Speaker
Description
The $^{150}$Nd nuclide is one of the most promising to search for double beta decay among 35 naturally occurring double beta isotopes due to the high energy release 3371.38(20) keV and comparatively high isotopic abundance 5.638(28) %. The $2\beta$ transition to the 740.5-keV $0_1^+$ excited level of $^{150}$Sm was observed in few experiments with the half-lives in a wide range $(7 – 14)\times10^{19}$ y.
An experiment to search for $2\beta$ decay in $^{150}$Nd to excited levels of $^{150}$Sm with a highly purified 2.381-kg Nd$_2$O$_3$ sample is in progress in the low-background set-up GeMulti with 4 HPGe detectors ($\approx$225 cm$^3$ volume each) deep underground (3600 m w.e.) at the STELLA facility of the Gran Sasso National Laboratory of the INFN (Italy).
Two gamma-quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the $0_1^+$ excited level of $^{150}$Sm have been observed in the experimental spectra accumulated over 34174 h giving the preliminary half-life value of $^{150}$Nd: $T_{1/2}= [8.4_{-1.4}^{+2.2}(stat.)_{-0.8}^{+4.4}(syst.)]\times10^{19}$ y. The experiment is under data taking with an aim to improve statistical uncertainties.
Details
Oksana Polischuk, Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine. http://www.kinr.kiev.ua/
| Is this abstract from experiment? | No |
|---|---|
| Name of experiment and experimental site | DAMA/KINR collaboration |
| Is the speaker for that presentation defined? | Yes |
| Internet talk | Yes |
