Partenaires

CNRS IN2P3 CNRS


Rechercher

Sur ce site

Sur le Web du CNRS


Accueil du site > ANGLAIS > Research > NEMO - Neutrino & Feeble Radioactivity Measurements > Publications > The 2010’s


The 2010’s

If granted, a little click on the journal cover and there’s the full text...

2016

Measurement of the 2νββ decay half-life of 150Nd and a search for 0νββ decay processes with the full exposure from the NEMO-3 detector R. Arnold et al (The NEMO–3 Collaboration) Phys. Rev. D 94, 072003 (2016) – Published 11 October 2016

We present results from a search for neutrinoless double-β (0νββ) decay using 36.6 g of the isotope 150Nd with data corresponding to a live time of 5.25 y recorded with the NEMO-3 detector. We construct a complete background model for this isotope, including a measurement of the two- neutrino double-β decay half-life of T1/2 = [9.34 +- 0.22 (stat.) +0.620.60 (syst.)] x 1018y for the ground state transition, which represents the most precise result to date for this isotope. We perform a multivariate analysis to search for 0νββ decays in order to improve the sensitivity and, in the case of observation, disentangle the possible underlying decay mechanisms. As no evidence for 0νββ decay is observed, we derive lower limits on half-lives for several mechanisms involving physics beyond the Standard Model. The observed lower limit, assuming light Majorana neutrino exchange mediates the decay, is T1/2> 2.0 x 1022 y at the 90% C.L., corresponding to an upper limit on the effective neutrino mass of ν> < 1.6 - 5.3 eV.

Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of 48Ca with the NEMO-3 detector R. Arnold et al (The NEMO–3 Collaboration) Phys. Rev. D 93, 112008 (2016) DOI: 10.1103/PhysRevD.93.112008

The NEMO-3 experiment at the Modane Underground Laboratory investigates the double-beta decay of 48Ca. Using 5.25 yr of data recorded with a 6:99 g sample of 48Ca, approximately 150 double-beta decay candidate events are selected with a signal-to-background ratio greater than 3. The half-life for the two-neutrino double-beta decay of 48Ca is measured to be T1/2 = [6.4+0.7-0.6(stat.) +1.20.9(syst.)] x 1019 yr. A search for neutrinoless double-beta decay of 48Ca yields a null result and a corresponding lower limit on the half-life is found to be T1/2<0ν> > 2.0 x 1022 yr at 90% confidence level, translating into an upper limit on the effective Majorana neutrino mass of ββ < 6.0 - 26 eV, with the range reflecting diFFerent nuclear matrix element calculations. Limits are also set on models involving Majoron emission and right-handed currents.

Reference material for natural radionuclides in glass designed for underground experiments

P. P. Povinec, M. K. Pham, J. Busto, C. Cerna, D. Degering, Y. Hamajima, K. Holý, M. Hult, M. Ješkovský, M. Köhler, A. Kováčik, M. Laubenstein, P. Loaiza, F. Mamedov, Ch. Marquet, J. Mott, M. Műllerová, F. Perrot, F. Piquemal, J.-L. Reyss, R. Saakyan, H. Simgen, B. Soulé, J. Staníček, I. Sýkora, I. Štekl

J Radioanal Nucl Chem (2016) 307: 619 DOI:10.1007/s10967-015-4202-6

A reference material designed for the determination of natural radionuclides in solid samples (glass pellets) is described and the results of certification are presented. The material has been certified for 7 natural radionuclides (40K, 226Ra, 228Ra, 228Th, 232Th, 235U and 238U). An information value is given for 210Pb. Radon (222Rn) emanation experiments showed results comparable within participating laboratories, however, the number of data and precision was too low to carry out a certification process. The reference material may be used for quality management of analytical laboratories engaged in the high-sensitive analysis of radionuclides in the construction materials of detectors placed in ultra low background underground laboratories.

