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Accueil > Recherche & Enseignement

M. François Mauger

Professeur

Université de Caen Basse-Normandie

GRoupe : Interactions FOndamentales et nature du Neutrino

mauger lpccaen.in2p3.fr

TEL : +33 2 31 45 25 12


PUBLICATIONS


[hal-01582779] Search for neutrinoless quadruple-$\beta$ decay of $^{150}$Nd with the NEMO-3 detector

7 septembre 2017

We report the results of a first experimental search for lepton number violation by four units in the neutrinoless quadruple-β decay of Nd150 using a total exposure of 0.19 kg yr recorded with the NEMO-3 detector at the Modane Underground Laboratory. We find no evidence of this decay and set (...)

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[in2p3-01480194] The BiPo-3 detector for the measurement of ultra low natural radioactivities of thin materials

13 juillet 2017

The BiPo-3 detector, running in the Canfranc Underground Laboratory (Laboratorio Subterr\'aneo de Canfranc, LSC, Spain) since 2013, is a low-radioactivity detector dedicated to measuring ultra low natural radionuclide contaminations of 208Tl (232Th chain) and 214Bi (238U chain) in thin (...)

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[hal-01554847] The BiPo-3 detector

5 juillet 2017

The BiPo-3 detector is a low radioactive detector dedicated to measuring ultra-low natural contaminations of 208 Tl and 214 Bi in thin materials, initially developed to measure the radiopurity of the double β decay source foils of the SuperNEMO experiment at the μBq/kg level. The BiPo-3 technique (...)

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[in2p3-01299739] Measurement of the Double-Beta Decay Half-Life and Search for the Neutrinoless Double-Beta Decay of $^{48}{\rm Ca}$ with the NEMO-3 Detector

20 juin 2016

The NEMO-3 experiment at the Modane Underground Laboratory has investigated the double-$\beta$ decay of $^48\rm Ca$. Using $5.25$ yr of data recorded with a $6.99\,\rm g$ sample of $^48\rm Ca$, approximately $150$ double-$\beta$ decay candidate events have been selected with a (...)

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[in2p3-01166055] Result of the search for neutrinoless double-$\beta$ decay in $^{100}$Mo with the NEMO-3 experiment

9 novembre 2015

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double $\beta$ ($0\nu\beta\beta$) decay. We report final results of a search for $0\nu\beta\beta$ decays with $6.914$ kg of $^100$Mo using the entire (...)

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[in2p3-00024846] Performance of a micro-channel plates position sensitive detector

1er juillet 2015

The absolute detection efficiency of large area micro-channel plates (MCPs) detectors has been measured with $^6$Li$^+$ and $^23$Na$^+$ ions in the 0.5–7.5 keV energy range. Two detectors of 47mm and 83mm active diameter have been tested. They consist in a pair of MCPs mounted in a chevron (...)

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[hal-00012793] Transport and cooling of singly-charged noble gas ion beams

1er juillet 2015

The transport and cooling of noble gas singly-charged ion beams by means of a Radio Frequency Quadrupole Cooler Buncher (RFQCB) have been studied at the LIMBE low energy beam line of the GANIL facility. Ions as light as $^4He^+$ have been cooled and stored before their extraction in bunches (...)

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[in2p3-00023220] Technical design and performance of the NEMO 3 detector

30 juin 2015

The development of the NEMO3 detector, which is now running in the Frejus Underground Laboratory (L.S.M. Laboratoire Souterrain de Modane), was begun more than ten years ago. The NEMO3 detector uses a tracking-calorimeter technique in order to investigate double beta decay processes for several (...)

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[in2p3-00024486] First results of the search for neutrinoless double beta decay with the NEMO 3 detector

30 juin 2015

The NEMO 3 detector, which has been operating in the Frejus underground laboratory since February 2003, is devoted to the search for neutrinoless double beta decay ($\beta\beta0\nu$). Half-lives of the two neutrino double beta decays ($\beta\beta2\nu$) have been measured for $^100$Mo and (...)

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[in2p3-00020022] Possible background reductions in double beta decay experiments

30 juin 2015

The background induced by radioactive impurities of $^208\rm Tl$ and $^214\rm Bi$ in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also (...)

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[in2p3-00019880] Weak interaction studies using a Paul trap

30 juin 2015

New developments in ion cooling and ion bunching allow the trapping of radioactive ions from a low energy beam, in a very short time scale and with very good efficiency. The performances of Radio Frequency Quadrupole (RFQ) coolers, recently developed in several laboratories in Europe and USA, (...)

