# Laboratoire de Physique Corpusculaire de Caen

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LPC CAEN
ENSICAEN
6, bd du Maréchal Juin
14050 CAEN Cedex
Tel : +033 (0) 231452500

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## Publications

(more recent)

29 novembre 2016

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### [in2p3-01337513] Ultracold neutron detection with 6Li-doped glass scintillators, NANOSC: a fast ultracold neutron detector for the nEDM experiment at the Paul Scherrer Institute

2 novembre 2016

This paper summarizes the results from measurements aiming to characterize ultracold neutron detection with 6Li-doped glass scintillators. Single GS10 or GS20 scintillators, with a thickness of 100-200 micrometer, fulfill the ultracold neutron detection requirements with an acceptable (...)

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12 octobre 2016

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### [in2p3-01377559] First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

7 octobre 2016

The first high-statistics and high-resolution data set for the integrated recoil-ion energy spectrum following the decay of 35Ar has been collected with the WITCH retardation spectrometer located at CERN-ISOLDE. Over 25 million recoil-ion events were recorded on a large-area multichannel plate (...)

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### [in2p3-01323815] High accuracy position response calibration method for a micro-channel plate ion detector

6 octobre 2016

We have developed a position response calibration method for a micro-channel plate (MCP) detector with a delay-line anode position readout scheme. Using an \em in situ calibration mask, an accuracy of 8~$\mu$m and a resolution of 85~$\mu$m (FWHM) have been achieved for MeV-scale $\alpha$ (...)

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### [in2p3-01373000] The neutrons for science facility at SPIRAL-2

29 septembre 2016

Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutrons with energies between a few MeV and a few tens of MeV. Reliable measurements are necessary to improve the evaluated databases used by nuclear transport codes. It concerns a (...)

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30 juillet 2016

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### [in2p3-01348876] Status of the SOLID Experiment

27 juillet 2016

The aim of the SoLid experiment is to provide the precise measurement of the anti-neutrino energy spectrum from a highly enriched uranium reactor, and then, perform sensitive search for short baseline neutrino oscillation. The objectives are to resolve the reactor neutrino anomaly and to test (...)

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2 juillet 2016

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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

28 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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28 juin 2016

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### [in2p3-01294692] Atomic Site-Sensitive Processes in Slow Ar9+-Ar2 Collisions

28 juin 2016

Electron capture processes for low energy Ar9+ ions colliding on argon dimer targets are investigated, focusing attention on charge sharing between the two argon atoms as a function of the molecular orientation and the impact parameter. Confrontation between experimental results and MC-COBM (...)

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### [in2p3-01294686] Interatomic Coulombic decay in low energy ion-dimer collisions

28 juin 2016

Low energy collisions between ions and neon dimers are investigated, focusing attention on the dissociation of the ionized molecular target. The results show a clear dependance of the processes with the projectile charge state and an unexpected appearance of inner-shell single electron capture (...)

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28 juin 2016

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### [in2p3-01278441] Developments towards in-gas-jet laser spectroscopy studies of actinium isotopes at LISOL

28 juin 2016

To study exotic nuclides at the borders of stability with laser ionization and spectroscopy techniques, highest efficiencies in combination with a high spectral resolution are required. These usually opposing requirements are reconciled by applying the in-gas-laser ionization and spectroscopy (...)

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### [in2p3-01258808] Search for a scalar component in the weak interaction

28 juin 2016

Weak interactions are described by the Standard Model which uses the basic assumption of a pure “V(ector)-A(xial vector)” character for the interaction. However, after more than half a century of model development and experimental testing of its fundamental ingredients, experimental limits for (...)

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28 juin 2016

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### [in2p3-01213959] Laser trapped $^{6}He$ as a probe of the weak interaction and a test of the sudden approximation

5 janvier 2016

Synopsis Correlations between β decay products are sensitive observables to look for exotic contributions to the weak interaction excluded by the Standard Model of particle physics. To precisely measure the β − ν angular correlation parameter, a βν , in 6 He β decay, the radioactive atoms are trapped (...)