2015

Result of the search for neutrinoless double-β decay in 100Mo with the NEMO-3 experiment

R. Arnold, C. Augier, J.D. Bakery, A.S. Barabash, A. Basharina-Freshville, S. Blondel, S. Blot, M. Bongrand, V. Brudanin, J. Busto, A.J. Caffrey, S. Calvez, C. Cerna, A. Chapon, E. Chauveau, D. Duchesneau, D. Durand, V. Egorov, G. Eurin, J.J. Evans, L. Fajt, D. Filosofov, R. Flack, X. Garrido, H. Gomez, B. Guillon, P. Guzowski, R. Hodak, A. Huber, P. Hubert, C. Hugon, S. Jullian, A. Klimenko, O. Kochetov, S.I. Konovalov, V. Kovalenko, D. Lalanne, K. Lang, Y. Lemiere, T. Le Noblet, Z. Liptak, P. Loaiza, G. Lutter, F. Mamedov, C. Marquet, F. Mauger, B. Morgan, J. Mott, I. Nemchenok, M. Nomachi, F. Nova, F. Nowacki, H. Ohsumi, R.B. Pahlka, F. Perrot, F. Piquemal, P. Povinec, P. Pridal, Y.A. Ramachers, A. Remoto, J.L. Reyss, B. Richards, C.L. Riddle, E. Rukhadze, R. Saakyan, X. Sarazin, Yu. Shitov, L. Simard, F. Simkovic, A. Smetana, K. Smolek, A. Smolnikov, S. Soldner-Rembold, B. Soule, I. Stekl, J. Suhonen, C.S. Sutton, G. Szklarz, J. Thomas, V. Timkin, S. Torre, Vl.I. Tretyak, V.I. Tretyak, V.I. Umatov, I. Vanushin, C. Vilela, V. Vorobel, D. Waters, and A. Zukauskas

NEMO-3 Collaboration

Physical Review D 92(2015) 072011

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double β (0νββ) decay. We report final results of a search for 0νββ decays with 6:914 kg of 100Mo using the entire NEMO-3 data set with a detector live time of 4.96 yr, which corresponds to an exposure of 34.3 kg.yr. We perform a detailed study of the expected background in the νββ signal region and find no evidence of 0νββ decays in the data. The level of observed background in the 0νββ signal region [2.8 - 3.2] MeV is 0.44 - 0.13 counts/yr/kg, and no events are observed in the interval [3.2 - 10] MeV. We therefore derive a lower limit on the half-life of 0νββ decays in 100Mo of T1/2 (0νββ) > 1.1 x 1024 yr at the 90% Confidence Level, under the hypothesis of decay kinematics similar to that for light Majorana neutrino exchange. Depending on the model used for calculating nuclear matrix elements, the limit for the effective Majorana neutrino mass lies in the range (mν) < 0.33 - 0.62 eV. We also report constraints on other lepton-number violating mechanisms for 0νββ decays.

First results of the search for neutrinoless double beta decay with the NEMO 3 detector

R. Arnold, C. Augier, J. Baker, A. Barabash , G. Broudin, V. Brudanin, A.J. Caffrey, E. Caurier, V. Egorov, K. Errahmane, A.I. Etienvre, J.L. Guyonnet, F. Hubert, Ph. Hubert, C. Jollet, S. Jullian, O. Kochetov, V. Kovalenko, S. Konovalov , D. Lalanne, F. Leccia, C. Longuemare, G. Lutter, Ch. Marquet, F. Mauger, F. Nowacki, H. Ohsumi, F. Piquemal, J.L. Reyss, R. Saakyan, X. Sarazin, L. Simard, F. Simkovic, Yu. Shitov, A. Smolnikov, I. Stekl, J. Suhonen, C.S. Sutton, G. Szklarz, J. Thomas, V. Timkin, V. Tretyak, V. Umatov, L. Vala, I. Vanushin, V. Vasilyev, V. Vorobel and Ts. Vylov

NEMO-3 Collaboration

Phys. Rev. Lett. 95:182302,2005

DOI: 10.1103/PhysRevLett.95.182302

The NEMO 3 detector, which has been operating in the Fréjus underground laboratory since February 2003, is devoted to the search for neutrinoless double beta decay (ββ0ν). The half-lives of the two neutrino double beta decay (ββ2ν) have been measured for 100Mo and 82Se. After 389 effective days of data collection from February 2003 until September 2004 (Phase I), no evidence for neutrinoless double beta decay was found from ∼7 kg of 100Mo and ∼1 kg of 82Se. The corresponding limits are T1/2(ββ0ν) > 4.6×1023 years for 100w/sup>Mo and T1/2(ββ0ν) > 1.0×1023 years for 82Se (90% C.L.). Depending on the nuclear matrix element calculation, the limits for the effective Majorana neutrino mass are < 0.7−2.8 eV for 100Mo and < 1.7−4.9 eV for 82Se.