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[in2p3-00005048] Measurement and control of the $^{214}$Bi contamination in the beta-beta NEMO-2 experiment

30 juin 2015

The steps of territorial intelligence are based on the emergence of new fashions of exchange within the territory . It acts thus on the territorial visibility and hustles the places of strategic reflexion; by doing this, it takes part within the country, to make move the bond sociétal. This (...)

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[in2p3-00951921] Investigation of double beta decay of 100Mo to excited states of 100Ru

25 février 2014

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 (...)

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[in2p3-00912877] Search for Neutrinoless Double-Beta Decay of $^{100}$Mo with the NEMO-3 Detector

2 décembre 2013

We report the results of a search for the neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) of $^100$Mo, 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 0$\nu\beta\beta$ signal has been found, yielding a (...)

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Measurement of the 6Li charge state distributions following the 6He+ beta decay

19 novembre 2012

We measure the probability of "shake-off" ionization of the daughter nucleus in the β decay of 6He+ ions confined in a transparent Paul trap. This measurement, in good agreement with theoretical calculations, allows to reduce systematic error contributions in previous β-v correlation experiments (...)

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[in2p3-00709325] First Measurement of Pure Electron Shakeoff in the β Decay of Trapped 6He+ Ions

18 juin 2012

The electron shakeoff probability of 6Li2+ ions resulting from the β- decay of 6He+ ions has been measured with high precision using a specially designed recoil ion spectrometer. This is the first measurement of a pure electron shakeoff following nuclear β decay, not affected by multielectron (...)

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First Measurement of Pure Electron Shakeoff in the $\beta$ Decay of Trapped 6He+ Ions

18 juin 2012

The electron shakeoff probability of 6Li2+ ions resulting from the decay $\beta^-$ of 6He+ ions has been measured with high precision using a specially designed recoil ion spectrometer. This is the first measurement of a pure electron shakeoff following nuclear $\beta$ decay, not affected by (...)

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The LPCTrap experiment: measurement of the β-ν angular correlation in 6He+ decay using a transparent Paul trap

6 juillet 2011

The LPCTrap experiment is devoted to the precise measurement of the β-ν angular correlation parameter, a βν , in the pure Gamow-Teller decay of 6He+. This experiment is motivated by the search of the presence of tensor type contributions in the weak interaction. The radioactive source is confined (...)

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The LPCTrap experiment: measurement of the β-ν angular correlation in 6He+ decay using a transparent Paul trap

6 juillet 2011

The LPCTrap experiment is devoted to the precise measurement of the β-ν angular correlation parameter, a βν , in the pure Gamow-Teller decay of 6He+. This experiment is motivated by the search of the presence of tensor type contributions in the weak interaction. The radioactive source is confined (...)

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Temperature measurement of 6He + ions confined in a transparent Paul trap

6 juillet 2011

The LPCTrap setup is a transparent Paul trap dedicated to the measurement of the β-ν correlation coefficient aβν in the β decay of trapped radioactive nuclides. In a first experiment, the system has been used to record ∼105 coincidences between the β particles and recoiling ions emitted from the decay (...)

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Temperature measurement of 6He + ions confined in a transparent Paul trap

6 juillet 2011

The LPCTrap setup is a transparent Paul trap dedicated to the measurement of the β-ν correlation coefficient aβν in the β decay of trapped radioactive nuclides. In a first experiment, the system has been used to record ∼105 coincidences between the β particles and recoiling ions emitted from the decay (...)

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

10 mai 2011

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 (...)

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[in2p3-00591950] Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

10 mai 2011

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 (...)

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Measurement of the beta-nu correlation coefficient a(beta nu) in the beta decay of trapped He-6(+) ions

30 mars 2011

We have measured the β-ν angular correlation in the β decay of 6He+ ions using a transparent Paul trap. The 6He+ ions, produced at GANIL, were first cooled and bunched before being injected in the LPCTrap setup. The angular correlation was inferred from the time of flight of recoil nuclei detected (...)

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[in2p3-00581086] Measurement of the beta-nu correlation coefficient a(beta nu) in the beta decay of trapped He-6(+) ions

30 mars 2011

We have measured the β-ν angular correlation in the β decay of 6He+ ions using a transparent Paul trap. The 6He+ ions, produced at GANIL, were first cooled and bunched before being injected in the LPCTrap setup. The angular correlation was inferred from the time of flight of recoil nuclei detected (...)

