Measurement of the double-$$\varvec{\beta }$$ decay of $$\varvec{^{150}}$$Nd to the 0$$\varvec{^+_1}$$ excited state of $$\varvec{^{150}}$$Sm in NEMO-3
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Published:2023-12-09
Issue:12
Volume:83
Page:
-
ISSN:1434-6052
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Container-title:The European Physical Journal C
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language:en
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Short-container-title:Eur. Phys. J. C
Author:
Aguerre X., Arnold R., Augier C., Barabash A. S.ORCID, Basharina-Freshville A., Blondel S., Blot S., Bongrand M., Breier R., Brudanin V., Busto J., Bystryakov A.ORCID, Caffrey A. J., Cerna C., Cesar J. P., Ceschia M., Chauveau E., Chopra A., Dawson L., Duchesneau D., Durand D., Evans J. J., Flack R., Franchini P., Garrido X., Girard-Carillo C., Guillon B., Guzowski P., Hoballah M., Hodák R., Hubert P., Hussain M. H., Jullian S., Klimenko A.ORCID, Kochetov O.ORCID, Konovalov S. I.ORCID, Koňařík F., Křižák T., Lalanne D., Lang K.ORCID, Lemière Y., Li P., Loaiza P., Lutter G., Macko M., Mamedov F., Marquet C., Mauger F., Minotti A., Morgan B., Nemchenok I., Nomachi M., Nowacki F., Ohsumi H., Oliviéro G., Palušová V., Patrick C.ORCID, Perrot F., Petro M., Pin A., Piquemal F., Povinec P., Pratt S., Přidal P., Quinn W. S., Ramachers Y. A., Remoto A., Reyss J. L., Riddle C. L., Rukhadze E., Saakyan R., Salamatin A.ORCID, Salazar R., Sarazin X., Sedgbeer J., Shitov Yu., Simard L.ORCID, Šimkovic F., Smetana A., Smolnikov A.ORCID, Söldner-Rembold S.ORCID, Štekl I., Suhonen J.ORCID, Szklarz G., Tedjditi H., Thomas J., Timkin V.ORCID, Tretyak V. I.ORCID, Tretyak V. I.ORCID, Umatov V. I.ORCID, Vanushin I., Vereshchaka Y., Vorobel V., Waters D., Xie F.
Abstract
AbstractThe NEMO-3 results for the double-$$\beta $$
β
decay of $$^{150}$$
150
Nd to the 0$$^+_1$$
1
+
and 2$$^+_1$$
1
+
excited states of $$^{150}$$
150
Sm are reported. The data recorded during 5.25 year with 36.6 g of the isotope $$^{150}$$
150
Nd are used in the analysis. The signal of the $$2\nu \beta \beta $$
2
ν
β
β
transition to the 0$$^+_1$$
1
+
excited state is detected with a statistical significance exceeding 5$$\sigma $$
σ
. The half-life is measured to be $$T_{1/2}^{2\nu \beta \beta }(0^+_1) = \left[ 1.11 ^{+0.19}_{-0.14} \,\left( \hbox {stat}\right) ^{+0.17}_{-0.15}\,\left( \hbox {syst}\right) \right] \times 10^{20}$$
T
1
/
2
2
ν
β
β
(
0
1
+
)
=
1
.
11
-
0.14
+
0.19
stat
-
0.15
+
0.17
syst
×
10
20
year, which is the most precise value that has been measured to date. 90% confidence-level limits are set for the other decay modes. For the $$2\nu \beta \beta $$
2
ν
β
β
decay to the 2$$^+_1$$
1
+
level the limit is $$T^{2\nu \beta \beta }_{1/2}(2^+_1) > 2.42 \times 10^{20}~\hbox {year}$$
T
1
/
2
2
ν
β
β
(
2
1
+
)
>
2.42
×
10
20
year
. The limits on the $$0\nu \beta \beta $$
0
ν
β
β
decay to the 0$$^+_1$$
1
+
and 2$$^+_1$$
1
+
levels of $$^{150}$$
150
Sm are significantly improved to $$T_{1/2}^{0\nu \beta \beta }(0^+_1) > 1.36 \times 10^{22}~\hbox {year}$$
T
1
/
2
0
ν
β
β
(
0
1
+
)
>
1.36
×
10
22
year
and $$T_{1/2}^{0\nu \beta \beta }(2^+_1) > 1.26 \times 10^{22}~\hbox {year}$$
T
1
/
2
0
ν
β
β
(
2
1
+
)
>
1.26
×
10
22
year
.
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference27 articles.
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