Seminars

O. G. Polischuk - Search for long-lived superheavy ekatungsten with 116CdWO4 crystal scintillator

by Oksana G. Polischuk (Institute for Nuclear Research, Kyiv, Ukraine)

Europe/Rome
"B. Pontecorvo" room (LNGS)

"B. Pontecorvo" room

LNGS

Description

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 +0.11–0.12 × 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
 

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×