Two-neutrino 2β decay of 150Nd to the 0+1 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm^3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 0+1 (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[6.9+4.0−1.9(stat)±1.1(syst)]×10^9 y. The data taking is in progress to reduce the statistical error.
Kasperovych, D.v., Barabash, A.s., Belli, P., Bernabei, R., Boiko, R.s., Cappella, F., et al. (2019). Study of Double-beta Decay of 150Nd to the First 0+ Excited Level of 150Sm. In I.S.a.J.S. Osvaldo Civitarese (a cura di), WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19) Conference date: 27–31 May 2019, Prague, Czech Republic (pp. 020014-1-020014-5). New YORK : AIP [10.1063/1.5130975].
Study of Double-beta Decay of 150Nd to the First 0+ Excited Level of 150Sm
Bernabei R;Caracciolo V;
2019-01-01
Abstract
Two-neutrino 2β decay of 150Nd to the 0+1 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm^3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 0+1 (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[6.9+4.0−1.9(stat)±1.1(syst)]×10^9 y. The data taking is in progress to reduce the statistical error.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
