Speaker
Description
A detector containing two radiopure cadmium tungstate crystal scintillators enriched in $^{116}$Cd at 82% ($^{116}$CdWO$_4$) with total mass of 1.2 kg was operated during 35324 h at the Gran Sasso Underground Laboratory (INFN, Italy) with the main aim to investigate double beta decay of $^{116}$Cd. As a by-product of the experiment, a new upper limit on atomic abundance of hypothetical naturally occurring long-lived seaborgium (eka-tungsten, Z=106) in tungsten was set at $5.1 \times 10^{-15}$ atom (Sg)/atom (W) with 90% C.L. (assuming the Sg half-life of $10^9$ yr) by the analysis of the alpha decay events. This limit is better than those obtained with a ZnWO$_4$ scintillator and in other types of experiments, which used the accelerator mass spectrometry or searched for spontaneous fission of superheavy elements.
Details
name: Fabio Cappella
title: Researcher
Institution name: INFN-Roma
Country of institution: Italy
Webpage of institution: https://www.roma1.infn.it/home.html
| Is this abstract from experiment? | Yes |
|---|---|
| Name of experiment and experimental site | Experiment at Gran Sasso Underground Laboratory |
| Is the speaker for that presentation defined? | Yes |
| Internet talk | Yes |