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Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

3 décembre 2010

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 (...)

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[in2p3-00542775] Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

3 décembre 2010

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 (...)

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

2 novembre 2010

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 (...)

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[in2p3-00531392] Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors

2 novembre 2010

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 (...)

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Measurement of the double-β decay half-life of 150Nd and search for neutrinoless decay modes with the NEMO-3 detector

30 août 2010

The half-life for double-β decay of 150Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150Nd, we measured the half-life for 2νββ decay to be T 2ν 1/2 = (9.11+0.25 −0.22(stat.) ± 0.63(syst.)) × 1018 yr. The observed (...)

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[in2p3-00427207] Measurement of the double-β decay half-life of 150Nd and search for neutrinoless decay modes with the NEMO-3 detector

30 août 2010

The half-life for double-β decay of 150Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150Nd, we measured the half-life for 2νββ decay to be T 2ν 1/2 = (9.11+0.25 −0.22(stat.) ± 0.63(syst.)) × 1018 yr. The observed (...)

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

30 août 2010

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 (...)

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[in2p3-00511000] Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

30 août 2010

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 (...)

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

27 juillet 2010

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^208$Tl and $^214$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground (...)

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[in2p3-00506430] Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils

27 juillet 2010

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^208$Tl and $^214$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground (...)

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Beta Neutrino Correlation Measurement with Trapped Radioactive Ions

18 mai 2010

The beta-neutrino angular correlation coefficient provides a sensitive observable to search for physics beyond the standard electroweak model in nuclear beta decay. We address here the measurement of this parameter in the pure Gamow-Teller transition of 6He. A deviation from the standard model (...)

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Beta Neutrino Correlation Measurement with Trapped Radioactive Ions

18 mai 2010

The beta-neutrino angular correlation coefficient provides a sensitive observable to search for physics beyond the standard electroweak model in nuclear beta decay. We address here the measurement of this parameter in the pure Gamow-Teller transition of 6He. A deviation from the standard model (...)

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Searching for leptonic number non-conservation with NEMO-3 and SuperNEMO

19 février 2010

The NEMO 3 experiment is devoted to the search for the neutrinoless double beta decay, a leptonic number violating second order weak process which is still to be discovered. The detector has been taking data in the LSM laboratory since 2003. Latest NEMO 3 results for several double beta decay (...)

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Searching for leptonic number non-conservation with NEMO-3 and SuperNEMO

19 février 2010

The NEMO 3 experiment is devoted to the search for the neutrinoless double beta decay, a leptonic number violating second order weak process which is still to be discovered. The detector has been taking data in the LSM laboratory since 2003. Latest NEMO 3 results for several double beta decay (...)

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The LPCTrap for the measurement of the β-ν correlation in 6He

25 août 2009

The application of traps to precision measurements of the β-ν angular correlation coefficient a in nuclear β-decay is pursued by several laboratories world wide. Various nuclear transitions are addressed and different trap devices are used. At GANIL, a novel transparent Paul trap (LPCTrap) has (...)

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The LPCTrap for the measurement of the β-ν correlation in 6He

25 août 2009

The application of traps to precision measurements of the β-ν angular correlation coefficient a in nuclear β-decay is pursued by several laboratories world wide. Various nuclear transitions are addressed and different trap devices are used. At GANIL, a novel transparent Paul trap (LPCTrap) has (...)

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Measurement of the two neutrino double beta decay half-life of Zr-96 and search for associated neutrinoless processes with the NEMO-3 detector

30 juin 2009

Using 1221 days of data from the NEMO-3 detector, the measurement of Zr-96 2vbb decay half-life is [2.35 +/- 0.14(stat) +/- 0.19(syst)] x 10^19 yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular (...)

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Correlation measurement in the $\beta$ decay of trapped $^{6}$He ions

18 juin 2009

The LPCTrap facility coupled to the low-energy beam line LIRAT of the SPIRAL installation at GANIL is a transparent Paul trap designed to perform in-trap decay experiments [1]. The first detection setup installed at this facility has been designed in order to precisely determine the b-n angular (...)

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Correlation measurement in the $\beta$ decay of trapped $^{6}$He ions

18 juin 2009

The LPCTrap facility coupled to the low-energy beam line LIRAT of the SPIRAL installation at GANIL is a transparent Paul trap designed to perform in-trap decay experiments [1]. The first detection setup installed at this facility has been designed in order to precisely determine the b-n angular (...)

