Speaker
Dr
Ekaterina Rukhadze
(IEAP CTU in Prague)
Description
The search for double capture 2νEC/EC in Cd-106 is performed on the TGV-2 spectrometer, located in the underground laboratory (LSM, Modane, France, 4800 m.w.e.). The TGV-2 spectrometer consists of 32 planar detectors with a total active surface of about 400 cm3. The detectors are arranged in pairs, and 16 Cd-106 foils (with an enrichment of 99.57% of Cd-106 and a total mass of ~ 23.2 g) are placed between the pairs of face-to-face detectors.
Recent interest to the study of double capture 2νEC/EC has been increased due the announcement of discovery of this extremely rare process by the XENON1T collaboration (https://doi.org/10.1038/s41586-019-1124-4). This result requires further confirmation in other experiments, on other isotopes and using other methods.
The TGV-2 spectrometer provides such a unique alternative method taking data since February 2014. The results of analysis of data taken during 29,000 h will be presented with sensitivity level up to T1/2(2νEC/EC, g.s.) ~ 1 × 10^22 y at 90% C.L. compatible with the results given by the XENON1T.
Primary author
Dr
Yury Shitov
(Joint Institute for Nuclear Researches (JINR))