Journal of Environmental Radioactivity

Possibility of wine dating using the natural Pb-210 radioactive isotope

Ph. Hubert, M. S. Pravikoff and J. Gaye

Journal of Environmental Radioactivity 142 (2015) 132-135

DOI: 10.1016/j.jenvrad.2015.01.017

To control the authenticity of an old wine without opening the bottle, we developed a few years ago a method based on the measurement of the 137Cs activity. However, for recent vintages, the 137Cs activity drops to far too low values for this method to perform correctly. In this paper we examine the possibility to date wines using the natural radio-element 210Pb which has a 22-year period. This new method we propose implies the opening of the bottle and the follow-on destruction of the wine itself, which means that it can only be used for investigating non-expensive bottles.

2014

Search for neutrinoless double-beta decay of 100Mo with the NEMO-3 detector

R. Arnold, C. Augier, J. D. Baker, A. S. Barabash, A. Basharina-Freshville, S. Blondel, S. Blot, M. Bongrand, V. Brudanin, J. Busto, A. J. Caffrey, C. Cerna, A. Chapon, E. Chauveau, D. Duchesneau, D. Durand, V. Egorov, G. Eurin, J. J. Evans, R. Flack, X. Garrido, H. Gómez, B. Guillon, P. Guzowski, R. Hodák, P. Hubert, C. Hugon, S. Jullian, A. Klimenko, O. Kochetov, S. I. Konovalov, V. Kovalenko, D. Lalanne, K. Lang, Y. Lemière, Z. Liptak, P. Loaiza, G. Lutter, F. Mamedov, C. Marquet, F. Mauger, B. Morgan, J. Mott, I. Nemchenok, M. Nomachi, F. Nova, F. Nowacki, H. Ohsumi, R. B. Pahlka, F. Perrot, F. Piquemal, P. Povinec, Y. A. Ramachers, A. Remoto, J. L. Reyss, B. Richards, C. L. Riddle, E. Rukhadze, R. Saakyan, X. Sarazin, Yu. Shitov, L. Simard, F. Šimkovic, A. Smetana, K. Smolek, A. Smolnikov, S. Söldner-Rembold, B. Soulé, I. Štekl, J. Suhonen, C. S. Sutton, G. Szklarz, J. Thomas, V. Timkin, S. Torre, Vl. I. Tretyak, V. I. Tretyak, V. I. Umatov, I. Vanushin, C. Vilela, V. Vorobel, D. Waters, and A. Žukauskas

(The NEMO–3 Collaboration)

Phys. Rev. D 89, 111101(R) (2014) DOI: http://dx.doi.org/10.1103/PhysRevD....

We report the results of a search for the neutrinoless double-β decay (0νββ) of 100Mo, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7  kg⋅y, no evidence for the 0νββ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of T1/2(0νββ)>1.1×1024 years (90% C.L.) once both statistical and systematic uncertainties are taken into account. Depending on the nuclear matrix elements this corresponds to an upper limit on the Majorana effective neutrino mass of ⟨mν⟩<0.3–0.9  eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0νββ decays are also given. Searching for high-energy double electron events in all suitable sources of the detector, no event in the energy region [3.2–10] MeV is observed for an exposure of 47  kg⋅y.