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Measurement of the background in the NEMO 3 double beta decay experiment

24 avril 2009

In the double beta decay experiment NEMO~3 a precise knowledge of the background in the signal region is of outstanding importance. This article presents the methods used in NEMO~3 to evaluate the backgrounds resulting from most if not all possible origins. It also illustrates the power of the (...)

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[in2p3-00378540] Measurement of the background in the NEMO 3 double beta decay experiment

24 avril 2009

In the double beta decay experiment NEMO~3 a precise knowledge of the background in the signal region is of outstanding importance. This article presents the methods used in NEMO~3 to evaluate the backgrounds resulting from most if not all possible origins. It also illustrates the power of the (...)

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Geant4 Monte Carlo simulations for the LPCTrap setup

9 avril 2009

The LPCTrap setup at GANIL is fully operational since 2006. The first breakthrough was the detection of 100000 coincidences between the β particles and the recoil ions from the decay of 6He+ produced by the SPIRAL source. After preparation, the decaying nuclei are confined in a transparent Paul (...)

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Geant4 Monte Carlo simulations for the LPCTrap setup

9 avril 2009

The LPCTrap setup at GANIL is fully operational since 2006. The first breakthrough was the detection of 100000 coincidences between the β particles and the recoil ions from the decay of 6He+ produced by the SPIRAL source. After preparation, the decaying nuclei are confined in a transparent Paul (...)

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Search for tensor couplings in the weak interaction

27 janvier 2009

The existence of exotic couplings in the weak interaction can be tested by a precise measurement of the β-ν angular correlation parameter a in nuclear beta decay. In the case of 6He, the ratio of tensor and axial-vector couplings can be determined. The goal of the LPC Trap experiment is to (...)

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Search for tensor couplings in the weak interaction

27 janvier 2009

The existence of exotic couplings in the weak interaction can be tested by a precise measurement of the β-ν angular correlation parameter a in nuclear beta decay. In the case of 6He, the ratio of tensor and axial-vector couplings can be determined. The goal of the LPC Trap experiment is to (...)

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Status of the LPCTrap facility at GANIL

10 novembre 2008

The LPCTrap is a device whose central element is a transparent Paul trap for the efficient trapping of low energy radioactive ions produced by the SPIRAL facility at GANIL. The installation comprises a linear RFQ cooler and buncher for the beam preparation, and a decay chamber where the Paul (...)

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Status of the LPCTrap facility at GANIL

10 novembre 2008

The LPCTrap is a device whose central element is a transparent Paul trap for the efficient trapping of low energy radioactive ions produced by the SPIRAL facility at GANIL. The installation comprises a linear RFQ cooler and buncher for the beam preparation, and a decay chamber where the Paul (...)

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Paul trapping of radioactive $^{6}$He+ ions and direct observation of their beta-decay

17 octobre 2008

We demonstrate that abundant quantities of short-lived beta unstable ions can be trapped in a novel transparent Paul trap and that their decay products can directly be detected in coincidence. Low energy 6He+ (807 ms half-life) ions were extracted from the SPIRAL source at GANIL, then (...)

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[in2p3-00331783] Paul trapping of radioactive $^{6}$He+ ions and direct observation of their beta-decay

17 octobre 2008

We demonstrate that abundant quantities of short-lived beta unstable ions can be trapped in a novel transparent Paul trap and that their decay products can directly be detected in coincidence. Low energy 6He+ (807 ms half-life) ions were extracted from the SPIRAL source at GANIL, then (...)

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The LPCTrap experiment: measurement of the $\beta$–ν angular correlation in $^{6}$He using a transparent Paul trap

30 novembre 2007

We report on the status of the LPCTrap experiment, devoted to measure the β–ν angular correlation in the pure Gamow–Teller decay of $^6$He. This measurement is motivated by the search for the presence of tensor type contributions to the weak interaction. The $^6$He ions are confined in a novel (...)

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The LPCTrap experiment: measurement of the $\beta$–ν angular correlation in $^{6}$He using a transparent Paul trap

30 novembre 2007

We report on the status of the LPCTrap experiment, devoted to measure the β–ν angular correlation in the pure Gamow–Teller decay of $^6$He. This measurement is motivated by the search for the presence of tensor type contributions to the weak interaction. The $^6$He ions are confined in a novel (...)

