LNGS: O. G. POLISCHUK - SEARCH FOR LONG-LIVED SUPERHEAVY EKATUNGSTEN WITH 116CDWO4 CRYSTAL SCINTILLATOR 
 ELENCO COMPLETO 

DATA: 19-07-2019

LABORATORI NAZIONALI DEL GRAN SASSO
The Aurora experiment at the underground (3600 m w.e.) Laboratori Nazionali del Gran Sasso (INFN, Italy) investigated double beta decay of 116Cd with the help of 1.16-kg cadmium tungstate crystal scintillators enriched in 116Cd to 82% (116CdWO4). The half-life of 116Cd relative to the 2ν2β decay to the ground state of 116Sn was measured with the highest up-to-date accuracy as T1/2 = 2.63 +0.110.12 1019 yr. A new limit on the 0ν2β decay of 116Cd to the ground state of 116Sn was set as T1/2 ≥ 2.2 1023 yr at 90% C.L., which is the most stringent known restriction for this isotope. The data collected with highly radiopure 116CdWO4 crystal scintillators during 26831 h was decided to be also used for a search of long-lived superheavy ekatungsten at the high energy part of the measured α spectrum. The limit obtained in these measurements is in agreement with those obtained in recent experiments which instead look for spontaneous fission of superheavy elements or use the accelerator mass spectrometry. --- Oksana G. Polischuk Institute for Nuclear Research Kiev, Ukraine


 SITO COLLEGATO 
https://agenda.infn.it/e/polischuk_2019

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