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### [in2p3-01213941] A highly stable atomic vector magnetometer based on free spin precession

5 janvier 2016

We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of a 1 $\mu$T magnetic field. Multiple circularly polarized laser beams were used to probe the free spin precession of the Cs atoms. The design was optimized for long-time stability and (...)

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### [in2p3-01140188] Measurement of a false electric dipole moment signal from $^{199}$Hg atoms exposed to an inhomogeneous magnetic field

18 novembre 2015

We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for $^199\rm Hg$ atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises from the interplay between the inevitable magnetic field gradients and the (...)

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### [in2p3-01120938] A device for simultaneous spin analysis of ultracold neutrons

18 novembre 2015

We report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components. The device was developed in the framework of the neutron electric dipole moment experiment at the Paul Scherrer (...)

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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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### [in2p3-01199753] A revised experimental upper limit on the electric dipole moment of the neutron

6 novembre 2015

We present for the first time a detailed and comprehensive analysis of the experimental results that set the current world sensitivity limit on the magnitude of the electric dipole moment (EDM) of the neutron. We have extended and enhanced our earlier analysis to include recent developments in (...)

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### [in2p3-01159876] Observation of gravitationally induced vertical striation of polarized ultracold neutrons by spin-echo spectroscopy

19 octobre 2015

We describe a spin-echo method for ultracold neutrons (UCNs) confined in a precession chamber and exposed to a $|B_0|=1~\text\mu T$ magnetic field. We have demonstrated that the analysis of UCN spin-echo resonance signals in combination with knowledge of the ambient magnetic field provides an (...)

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### [in2p3-01169555] Gravitational depolarization of ultracold neutrons: Comparison with data

9 octobre 2015

We compare the expected effects of so-called gravitationally enhanced depolarization of ultracold neutrons to measurements carried out in a spin-precession chamber exposed to a variety of vertical magnetic-field gradients. In particular, we have investigated the dependence upon these field (...)

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7 octobre 2015

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### [in2p3-01192584] Optimizing charge breeding techniques for ISOL facilities in Europe: conclusions from the EMILIE project

7 octobre 2015

The present paper summarizes the results obtained from the past few years in the framework of the Enhanced Multi-Ionization of short-Lived Isotopes for Eurisol (EMILIE) project. The EMILIE project aims at improving the charge breeding techniques with both Electron Cyclotron Resonance Ion (...)

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### [in2p3-01177776] Experimental study of a high intensity radio-frequency cooler

23 juillet 2015

Within the framework of the DESIR/SPIRAL-2 project, a radio-frequency quadrupole cooler named SHIRaC has been studied. SHIRaC is a key device of SPIRAL-2, designed to enhance the beam quality required by DESIR. The preliminary study and development of this device has been carried out at (...)

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### [in2p3-01179076] Precision measurements with LPCTrap at GANIL

23 juillet 2015

The experimental achievements and the results obtained so far with the LPCTrap device installed at GANIL are presented. The apparatus is dedicated to the study of the weak interaction at low energy by means of precise measurements of the – angular correlation parameter in nuclear  decays. So (...)

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### [in2p3-01177619] The Billotron: a way to experimentally apprehend the subatomic world

18 juillet 2015

The Billotron is a device designed and built by the LPC Caen to illustrate the methods with which physicists are able to study the basic structure of matter, in particular the nucleus of the atom.

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### [in2p3-01176181] Primary processes: from atoms to diatomic molecules and clusters

16 juillet 2015

This article presents a short review of the main progresses achieved at the GANIL facilities during the last thirty years in the field of ion-atom and ion-diatomic molecule collisions. Thanks to the wide range of projectile energies and species available on the different beam lines of the (...)

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### [in2p3-00829300] Current progress and future plans of the FREYA Project

1er juillet 2015

Reactor physics experiments are required for the design of a Fast Spectrum Transmutation Experimental Facility MYRRHA/FASTEF working in subcritical mode and in critical mode. Reactor physics experiments aim to validate a methodology for on-line subcriticality monitoring. For this purpose, (...)