Investigation of double beta decay of 100Mo to excited states of 100Ru

R. Arnold, C. Augier, A.S. Barabash, A. Basharina-Freshville, S. Blondel, S. Blot, M. Bongrand, V. Brudanin, J. Busto, A.J. Caffrey, P. Čermák, C. Cerna, A. Chapon, E. Chauveau, L. Dragounová, D. Duchesneau, D. Durand, V. Egorov, G. Eurin, J.J. Evans, R. Flack, X. Garrido, H. Gomez, B. Guillon, P. Guzowski, R. Hodák, P. Hubert, C. Hugon, J. Hulka, S. Jullian, A. Klimenko, O. Kochetov, S.I. Konovalov, V. Kovalenko, D. Lalanne, K. Lang, Y. Lemiere, Z. Liptak, P. Loaiza, G. Lutter, F. Mamedov, C. Marquet, F. Mauger, B. Morgan, J. Mott, I. Nemchenok, M. Nomachi, F. Nova, F. Nowacki, H. Ohsumi, R.B. Pahlka, F. Perrot, F. Piquemal, P. Povinec, Y.A. Ramachers, A. Remoto, J.L. Reyss, B. Richards, C.L. Riddle, E. Rukhadze, N. Rukhadze, R. Saakyan, X. Sarazin, Yu. Shitov, L. Simard, F. Simkovic, A. Smetana, K. Smolek, A. Smolnikov, S. Söldner-Rembold, B. Soulé, I. Stekl, J. Suhonen, C.S. Sutton, G. Szklarz, J. Thomas, V. Timkin, S. Torre, V.I. Tretyak, Vl.I. Tretyak, V. Umatov, C. Vilela, V. Vorobel, G. Warot, D. Waters, A. Zukauskas

(The NEMO–3 Collaboration)

Nuclear Physics A925 (2014) 25–36

Double beta decay of 100Mo to the excited states of daughter nuclei has been studied using a 600 cm3 low-background HPGe detector and an external source consisting of 2588 g of 97.5% enriched metallic 100Mo, which was formerly inside the NEMO-3 detector and used for the NEMO-3 measurements of 100Mo. The half-life for the two-neutrino double beta decay of 100Mo to the excited 01+ state in 100Ru is measured to be T1/2 = [7.5 ± 0.6(stat) ± 0.6(syst)] · 1020 yr. For other (0ν + 2ν) transitions to the 21+, 22+, 02+, 23+ and 03+ levels in 100Ru, limits are obtained at the level of ∼ (0.25 − 1.1) · 1022 yr.

2013

210Pb as a Marker of Natural Radioactivity: Would it Play a Role in Some Human Diseases?

V. Beillet-Kovalenko, Ch. Marquet, J. Gaye, M. S. Pravikoff, Ph. Hubert

Nuclear Physics News, Vol. 23, No. 4, 2013, p. 24-28

Lead-210 is unknown to the general public but one of its daughters, polonium-210, made newspaper head-lines several times in 2006 and 2012. In 2006 the whole world learned that a former Russian KGB agent named Alexander Litvinenko had been poisoned by polonium-210, a powerful short-lived alpha emitter. The ingested poisoning activity was estimated to be more than 1–3 GBq, which is 6 μg of pure 210Po. The experts agree that it is an ideal weapon, impossible to detect with the naked eye and that a lethal dose can be held in a volume the size of a homeopathic pill. In 2012 we learned that traces of 210Po were found on the underwear, hat, and toothbrush of Yasser Arafat, the Palestinian leader who died in 2004. Calculation of the activity at the time of his death shows that poisoning with 210Po is not excluded. The different samples collected during the exhumation will probably answer the question. Those two spectacular cases raise the following question: if a huge dose of polonium is lethal and since this radioactive nucleus is very common in nature, what is the impact of a daily low dose on a human body?

Nuclear Physics News Intl Double Beta Decay Experiments: Beginning of a New Era

Alexander Barabash & Fabrice Piquemal

Nuclear Physics News, Vol. 23, No. 3, 2013, p. 12-18

Interest in neutrinoless double beta decay (0νββ) has seen a significant renewal in the recent 10 years after evidence for neutrino oscillations was obtained from the results of atmospheric, solar, reactor, and accelerator neutrino experiments. These results are impressive proof that neutrinos have a nonzero mass. The detection and study of 0νββ decay may clarify the following problems of neutrino physics: (i) lepton number non-conservation, (ii) neutrino nature: whether the neutrino is a Dirac or a Majorana particle, (iii) absolute neutrino mass scale, (iv) the type of neutrino mass hierarchy (normal, inverted, or quasidegenerate), and (v) CP violation in the lepton sector (measurement of the Majorana CP-violating phases).

Future double beta decay experiments

F. Piquemal

Nuclear Physics B (Proc. Suppl.) 235–236 (2013) 273–280

The search of neutrinoless double beta decay is very challenging because of the expected half-life of the process and the backgrounds from the natural radioactivity. Many projects exist to try to reach a sensitivity of ∼ 50 meV on the effective neutrino mass corresponding to a mass of isotopes of ∼ 100 kg. In this article some of the futur projects are presented.


