Double-beta decay of 150Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Nd}$$\end{document} to excited levels of 150Sm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Sm}$$\end{document}

被引：0

作者：

A. S. Barabash ^{[1
]}

P. Belli ^{[2
]}

R. Bernabei ^{[3
]}

R. S. Boiko ^{[2
]}

F. Cappella ^{[3
]}

V. Caracciolo ^{[4
]}

R. Cerulli ^{[5
]}

F. A. Danevich ^{[6
]}

D. L. Fang ^{[7
]}

F. Ferella ^{[2
]}

A. Incicchitti ^{[3
]}

V. V. Kobychev ^{[2
]}

S. I. Konovalov ^{[3
]}

M. Laubenstein ^{[2
]}

A. Leoncini ^{[4
]}

V. Merlo ^{[8
]}

S. Nisi ^{[9
]}

O. Niţescu ^{[10
]}

D. V. Poda ^{[6
]}

O. G. Polischuk ^{[7
]}

I. B.-K. Shcherbakov ^{[4
]}

F. Šimkovic ^{[1
]}

A. Timonina ^{[10
]}

V. S. Tinkova ^{[2
]}

V. I. Tretyak ^{[3
]}

V. I. Umatov ^{[2
]}

机构：

[1] Affiliated with an Institute Taking Part in the Experiment Described in this Article,Dipartimento di Fisica

[2] INFN sezione Roma “Tor Vergata”,Dipartimento di Fisica

[3] Università di Roma “Tor Vergata”,Faculty of Mathematics, Physics and Informatics

[4] Institute for Nuclear Research of NASU,Institute of Experimental and Applied Physics

[5] National University of Life and Environmental Sciences of Ukraine,Present affiliation: Research Centre UNIZA

[6] INFN sezione Roma,undefined

[7] Università di Roma “La Sapienza”,undefined

[8] Institute of Modern Physics,undefined

[9] Chinese Academy of Sciences,undefined

[10] University of Chinese Academy of Sciences,undefined

[11] INFN Laboratori Nazionali del Gran Sasso,undefined

[12] Comenius University in Bratislava,undefined

[13] International Centre for Advanced Training and Research in Physics,undefined

[14] “Horia Hulubei” National Institute of Physics and Nuclear Engineering,undefined

[15] Université Paris-Saclay,undefined

[16] CNRS/IN2P3,undefined

[17] IJCLab,undefined

[18] State Scientific Institution “Institute for Single Crystals” of NASU,undefined

[19] Czech Technical University in Prague,undefined

[20] Institute for Scintillation Materials of NASU,undefined

[21] University of Žilina,undefined

来源：

The European Physical Journal C | / 85卷 / 2期

关键词：

D O I：

10.1140/epjc/s10052-025-13901-y

中图分类号：

学科分类号：

摘要：

The 2ν2β\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\nu 2\beta $$\end{document} decay of 150Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Nd}$$\end{document} to the first excited 740.5 keV 01+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0^{+}_{1}$$\end{document} level of 150Sm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Sm}$$\end{document} was measured over 5.845 years with the help of a four-crystal low-background HPGe γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma $$\end{document} spectrometry 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 01+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0^{+}_{1}$$\end{document} level with energies 334.0 keV and 406.5 keV were observed both in one-dimensional spectrum and in coincidence data resulting in the half-life T1/2=[0.83-0.13+0.18(stat)-0.19+0.16(syst)]×1020\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{1/2}=[0.83^{+0.18}_{-0.13}\mathrm {(stat)}^{+0.16}_{-0.19}\mathrm {(syst)}]\times 10^{20}$$\end{document} year. Interpreting an excess of the 334.0-keV peak area as an indication of the 2β\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\beta $$\end{document} decay of 150Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Nd}$$\end{document} to the 334.0 keV 21+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2^+_1$$\end{document} excited level of 150Sm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Sm}$$\end{document} with a half-life of T1/2=[1.5-0.6+2.3(stat)±0.4(syst)]×1020\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{1/2}=[1.5^{+2.3}_{-0.6}\mathrm {(stat)}\pm 0.4\mathrm {(syst)}]\times 10^{20}$$\end{document} year, the 2ν2β\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\nu 2\beta $$\end{document} half-life of 150Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Nd}$$\end{document} for the transition to the 01+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{+}_{1}$$\end{document} level is T1/2=[1.03-0.22+0.35(stat)-0.19+0.16(syst)]×1020\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{1/2}=[1.03^{+0.35}_{-0.22}\mathrm {(stat)}^{+0.16}_{-0.19}\mathrm {(syst)}]\times 10^{20}$$\end{document} 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 2ν2β\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\nu 2\beta $$\end{document} and 0ν2β\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0\nu 2\beta $$\end{document} transitions of 150Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Nd}$$\end{document} and 148Nd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{148}\hbox {Nd}$$\end{document} to several excited levels of 150Sm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{150}\hbox {Sm}$$\end{document} and 148Sm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{148}\hbox {Sm}$$\end{document}, limits were set at level of T1/2>1020-1021\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{1/2}>10^{20}-10^{21}$$\end{document} year.

引用