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### [in2p3-00829301] Reactivity monitoring using the area method for the subcritical VENUS-F core within the framework of the FREYA Project

1er juillet 2015

Accelerator-Driven Systems (ADS) could be employed to incinerate minor actinides and so partly contribute to answer the problem of nuclear waste management. An ADS consists of the coupling of a subcritical fast reactor to a particle accelerator via a heavy material spallation target. The (...)

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1er juillet 2015

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1er juillet 2015

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1er juillet 2015

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1er juillet 2015

The neutron gyromagnetic ratio has been measured relative to that of the 199Hg atom with an uncertainty of 0.8 ppm. We employed an apparatus where ultracold neutrons and mercury atoms are stored in the same volume and report the result $\gamma_\rm n/\gamma_\rm Hg = (...) Lire la suite ### [in2p3-01133535] Space-charge effects in Penning ion traps 1er juillet 2015 The influence of space-charge on ion cyclotron resonances and magnetron eigenfrequency in a gas-filled Penning ion trap has been investigated. Off-line measurements with 39 K + using the cooling trap of the WITCH retardation spectrometer-based setup at ISOLDE / CERN were performed. Experimental (...) Lire la suite ### [in2p3-01133546] Simulations of high intensity ion beam RFQ cooler for DESIR/SPIRAL 2: SHIRaC 1er juillet 2015 SHIRaC is a buffer gas radiofrequency quadrupole cooler, part of SPIRAL 2 facility, at GANIL in France. It is designed to cool low energy ion beams with emittances up to 80 pi.mm.mrad and currents up to 1 mu A. It is devoted to reduce the beam parameters; less than 3 pi.mm.mrad of emittance and (...) Lire la suite ### [in2p3-01138492] Lorentz invariance violation in weak interaction: search for effects in beta decay of polarized neutrons 1er juillet 2015 [...] Lire la suite ### [in2p3-01138502] Electronics for the SuperNEMO experiment, with focus on Control and ReadOut 1er juillet 2015 SuperNEMO (SN) is the next-generation neutrinoless double beta decay (0νββ) experiment based on a tracking plus calorimetry technique. The construction of the demonstrator module has started in 2013 and its installation is expected in 2014 in LSM underground laboratory (France). The SN experiment (...) Lire la suite ### [in2p3-00842660] Fundamental interaction review 30 juin 2015 [...] Lire la suite ### [in2p3-01095701] In trap polarization of radioactive ion beams 30 juin 2015 [...] Lire la suite ### [in2p3-01073828] Precision measurements with LPCTrap at GANIL 30 juin 2015 [...] Lire la suite ### [in2p3-00682613] Atomic-matter-wave diffraction evidenced in low-energy Na++Rb charge-exchange collisions 30 juin 2015 Single charge transfer in low-energy Na++87Rb(5s,5p) collisions is investigated using magneto-optically trapped Rb atoms and high-resolution recoil-ion momentum spectroscopy. The three-dimensional reconstruction of the recoil-ion momentum provides accurate relative cross sections for the active (...) Lire la suite ### [in2p3-00676874] Undergraduate research opportunities in neutron activation analysis for local, regional and international students 30 juin 2015 Neutron activation analysis (NAA) remains an excellent technique to introduce undergraduate students to nuclear science and engineering coming from different academic areas. The NAA methods encompass an appreciation of basic reactor engineering concepts, radiation safety, nuclear (...) Lire la suite ### [in2p3-00690445] Measurement of the transverse polarization of electrons emitted in free neutron decay 30 juin 2015 The final analysis of the experiment determining both components of the transverse polarization of electrons (σT1, σT2) emitted in the β decay of polarized, free neutrons is presented. The T-odd, P-odd correlation coefficient quantifying σT2, perpendicular to the neutron polarization and electron (...) Lire la suite ### [in2p3-00823240] An endoscopic detector for ultracold neutrons 30 juin 2015 A new versatile detector for ultracold neutrons (UCN) has been built and operated which combines multi-pixel photon counters and GS10 lithium-doped scintillators. Such detectors can be very small and can be used to monitor UCN inside storage vessels or guides with negligible influence (of order (...) Lire la suite ### [in2p3-00835364] High resolution probe of coherence in low-energy charge exchange collisions with oriented targets 30 juin 2015 The trapping lasers of a magneto-optical trap (MOT) are used to bring Rb atoms into well defined oriented states. Coupled to recoil-ion momentum