South Dakota, the Demonstrator utilized modular high-purity Ge detector arrays within shielded vacuum cryostats, operating deep underground. The arrays, with a capacity of up to 40.4 kg (27.2 kg enriched to ∼88% in 76 Ge ), have accumulated the full data set, totaling 64.5 kg yr of enriched active exposure and 27.4 kg yr of exposure for natural detectors. Our updated search improves previously explored three-nucleon decay modes in Ge isotopes, setting new partial lifetime limits of 1.83×1026 yr (90% confidence level) for 76 Ge (𝑝⁢𝑝⁢𝑝) → 73 Cu 𝑒+⁢𝜋+⁢𝜋+ and 76 Ge (𝑝⁢𝑝⁢𝑛) → 73 Zn 𝑒+⁢𝜋+. The partial lifetime limit for the fully inclusive triproton decay mode of 76 Ge is found to be 2.1×1025 yr. Furthermore, we have updated limits for corresponding multinucleon decays.



ОИЯИ = ОИЯИ (JINR)2025