Double-beta decay of 150Nd to excited levels of 150Sm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00382089" target="_blank" >RIV/68407700:21670/25:00382089 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1140/epjc/s10052-025-13901-y" target="_blank" >https://doi.org/10.1140/epjc/s10052-025-13901-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-025-13901-y" target="_blank" >10.1140/epjc/s10052-025-13901-y</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Double-beta decay of 150Nd to excited levels of 150Sm

Popis výsledku v původním jazyce

he 2 nu 2 beta decay of Nd-150 to the first excited 740.5 keV 0(1 )(+)level of Sm-150 was measured over 5.845 years with the help of a four-crystal low-background HPGe gamma spec-trometry system in the underground low-background laboratory STELLA of LNGS-INFN. A 2.381 kg highly purified Nd-containing sample was employed as the decay source. The expected de-excitation gamma-quanta of the 0(1)(+)levelwith energies 334.0 keV and 406.5 keV were observed both in one-dimensional spectrum and in coincidence data resulting in the half-life T-1/2=[0.83(-0.13)(+0.18)(stat)(+0.16)(-0.19)(syst)]x10(20 )year. Interpreting an excess of the 334.0-keV peak area as an indication of the 2 beta decay of Nd-150 to the 334.0 keV 2(1)(+)excited level of Sm-150 with a half-life of T-1/2=[1.5(-0.6)(+2.3)(stat)+/- 0.4(syst)]x10(20 ) year, the 2 nu 2 beta half-life of Nd-150 for the transition to the 0(1 )(+)level is T-1/2=[1.03+0.35-0.22(stat)+0.16-0.19(syst)]x10(20 )year, in agreement with the previous experiments. Both half-life values reasonably agree with the theoretical calculations in the framework of proton-neutron QRPA with isospin restoration combined with like nucleon QRPA for description of excited states in the final nuclei. For 2 nu 2 beta and 0 nu 2 beta transitions of Nd-150 and 148Nd to several excited levels of Sm-150 and148Sm, limits were set at level of T-1/2>10(20 )-10(21)year.

Název v anglickém jazyce

Double-beta decay of 150Nd to excited levels of 150Sm

Popis výsledku anglicky

he 2 nu 2 beta decay of Nd-150 to the first excited 740.5 keV 0(1 )(+)level of Sm-150 was measured over 5.845 years with the help of a four-crystal low-background HPGe gamma spec-trometry system in the underground low-background laboratory STELLA of LNGS-INFN. A 2.381 kg highly purified Nd-containing sample was employed as the decay source. The expected de-excitation gamma-quanta of the 0(1)(+)levelwith energies 334.0 keV and 406.5 keV were observed both in one-dimensional spectrum and in coincidence data resulting in the half-life T-1/2=[0.83(-0.13)(+0.18)(stat)(+0.16)(-0.19)(syst)]x10(20 )year. Interpreting an excess of the 334.0-keV peak area as an indication of the 2 beta decay of Nd-150 to the 334.0 keV 2(1)(+)excited level of Sm-150 with a half-life of T-1/2=[1.5(-0.6)(+2.3)(stat)+/- 0.4(syst)]x10(20 ) year, the 2 nu 2 beta half-life of Nd-150 for the transition to the 0(1 )(+)level is T-1/2=[1.03+0.35-0.22(stat)+0.16-0.19(syst)]x10(20 )year, in agreement with the previous experiments. Both half-life values reasonably agree with the theoretical calculations in the framework of proton-neutron QRPA with isospin restoration combined with like nucleon QRPA for description of excited states in the final nuclei. For 2 nu 2 beta and 0 nu 2 beta transitions of Nd-150 and 148Nd to several excited levels of Sm-150 and148Sm, limits were set at level of T-1/2>10(20 )-10(21)year.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/GA24-10180S" target="_blank" >GA24-10180S: Zkoumaní vlastností neutrin prostřednictvím dvojitého beta rozpadu: Souhra teorie a experimentu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

85

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

30

Strana od-do

1-30

Kód UT WoS článku

001419812800003

EID výsledku v databázi Scopus

2-s2.0-85219753496