spectroscopy (RIMS), this yields a unique MOTRIMS setup which is able to probe scattering dynamics, including their coherence features, with (...) Lire la suite ### [in2p3-00868612] Electron shakeoff following the Β+ decay of trapped 35Ar+ ions 30 juin 2015 The electron shakeoff of$^35$Cl atoms resulting from the$\beta^+$decay of$^35$Ar$^+$ions has been investigated using a Paul trap coupled to a recoil-ion spectrometer. The charge-state distribution of the recoiling daughter nuclei is compared to theoretical calculations accounting for (...) Lire la suite ### [in2p3-00960923] Simulation of ion behavior in an open three-dimensional Paul trap using a power series method 30 juin 2015 Simulations of the dynamics of ions trapped in a Paul trap with terms in the potential up to the order 10 have been carried out. The power series method is used to solve numerically the equations of motion of the ions. The stability diagram has been studied and the buffer gas cooling has been (...) Lire la suite ### [in2p3-01090724] Measurement of the parameter xi" in polarized muon decay and Implications on exotic couplings of the leptonic weak interaction 30 juin 2015 The muon decay parameter ξ'' has been determined in a measurement of the longitudinal polarization of positrons emitted from polarized and depolarized muons. The result, ξ''=0.981±0.045stat±0.003syst, is consistent with the Standard Model prediction of unity, and provides an order of magnitude (...) Lire la suite ### [in2p3-00709325] First Measurement of Pure Electron Shakeoff in the β Decay of Trapped 6He+ Ions 30 juin 2015 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 (...) Lire la suite ### [in2p3-00834132] Energy-dependent relative charge transfer cross sections of Cs+ + Rb(5s, 5p) 30 juin 2015 Magneto optical trap recoil ion momentum spectroscopy is used to measure energy-dependent charge exchange cross sections in the Cs+ + Rb(5s, 5p) system over a range of projectile energies from 3.2 to 6.4 keV. The measurements are kinematically complete and yield cross sections that are (...) Lire la suite ### [in2p3-01109546] Reactivity Measurements at GUINEVERE Facility Using the Integral kp Method 30 juin 2015 In the framework of the GUINEVERE (EUROTRANS-IP FP6) and FREYA (FP7) projects, a two-level procedure is developed to measure the time variations of an ADS reactivity ρ(t). First, the time variations of the reactor power and neutron source intensity are monitored online, allowing to extract the (...) Lire la suite ### [in2p3-01079961] Interatomic Coulombic Decay as a New Source of Low Energy Electrons in slow Ion-Dimer Collisions 30 juin 2015 We provide the experimental evidence that the single electron capture process in slow collisions between O$^3+$ions and neon dimer targets leads to an unexpected production of low-energy electrons. This production results from the interatomic Coulombic decay process, subsequent to inner shell (...) Lire la suite ### [in2p3-01144635] Study of Space-energy Effects in Subcritical Reactor within a Time-dependent Multi-group 1-Dimensional Diffusion Approach 30 juin 2015 The GUINEVERE facility hosted at the SCK·CEN site in Mol (Belgium) couples the fast subcritical lead reactor VENUS-F with an external neutron source provided by interactions of deuterons delivered by the GENEPI-3C accelerator and a tritiated target located at the reactor core center. Part of the (...) Lire la suite ### [in2p3-01158512] Constraining interactions mediated by axion-like particles with ultracold neutrons 30 juin 2015 We report a new limit on a possible short range spin-dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and Hg-199 atoms confined in the same volume. The measurement was performed in a similar to 1 mu T vertical magnetic (...) Lire la suite ### [in2p3-00523702] Some highlights of experimental ADS programs in Europe 30 juin 2015 [...] Lire la suite ### [in2p3-01110087] Preferential near site electron capture in low energy ion-dimer collisions 30 juin 2015 [...] Lire la suite ### [in2p3-00578468] Tests of symmetries with nuclei 30 juin 2015 I review here the status of tests of discrete symmetries in nuclear beta decay, including neutron decay. The focus is given on tests of maximal parity violation, tests of time reversal invariance as well as searches for parity and time reversal invariant exotic interactions. Along with the most (...) Lire la suite ### [in2p3-00529270] Shell and shapes in the$^{44}S nucleus

30 juin 2015

The results obtained from electron and in-beam spectroscopy experiments reveal that the 44S nucleus is located in a transitional region between the spherical 48Ca and the oblate 42Si. The comparison of the results with Large Scale Shell Model calculations points towards prolate-spherical shape (...)

