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

被引:0
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作者
Barabash, A. S.
Belli, P. [1 ,2 ]
Bernabei, R. [1 ,2 ]
Boiko, R. S. [3 ,4 ]
Cappella, F. [5 ,6 ]
Caracciolo, V. [1 ,2 ]
Cerulli, R. [1 ,2 ]
Danevich, F. A. [1 ,3 ]
Fang, D. L. [7 ,8 ]
Ferella, F. [9 ]
Incicchitti, A. [5 ,6 ]
Kobychev, V. V. [3 ]
Konovalov, S. I.
Laubenstein, M. [9 ]
Leoncini, A. [1 ,2 ]
Merlo, V. [1 ,2 ]
Nisi, S. [9 ]
Nitescu, O. [10 ,11 ,12 ]
Poda, D. V. [13 ]
Polischuk, O. G. [3 ,5 ]
Shcherbakov, I. b. -k. [14 ]
Simkovic, F. [10 ,15 ]
Timonina, A. [14 ]
Tinkova, V. S. [16 ,17 ]
Tretyak, V. I. [3 ,9 ]
Umatov, V. I.
机构
[1] INFN, Sez Roma Tor Vergata, I-00133 Rome, Italy
[2] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
[3] NASU, Inst Nucl Res, UA-03028 Kyiv, Ukraine
[4] Natl Univ Life & Environm Sci Ukraine, UA-03041 Kyiv, Ukraine
[5] INFN, Sez Roma, I-00185 Rome, Italy
[6] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[7] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[8] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[9] INFN, Lab Nazl Gran Sasso, I-67100 Assergi, AQ, Italy
[10] Comenius Univ, Fac Math Phys & Informat, Bratislava 84248, Slovakia
[11] Int Ctr Adv Training & Res Phys, POB MG12, Magurele 077125, Romania
[12] Horia Hulubei Natl Inst Phys & Nucl Engn, 30 Reactorului,POB MG 6, RO-077125 Bucharest, Romania
[13] Univ Paris Saclay, IJCLab, CNRS, IN2P3, F-91405 Orsay, France
[14] NASU, State Sci Inst Inst Single Crystals, UA-61072 Kharkiv, Ukraine
[15] Czech Tech Univ, Inst Expt & Appl Phys, Prague 11000, Czech Republic
[16] NASU, Inst Scintillat Mat, UA-61072 Kharkiv, Ukraine
[17] Univ Zilina, Res Ctr, Univ 8215-1, Zilina 010 26, Slovakia
来源
EUROPEAN PHYSICAL JOURNAL C | 2025年 / 85卷 / 02期
基金
新加坡国家研究基金会;
关键词
NUCLEAR-DATA SHEETS; ELEMENTS; PHYSICS; STATES; GE-76;
D O I
10.1140/epjc/s10052-025-13901-y
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
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.
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页数:30
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