An experiment to measure the 2beta– decay of 150Nd to excited levels of 150Sm using a highly purified 2.381 kg of Nd_2O_3 sample is in progress in the low-background set-up with 4 HPGe detectors (~ 225 cm^3 volume each). The detector is located deep underground (3600 m w.e.) at the STELLA facility of the Gran Sasso National Laboratory (LNGS) 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 150Sm have been observed in the experimental data accumulated over 39898 h. The preliminary half-life value for 2beta– decay of 150Nd to the first 0^+ excited level in 150Sm over 39898 h was estimated as T_1/2=[9.7^(+2.9)_(-1.9)(stat)+/-1.5 (syst)]x10^19 yr. The experiment is under data taking with the aim to improve the statistical uncertainties.
Polischuk, O.g., Barabash, A.s., Belli, P., Bernabei, R., Boiko, R.s., Cappella, F., et al. (2021). Double beta decay of 150Nd to the first 0+ excited level of 150Sm(E=740.5 keV). PHYSICA SCRIPTA, 96(8) [10.1088/1402-4896/ac00a5].
Double beta decay of 150Nd to the first 0+ excited level of 150Sm(E=740.5 keV)
Bernabei, R;Caracciolo, V;Di Marco, A;
2021-01-01
Abstract
An experiment to measure the 2beta– decay of 150Nd to excited levels of 150Sm using a highly purified 2.381 kg of Nd_2O_3 sample is in progress in the low-background set-up with 4 HPGe detectors (~ 225 cm^3 volume each). The detector is located deep underground (3600 m w.e.) at the STELLA facility of the Gran Sasso National Laboratory (LNGS) 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 150Sm have been observed in the experimental data accumulated over 39898 h. The preliminary half-life value for 2beta– decay of 150Nd to the first 0^+ excited level in 150Sm over 39898 h was estimated as T_1/2=[9.7^(+2.9)_(-1.9)(stat)+/-1.5 (syst)]x10^19 yr. The experiment is under data taking with the aim to improve the statistical uncertainties.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