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### [in2p3-00619633] Nuclear reaction measurements of 95MeV/u 12C interactions on PMMA for hadrontherapy

30 juin 2015

The ion dose deposition in tissues is characterized by a favorable depth dose profile (i.e. Bragg peak) and a small lateral spread. In order to keep these benefits of ions in cancer treatments, a very high accuracy is required on the dose deposition (±3%). For given target stoechiometry and (...)

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### [in2p3-00619310] Spectroscopy of 39,41Si and the border of the N = 28 island of inversion

30 juin 2015

The structure of the very neutron-rich nuclei 39Si and 41Si has been investigated via in-beam γ -ray spectroscopy and few-nucleon knockout from radioactive beams. The observation of low-lying states in 39Si is a clear evidence for a drastic lowering of the intruder neutron 3/2− state when going (...)

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### [in2p3-00753576] Study of low energy ion-atom collisions using a magneto-optical trap

30 juin 2015

A magneto-optical trap (MOT) has been coupled to a recoil-ion momentum spectrometer to study the charge exchange process in Na+ +87Rb collisions in the keV impact energy range. The relative cross sections of the active charge exchange channels and the associated distributions in scattering (...)

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### [in2p3-00753591] Measurement of the 6Li charge state distributions following the 6He+ beta decay

30 juin 2015

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 (...)

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### [in2p3-00602885] Production and Separation of T = 1/2 Nuclides for $\beta$ $\nu$ angular correlation measurements

30 juin 2015

The SPIRAL facility at GANIL, which uses the so-called ISOL method to produce radioactive ion beams, is being upgraded to extend its production capabilities to the metallic beams of neutron deficient isotopes. We discuss here the potentialities offered by this upgrade for the measurement of the (...)

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### [in2p3-00658478] The Neutrons for Science Facility at SPIRAL‐2

30 juin 2015

The "Neutrons for Science" (NFS) facility will be a component of SPIRAL‐2, the future accelerator dedicated to the production of very intense radioactive ion beams, under construction at GANIL in Caen (France). NFS will be composed of a pulsed neutron beam for in‐flight measurements and (...)

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30 juin 2015

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30 juin 2015

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30 juin 2015

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30 juin 2015

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30 juin 2015

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30 juin 2015

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30 juin 2015

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### [in2p3-00797422] The Neutrons For Science facility at SPIRAL-2

30 juin 2015

The Neutrons For Science (NFS) facility is a component of SPIRAL-2 laboratory under construction at Caen (France). SPIRAL-2 is dedicated to the production of high intensity Radioactive Ions Beams (RIB). It is based on a high-power linear accelerator (LINAG) to accelerate deuterons beams in (...)

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### [in2p3-01109528] An Alternative Source Jerk Method Implementation for the Subcriticality Estimation of the VENUS-F Subcritical Core in the FREYA Project

30 juin 2015

As a prolongation of the FP-6 GUINEVERE (Generation of Uninterrupted Intense NEutron pulses at the lead VEnus REactor) project at the VENUS-F facility at SCK• CEN, the FP-7 FREYA (Fast Reactor Experiments for hYbrid Applications) project was launched in 2011. The FREYA project aims at validating (...)

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### [in2p3-01104281] Using GPU parallelization to perform realistic simulations of the LPCTrap experiments

30 juin 2015

The LPCTrap setup is a sensitive tool to measure the β − ν angular correlation coefficient, a β ν , which can yield the mixing ratio ρ of a β decay transition. The latter enables the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V u d . In such a measurement, the most relevant (...)