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The LPCTrap facility for in-trap decay experiments

26 juin 2007

The LPCTrap is a device devoted to the determination of the angular correlation coefficient in the nuclear beta decay of $^6$He^+$ ions by detection of the electron and the recoil ion in coincidence in a Paul trap.The LPCTrap facility comprises an RFQ trap for beam preparation and a transparent (...)

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The LPCTrap facility for in-trap decay experiments

26 juin 2007

The LPCTrap is a device devoted to the determination of the angular correlation coefficient in the nuclear beta decay of $^6$He^+$ ions by detection of the electron and the recoil ion in coincidence in a Paul trap.The LPCTrap facility comprises an RFQ trap for beam preparation and a transparent (...)

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Limits on different Majoron decay modes of 100Mo and 82Se for neutrinoless double beta decays in the NEMO-3 experiment

5 février 2007

The NEMO-3 tracking detector is located in the Frejus Underground Laboratory. It was designed to study double beta decay in a number of different isotopes. Presented here are the experimental half-life limits on the double beta decay process for the isotopes 100Mo and 82Se for different Majoron (...)

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[in2p3-00129100] Limits on different Majoron decay modes of 100Mo and 82Se for neutrinoless double beta decays in the NEMO-3 experiment

5 février 2007

The NEMO-3 tracking detector is located in the Frejus Underground Laboratory. It was designed to study double beta decay in a number of different isotopes. Presented here are the experimental half-life limits on the double beta decay process for the isotopes 100Mo and 82Se for different Majoron (...)

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Simulation of double beta Decay in the "SeXe" TPC

16 janvier 2007

In 2003, the NEMO collaboration has begun some preliminary studies for a next-generation double beta decay experiment : SuperNEMO. The possibility to use a large gaseous TPC has been investigated using simulation and extrapolation of former experiments. In this talk, I will report on the (...)

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Simulation of double beta Decay in the "SeXe" TPC

16 janvier 2007

In 2003, the NEMO collaboration has begun some preliminary studies for a next-generation double beta decay experiment : SuperNEMO. The possibility to use a large gaseous TPC has been investigated using simulation and extrapolation of former experiments. In this talk, I will report on the (...)

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

16 octobre 2006

The double beta decay of 100Mo to the 0+1 and 2+1 excited states of 100Ru 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 100Mo to the excited 0+1 state is measured to be T(2nu)_1/2 = [5.+1.3-0.9(stat)+/-0.8(syst)]x (...)

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[in2p3-00106943] Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

16 octobre 2006

The double beta decay of 100Mo to the 0+1 and 2+1 excited states of 100Ru 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 100Mo to the excited 0+1 state is measured to be T(2nu)_1/2 = [5.+1.3-0.9(stat)+/-0.8(syst)]x (...)

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The LPCTrap facility for in-trap decay experiments

26 septembre 2006

The LPCTrap facility is coupled to the low-energy beam line LIRAT of the SPIRAL source at GANIL (France). The facility comprises an RFQ trap for beam preparation and a transparent Paul trap for in-trap decay studies. The system has been tested for several ion species. The Paul trap has been (...)

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The LPCTrap facility for in-trap decay experiments

26 septembre 2006

The LPCTrap facility is coupled to the low-energy beam line LIRAT of the SPIRAL source at GANIL (France). The facility comprises an RFQ trap for beam preparation and a transparent Paul trap for in-trap decay studies. The system has been tested for several ion species. The Paul trap has been (...)

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Measurement of the β−ν correlation in 6He using a transparent Paul trap

15 septembre 2006

The angular correlationbetween the electron and the neutrino in nuclear β−decay constitutes a sensitive observable to search for the existence of exotic couplings in the weak interaction. In this contribution, we describe the progress of the LPCTrap experiment, devoted to measure the β−ν angular (...)

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Measurement of the β−ν correlation in 6He using a transparent Paul trap

15 septembre 2006

The angular correlationbetween the electron and the neutrino in nuclear β−decay constitutes a sensitive observable to search for the existence of exotic couplings in the weak interaction. In this contribution, we describe the progress of the LPCTrap experiment, devoted to measure the β−ν angular (...)

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Linear radio frequency quadrupole for the cooling and bunching of radioactive ion beams

8 septembre 2006

A linear radio frequency quadrupole has been built for the transport, cooling, and bunching of radioactive ions extracted from an ECR source. The device uses the buffer gas cooling technique and was designed such as to extend the technique for the cooling of very light ions using H2 as buffer (...)