2012

Journal of Environmental Radioactivity Evidence of 131I and 134,137Cs activities in Bordeaux, France due to the Fukushima nuclear accident

F. Perrot, P. Hubert, Ch. Marquet, M. S. Pravikoff, P. Bourquin, H. Chiron, Py. Guernion, A. Nachab

Journal of Environmental Radioactivity, Vol. 114, p.61, 2012

Following the Fukushima nuclear accident, low-background gamma spectrometry measurements were performed with HPGe detectors at the PRISNA platform located at the CENBG laboratory in Bordeaux, France. Different kinds of samples were collected and measured between March 26 and May 14, 2011. The first fission product observed was 131I with maximum activity values of 2.4 mBq/m3 in atmospheric dusts in air, 3.5 Bq/L in rain water, 15 Bq/kg in grass and 0.9 Bq/L in cow milk. The 134,137Cs isotopes were also detected in air and in grass at a maximum level of 0.2 mBq/m3 and 0.7 Bq/kg respectively, around one order of magnitude less than 131I activity, but they were below detection limits in the other samples. All these activity values were consistent with others measured in France by IRSN and were well below those reported in May 1986 after the Chernobyl accident.

Journal of Environmental Radioactivity Air radioactivity levels following the Fukushima reactor accident measured at the Laboratoire Souterrain de Modane, France

P. Loaiza, V. Brudanin, F. Piquemal, J.-L. Reyss, I. Stekl, G. Warot, M. Zampaolo

Journal of Environmental Radioactivity 114 (2012) 66-70

The radioactivity levels in the air of the radionuclides released by the Fukushima accident were measured at the Laboratoire Souterrain de Modane, in the South-East of France, during the period 25 March -18 April 2011. Air-filters from the ventilation system exposed for one or two days were measured using low-background gamma-ray spectrometry. In this paper we present the activity concentrations obtained for the radionuclides 131I, 132Te, 134Cs, 137Cs, 95Nb, 95Zr, 106Ru, 140Ba/La and 103Ru. The activity concentration of 131I was of the order of 100 mBq/m3, more than 100 times higher than the activities of other fission products. The highest activities of 131I were measured as a first peak on 30 March and a second peak on 3e4 April. The activity concentrations of 134Cs and 137Cs varied from 5 to 30 mBq/m3. The highest activity concentration recorded for Cs corresponded to the same period as for 131I, with a peak on 2-3 April. The results of the radioactivity concentration levels in grass and mushrooms exposed to the air in the Modane region were also measured. Activity concentrations of 131I of about 100 mBq/m2 were found in grass.

The NEMO-3 results after completion of data taking

L Simard (On behalf ofthe Nemo-3 collaboration)

12th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2011)

IOP Publishing

Journal of Physics: Conference Series 375 (2012) 042011 DOI:10.1088/1742-6596/375/4/042011

The double beta decay experiment NEMO-3 has compleated data taking in January 2011. The aim of the experiment is to search for the neutrinoless double beta decay and investigate the two-neutrino double beta decay in seven different isotopes (100Mo, 82Se, 116Cd, 150Nd, 96Zr, 48Ca and 130Te). After analysis of the most part of available data corresponding to 4.5 yr no evidence for 0νββ decay in 100Mo and 82Se is found. The half-life limits at 90% C.L. are 1.0x1024 yr and 3.2x1023 yr respectively. The two-neutrino decay half live values were precisely measured for all investigated isotopes.

The NEMO-3 Experiment

R. B. Pahlka on behalf of the NEMO-3 Collaboration

Nuclear Physics B (Proc. Suppl.) 229–232 (2012) 491

The NEMO-3 (Neutrino Ettore Majorana Observatory) experiment, located in the Modane Underground Laboratory, is currently searching for neutrinoless double beta decay (0νββ). The experiment has been taking data since 2003 with seven double beta isotopes and is scheduled to complete data acquisition in late 2010. Two neutrino double beta decay (2νββ) results for the main isotopes (7 kg of 100Mo and 1 kg of 82Se), new results for 150Nd, as well as results for 96Zr, 48Ca, 130Te and 116Cd are presented. NEMO-3 uses a unique technique that allows for the in situ measurement of background contamination. No evidence for neutrinoless double beta decay has been found to date. The data are also interpreted in terms of alternative models such as weak right-handed currents and Majoron emission.


