Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

被引：78

作者：

Arnold, R. ^{[1
]}

Augier, C.

Baker, J.

Barabash, A. S.

Bongrand, M.

Broudin, G.

Brudanin, V.

Caffrey, A. J.

Egorov, V.

Etienvre, A. I.

Fatemi-Ghomi, N.

Hubert, F.

Hubert, Ph.

Jerie, J.

Jollet, C.

Jullian, S.

King, S.

Kochetov, O.

Konovalov, S. I.

Kovalenko, V.

Lalanne, D.

Lamhamdi, T.

Leccia, F.

Lemiere, Y.

Longuemare, C.

Lutter, G.

Marquete, Ch.

Mauger, F.

Nachab, A.

Ohsumi, H.

Perrot, F.

Piquemal, F.

Reyss, J. L.

Ricol, J. S.

Saakyan, R.

Sarazin, X.

Simard, L.

Simkovic, F.

Shitov, Yu.

Smolnikov, A.

Soldner-Rembold, S.

Stekl, I.

Suhonen, J.

Sutton, C. S.

Szklarz, G.

Thomas, J.

Timkin, V.

Tretyak, V.

Umatov, V.

Vala, L.

机构：

[1] CNRS, IPHC, IN2P3, F-67037 Strasbourg, France

[2] CNRS, IN2P3, LAL, F-91405 Orsay, France

[3] Univ Paris 11, F-91405 Orsay, France

[4] INEEL, Idaho Falls, ID 83415 USA

[5] Inst Theoret & Expt Phys, Moscow 117259, Russia

[6] CNRS, CENBG, IN2P3, F-33170 Gradignan, France

[7] Univ Bordeaux 1, F-33170 Gradignan, France

[8] Joint Inst Nucl Res, Dubna 141980, Russia

[9] Univ Manchester, Manchester M13 9PL, Lancs, England

[10] Czech Tech Univ, IEAP, CZ-12800 Prague, Czech Republic

[11] UCL, London WC1E 6BT, England

[12] USMBA, Fes, Morocco

[13] Univ Caen, F-14032 Caen, France

[14] CNRS, IN2P3, LPC, F-14032 Caen, France

[15] Saga Univ, Saga 8408502, Japan

[16] CENS, LSCE, F-91190 Gif Sur Yvette, France

[17] Comenius Univ, FMFI, SK-84248 Bratislava, Slovakia

[18] Univ Jyvaskyla, Jyvaskyla 40351, Finland

[19] Mt Holyoke Coll, S Hadley, MA 01075 USA

[20] Charles Univ Prague, Prague, Czech Republic

来源：

NUCLEAR PHYSICS A | 2007年 / 781卷 / 1-2期

基金：

英国科学技术设施理事会;

关键词：

double beta decays neutrino; Mo-100; excited state;

D O I：

10.1016/j.nuclphysa.2006.09.021

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The double beta decay of Mo-100 to the 0(1)(+) and 2(1)(+) excited states of Ru-100 is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of Mo-100 to the excited 0(1)(+) state is measured to be T-1/2((2v))=[5.7(-0.9)(+1.3)(stat.) +/- 0.8(syst.)] x 10(20) y. The signal -to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0(1)(+) state has been found. The corresponding half-life limit is T-1/2((Ov)) (0(+)-> 0(1)(+)) > 8.9 X 10(22) y (at 90% C.L.). The search for the double, beta decay to the 2(1)(+) excited state has allowed the determination of limits on the half-life for the two neutrino mode T-1/2((2v)) (0(+)-> 2(1)(+)) > 1.1 x 10(21) y (at 90% C.L.) and for the neutrinoless mode T-1/2((OV)) (0(+)-> 2(1)(+)) > 1.6 x 10(23) y (at 90% C.L.). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：209 / 226

页数：18

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