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[in2p3-00092266] Linear radio frequency quadrupole for the cooling and bunching of radioactive ion beams

8 septembre 2006

A linear radio frequency quadrupole has been built for the transport, cooling, and bunching of radioactive ions extracted from an ECR source. The device uses the buffer gas cooling technique and was designed such as to extend the technique for the cooling of very light ions using H2 as buffer (...)

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The LPCTrap facility: A novel transparent Paul trap for high-precision experiments

7 septembre 2006

A trap system has been built to perform high-precision β-decay experiments. The system is coupled to the low-energy beam line of the SPIRAL source at GANIL. The continuous ion beam from SPIRAL with energies between 10 and 20 keV is slowed down by means of a buffer-gas-filled RFQ trap and ejected (...)

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[in2p3-00091845] The LPCTrap facility: A novel transparent Paul trap for high-precision experiments

7 septembre 2006

A trap system has been built to perform high-precision β-decay experiments. The system is coupled to the low-energy beam line of the SPIRAL source at GANIL. The continuous ion beam from SPIRAL with energies between 10 and 20 keV is slowed down by means of a buffer-gas-filled RFQ trap and ejected (...)

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The LPCTrap for the measurement of the $\beta$-v correlation in $^{6}$He

8 novembre 2005

The application of traps to precision measurements of the $\beta$-ν angular correlation coefficient a in nuclear $\beta$-decay is pursued by several laboratories world wide. Various nuclear transitions are addressed and different trap devices are used. At GANIL, a novel transparent Paul trap (...)

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The LPCTrap for the measurement of the $\beta$-v correlation in $^{6}$He

8 novembre 2005

The application of traps to precision measurements of the $\beta$-ν angular correlation coefficient a in nuclear $\beta$-decay is pursued by several laboratories world wide. Various nuclear transitions are addressed and different trap devices are used. At GANIL, a novel transparent Paul trap (...)

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Transport and cooling of singly-charged noble gas ion beams

27 octobre 2005

The transport and cooling of noble gas singly-charged ion beams by means of a Radio Frequency Quadrupole Cooler Buncher (RFQCB) have been studied at the LIMBE low energy beam line of the GANIL facility. Ions as light as $^4He^+$ have been cooled and stored before their extraction in bunches (...)

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Transport and cooling of singly-charged noble gas ion beams

27 octobre 2005

The transport and cooling of noble gas singly-charged ion beams by means of a Radio Frequency Quadrupole Cooler Buncher (RFQCB) have been studied at the LIMBE low energy beam line of the GANIL facility. Ions as light as $^4He^+$ have been cooled and stored before their extraction in bunches (...)

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Performance of a micro-channel plates position sensitive detector

10 octobre 2005

The absolute detection efficiency of large area micro-channel plates (MCPs) detectors has been measured with $^6$Li$^+$ and $^23$Na$^+$ ions in the 0.5–7.5 keV energy range. Two detectors of 47mm and 83mm active diameter have been tested. They consist in a pair of MCPs mounted in a chevron (...)

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

23 août 2005

The NEMO 3 detector, which has been operating in the Frejus underground laboratory since February 2003, is devoted to the search for neutrinoless double beta decay ($\beta\beta0\nu$). Half-lives of the two neutrino double beta decays ($\beta\beta2\nu$) have been measured for $^100$Mo and (...)

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Measurements of the $\beta nu$ angular correlation in nuclear $\beta$-decay

26 avril 2005

The angular correlation between the electron and the neutrino in nuclear β-decay constitutes a sensitive observable to search for exotic couplings in the weak interaction. This correlation provides also an alternative means to determine the ratio between the Gamow-Teller and Fermi contributions (...)

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Technical design and performance of the NEMO 3 detector

13 octobre 2004

The development of the NEMO3 detector, which is now running in the Frejus Underground Laboratory (L.S.M. Laboratoire Souterrain de Modane), was begun more than ten years ago. The NEMO3 detector uses a tracking-calorimeter technique in order to investigate double beta decay processes for several (...)

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Possible background reductions in double beta decay experiments

15 mai 2003

The background induced by radioactive impurities of $^208\rm Tl$ and $^214\rm Bi$ in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also (...)

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Weak interaction studies using a Paul trap

19 août 2002

New developments in ion cooling and ion bunching allow the trapping of radioactive ions from a low energy beam, in a very short time scale and with very good efficiency. The performances of Radio Frequency Quadrupole (RFQ) coolers, recently developed in several laboratories in Europe and USA, (...)

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