Double beta decay of $^{150}$Nd to the first excited $0^+$ level of $^{150}$Sm: preliminary results
| Autor: | Barabash, A. S., Belli, P., Bernabei, R., Boiko, R. S., Cappella, F., Caracciolo, V., Cerulli, R., Danevich, F. A., Di Marco, A., Incicchitti, A., Kasperovych, D. V., Kobychev, R. V., Kobychev, V. V., Konovalov, S. I., Laubenstein, M., Poda, D. V., Polischuk, O. G., Tretyak, V. I., Umatov, V. I. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Nucl. Phys. At. Energy 2018, volume 19, No. 2, pages 95-102 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.15407/jnpae2018.02.095 |
| Popis: | The double beta decay of $^{150}$Nd to the first excited 0$^+$ level of $^{150}$Sm ($E_{exc}$ = 740.5 keV) has been investigated with the help of the ultra-low-background setup consisting of four HP Ge (high-purity germanium) detectors (${\approx}$ 225 cm$^3$ volume each one) at the Gran Sasso underground laboratory of INFN (Italy). A highly purified 2.381-kg sample of neodymium oxide (Nd$_2$O$_3$) was used as a source of ${\gamma}$ quanta expected in the decays. Gamma quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the $0_1^+$ 740.5 keV level of $^{150}$Sm are observed in the coincidence spectra accumulated over 16375 h. The half-life relatively to the two neutrino double beta decay $^{150}$Nd $\rightarrow$ $^{150}$Sm(0$_1^+$) is measured as $T_{1/2} = [4.7_{-1.9}^{+4.1}\text{(stat)} {\pm} 0.5\text{(syst)}] {\times} 10^{19} y$, in agreement with results of previous experiments. Comment: 13 pages, 7 figures and 2 tables |
| Databáze: | arXiv |
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