2011

Improved limits on β+EC and ECEC processes in Sn112

A.S. Barabash, Ph. Hubert, C. Marquet, A. Nachab, S. I. Konovalov, F. Perrot, F. Piquemal, V. Umatov

Physical Review C 83 (2011) 045503

Limits on β+EC and ECEC processes in Sn112 have been obtained using a 380 cm3 HPGe detector and an external source consisting of 100 g enriched tin (94.32% of Sn112). A limit with 90% C.L. on the Sn112 half-life of 1.3×1021 yr for the ECEC(0ν) transition to the 03+ excited state in Cd112 (1871 keV) has been established. This transition has been discussed in the context of a possible enhancement of the decay rate. The limits on other β+EC and ECEC processes in Sn112 have also been obtained on the level of (0.1-1.6)×1021 yr at the 90% C.L.

Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, S. Blondel, M. Bongrand, G. Broudin-Bay, V. Brudanin, A. J. Caffrey, A. Chapon, E. Chauveau, D. Durand, V. A. Egorov, R. Flack, X. Garrido, J. Grozier, B. Guillon, Ph. Hubert, C. M. Jackson, S. Jullian, M. Kauer, A. Klimenko, O. Kochetov, S. I. Konovalov, V. V. Kovalenko, D. Lalanne, T. Lamhamdi, K. Lang, Z. Liptak, G. Lutter, F. Mamedov, Ch. Marquet, J. Martin-Albo, F. Mauger, J. Mott, A. Nachab4, I. Nemchenok, C. H. Nguyen, F. Nova, P. Novella, H. Ohsumi, R. B. Pahlka, F. Perrot, F. Piquemal, J. L. Reyss, B. Richards, J. S. Ricol, R. Saakyan, X. Sarazin, Yu. Shitov, L. Simard, F. Šimkovic, A. Smolnikov, S. Söldner-Rembold, I. Štekl, J. Suhonen, C. S. Sutton, G. Szklarz, J. Thomas, V. Timkin, S. Torre, V. I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, T. Vylov, A. Zukauskas

NEMO Collaboration(s)

Physical Review Letters 107 (2011) 062504

This Letter reports results from the NEMO-3 experiment based on an exposure of 1275 days with 661g of 130Te in the form of enriched and natural tellurium foils. With this data set the double beta decay rate of 130Te is found to be non-zero with a significance of 7.7 standard deviations and the half-life is measured to be T1/2 = (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^20 yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.

Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors

J. Argyriades, R. Arnold, C. Augier, J. Baker, A.S. Barabash, M. Bongrand, G. Broudin-Bay, V.B. Brudanin, A.J. Caffrey, S. Cebrián, A. Chapon, E. Chauveau, Th. Dafni, Z. Daraktchieva, J. Díaz, D. Durand, V.G. Egorov, J.J. Evans, N. Fatemi-Ghomi, R. Flack, A. Basharina-Freshville, K.-I. Fushimi, X. Garrido, H. Gómez, B. Guillon4, A. Holin, K. Holy, J.J. Horkley, Ph. Hubert, C. Hugon, F.J. Iguaz, I.G. Irastorza, N. Ishihara, C.M. Jackson, S. Jullian, S. Kanamaru, M. Kauer, O. I. Kochetov, S.I. Konovalov, V.E. Kovalenko, D. Lalanne, K. Lang, Y. Lemière, G. Lutter, G. Luzón, F. Mamedov, Ch. Marquet, J. Martin-Albo, F. Mauger, F. Monrabal, A. Nachab, I. Nasteva, I.B. Nemchenok, Chi-Hung Nguyen, F. Nova, P. Novella, H. Ohsumi, R.B. Pahlka, F. Perrot, F. Piquemal5, P.P. Povinec, B. Richards, J.S. Ricol, C.L. Riddle, A. Rodriguez, R. Saakyan, X. Sarazin, J.K. Sedgbeer, L. Serra, L. Simard, F. Simkovic, Yu.A. Shitov, A.A. Smolnikov, S. Söldner-Rembold, I. Stekl, Y. Sugaya, C.S. Sutton, G. Szklarz1, Y. Tamagawa, J. Thomas, R. Thompson, V.V. Timkin, V.I. Tretyak, Vl.I. Tretyak, V.I. Umatov, L. Vála, I.A. Vanyushin, R. Vasiliev, V. Vorobel, Ts. Vylov, D. Waters, N. Yahlali, A. Zukauskas

Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 625 (2011) 20-28

Proceedings of the First International Workshop on Multiple Partonic Interactions at the LHC (MPI08)

We have constructed a GEANT4-based detailed software model of photon transport in plastic scintillator blocks and have used it to study the NEMO-3 and SuperNEMO calorimeters employed in experiments designed to search for neutrinoless double beta decay. We compare our simulations to measurements using conversion electrons from a calibration source of ^207Bi and show that the agreement is improved if wavelength-dependent properties of the calorimeter are taken into account. In this article, we briefly describe our modeling approach and results of our studies.

Low background germanium planar detector for gamma-ray spectrometry

P. Loaiza-, C. Chassaing, Ph. Hubert, A. Nachab, F. Perrot, J.-L. Reyss, G.Warot

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume 634, Issue 1, 1 April 2011, Pages 64–70

A new ultra-low background planar germanium spectrometer has been developed. The planar geometry improves the sensitivity and energy resolution below 600 keV. The integral background counting rate in the Laboratoire Souterrain de Modane (4800 m water equivalent) in the energy range from 20 to 1500 keV for the planar Ge (mass around 800 g) is 140 counts/day. After 40 days of statistics, the background counting rates for all expected single lines are below 0.5count/day with the exception of 210Pb (46 keV line) which was measured to be (1.76+-0.25) counts /day. Monte-Carlo simulations have been performed to explain the origin of the remaining background and to calculate the detection efficiencies. Sensitivities around 1 mBq/kg are obtained within a fewdays of statistics for 226Ra and 228Th. The main achievement is the high sensitivities for 210Pb (46 keV line) and 238U (234Th: 63 and 93 keV lines). For an aluminum sample (mass 1 kg) the limits obtained in 15 days are 210P < 9 mBq/kg and 238U < 3mBq/kg.


2010

Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, V. Brudanin, A. J. Caffrey, S. Cebrián, A. Chapon, E. Chauveau, Th. Dafni, F. F. Deppisch, J. Diaz, D. Durand, V. A. Egorov, J. J. Evans, R. Flack, K-I. Fushima, I. García Irastorza, X. Garrido, H. Gómez, B. Guillon, A. Holin, K. Holy, J. J. Horkley, Ph. Hubert, C. Hugon, F. J. Iguaz, N. Ishihara, C. M. Jackson, S. Jullian, M. Kauer, O. Kochetov, S. I. Konovalov, V. V. Kovalenko1, T. Lamhamdi, K. Lang, G. Lutter, G. Luzón, F. Mamedov, Ch. Marquet, F. Mauger, F. Monrabal, A. Nachab, I. Nasteva, I. Nemchenok, C. H. Nguyen6, M. Nomachi, F. Nova, H. Ohsumi6, R. B. Pahlka, F. Perrot, F. Piquemal, P. P. Povinec, B. Richards, J. S. Ricol, C. L. Riddle, A. Rodríguez, R. Saakyan, X. Sarazin, J. K. Sedgbeer, L. Serra, Yu. Shitov, L. Simard, F. Šimkovic, S. Söldner-Rembold, I. Štekl, C. S. Sutton, Y. Tamagawa, J. Thomas, V. Timkin, V. Tretyak, Vl. I. Tretyak, V. I. Umatov, I. A. Vanyushin, R. Vasiliev, V. Vasiliev, V. Vorobel, D. Waters, N. Yahlali, A. Žukauskas

SuperNEMO Collaboration(s)

European Physical Journal C 70 (2010) 927-943

The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability to study different isotopes and track the outgoing electrons provides the means to discriminate different underlying mechanisms for the neutrinoless double beta decay by measuring the decay half-life and the electron angular and energy distributions.

Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

J. Argyriades, R. Arnold, C. Augier, J. Baker, A.S. Barabash, A. Basharina-Freshville, M. Bongrand, G. Broudin-Bay, V. Brudanin, A.J. Caffrey, A. Chapon, E. Chauveau, Z. Daraktchieva, D. Durand, V. A. Egorov, N. Fatemi-Ghomi, R. Flack, B. Guillon4, Ph. Hubert, S. Jullian, M. Kauer, S. King, A. Klimenko, O. Kochetov, S.I. Konovalov, V. V. Kovalenko, D. Lalanne, T. Lamhamdi, K. Lang, Y. Lemière, C. Longuemare, G. Lutter, F. Mamedov, Ch. Marquet, J. Martin-albo, F. Mauger, A. Nachab, I. Nasteva, I. Nemchenok, Chi-Hung Nguyen, F. Nova, P. Novella, H. Ohsumi, R.B. Pahlka, F. Perrot, F. Piquemal, J.L. Reyss, J.S. Ricol, R. Saakyan, X. Sarazin1, Yu. Shitov, L. Simard1, F. Šimkovic, A. Smolnikov, S. Snow, S. Söldner-Rembold, I. Štekl, J. Suhonen, C.S. Sutton, G. Szklarz1, J. Thomas, V. Timkin, V.I. Tretyak, V. Umatov, L. Vála, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov

NEMO Collaboration(s)

Nuclear Physics A 847 (2010) 168-179

Using 9.4 g of 96Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg y, the obtained 2νββ decay half-life measurement is View the MathML source. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2ν nuclear matrix element is extracted using the measured 2νββ half-life and is M2ν=0.049±0.002. Constraints on 0νββ decay have also been set.

Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils

J. Argyriades, R. Arnold, C. Augier, J. Baker, A. S. Barabash, A. Basharina-Freshville, M. Bongrand, C. Bourgeois, D. Breton, M. Briére, G. Broudin-Bay, V. B. Brudanin, A. J. Caffrey, S. Cebrián, A. Chapon, E. Chauveau, Th. Dafni, J. Díaz, D. Durand, V. G. Egorov, J. J. Evans, R. Flack, K-I. Fushima, I. G. Irastorza, X. Garrido, H. Gómez, B. Guillon, A. Holin, K Holy, J. J. Horkey, P. Hubert, C. Hugon, F. J. Iguaz, N. Ishihara, C. M. Jackson, S. Jenzer, S. Jullian, M. Kauer, O. I. Kochetov, S. I. Konovalov, V. V. Kovalenko, T. Lamhamdi, K. Lang, Y. Lemière, G. Lutter, G. Luzón, F. Mamedov, Ch. Marquet, F. Mauger, F. Monrabal, A. Nachab, I. B. Nemchenok, C. H. Nguyen, M. Nomachi, F. Nova, H. Ohsumi, R. B. Pahlka, F. Perrot, F. Piquemal, P. P. Povinec, B. Richards, J. S. Ricol, C. L. Riddle, A. Rodríguez, R. Saakyan, X. Sarazin1, J. K. Sedgbeer, L. Serra, Yu. A. Shitov, L. Simard1, F. Šimkovic, S. Söldner-Rembold, I. Štekl, C. S. Sutton, Y. Tamagawa, G. Szklarz1, J. Thomas, V. Timkin, V. Tretyak, Vl. I. Tretyak, V. I. Umatov, L. Vála, I. A. Vanyushin, R. Vasiliev, V. A. Vasiliev, V. Vorobel, D. Waters, N. Yahali6, A. Žukauskas, J. Hommet

SuperNEMO Collaboration(s)

Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 622 (2010) 120-128

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in 208Tl and 214Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m2 of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in 208Tl. After more than one year of background measurement, a surface activity of the scintillators of A208Tl) $ 1.5 µBq/m2 is reported here. Given this level of background, a larger BiPo detector having 12 m2 of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of A208Tl < 2 µBq/kg (90% C.L.) with a six month measurement.

Search for neutrinoless double beta decay - NEMO3 and SuperNEMO

Marquet C.

In PoS - Proceedings of Science - 35th International Conference On High Energy Physics (ICHEP2010), France (2010), 307

.

.

Reactor neutrinos, double beta and beta decays experimental review

Piquemal F.

In PoS - Proceedings of Science - 35th International Conference On High Energy Physics (ICHEP2010), France (2010), 553

.

.