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30 juin 2015

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30 juin 2015

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### [in2p3-00588817] Free neutron decay and time reversal violation

30 juin 2015

Both components of the transverse electron polarization have been measured in free neutron decay. The T-odd, P-odd correlation coefficient associated with polarization component perpendicular to the neutron polarization and electron momentum, was found to be R = 0:006 (symb) 0:012 (symb) 0:005. (...)

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30 juin 2015

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### [in2p3-00523395] Testing isotropy of the universe using the Ramsey resonance technique on ultracold neutron spins

30 juin 2015

Physics at the Planck scale could be revealed by looking for tiny violations of fundamental symmetries in low energy experiments. In 2008, a sensitive test of the isotropy of the Universe using has been performed with stored ultracold neutrons (UCN), this is the first clock-comparison (...)

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30 juin 2015

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

30 juin 2015

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

30 juin 2015

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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30 juin 2015

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### [in2p3-00622166] Prospects for advanced electron cyclotron resonance and electron beam ion source charge breeding methods for EURISOL

30 juin 2015

As the most ambitious concept of isotope separation on line (ISOL) facility, EURISOL aims at producing unprecedented intensities of post-accelerated radioactive isotopes. Charge breeding, which transforms the charge state of radioactive beams from 1+ to an n+ charge state prior to (...)

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30 juin 2015

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### [in2p3-00785495] Weak Interaction Studies with 6He

30 juin 2015

The 6He nucleus is an ideal candidate to study the weak interaction. To this end we have built a high-intensity source of 6He delivering ~10^10 atoms/s to experiments. Taking full advantage of that available intensity we have performed a high-precision measurement of the 6He half-life that (...)

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### [in2p3-00846623] Publisher's Note: In-beam spectroscopic studies of the 44S nucleus [Phys. Rev. C 85, 024311 (2012)]

30 juin 2015

This paper was published online on 15 February 2012 with errors in Figs. 2 and 4. The figures has been replaced as of 28 February 2012. The figures are correct in the printed version of the journal.

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30 juin 2015

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30 juin 2015

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### [in2p3-00857340] In gas laser ionization and spectroscopy experiments at the Superconducting Separator Spectrometer (S3): Conceptual studies and preliminary design

30 juin 2015

The results of preparatory experiments and the preliminary designs of a new in-gas laser ionization and spectroscopy setup, to be coupled to the Super Separator Spectrometer S3 of SPIRAL2-GANIL, are reported. Special attention is given to the development and tests to carry out a full (...)

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30 juin 2015

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### [in2p3-00843506] Precision measurements in nuclear β-decay with LPCTrap

30 juin 2015

The experimental achievements and the current program with the LPCTrap device installed at the LIRAT beam line of the SPIRAL1-GANIL facility are presented. The device is dedicated to the study of the weak interaction at low energy by means of precise measurements of the β−ν angular correlation (...)

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30 juin 2015

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### [in2p3-00601804] Medley spectrometer for light ions in neutron-induced reactions at 175 MeV

30 juin 2015

We have upgraded the Medley spectrometer to measure neutron-induced double differential cross-sections for light-ion production, with neutron energies up to 175 MeV. Measurements were performed at the quasi-monoenergetic neutron beam line at the The Svedberg Laboratory, in Uppsala (Sweden). (...)

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30 juin 2015

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

30 juin 2015

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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30 juin 2015

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30 juin 2015

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### [in2p3-01062292] Dynamic stabilization of the magnetic field surrounding the neutron electric dipole moment spectrometer at the Paul Scherrer Institute

30 juin 2015

The Surrounding Field Compensation (SFC) system described in this work is installed around the four-layer Mu-metal magnetic shield of the neutron electric dipole moment spectrometer located at the Paul Scherrer Institute. The SFC system reduces the DC component of the external magnetic field by (...)

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### [in2p3-00657202] In-beam spectroscopic studies of $^{44}$S nucleus

30 juin 2015

The structure of the $^44$S nucleus has been studied at GANIL through the one proton knock-out reaction from a $^45$Cl secondary beam at 42~A$\cdot$MeV. The $\gamma$ rays following the de-excitation of $^44$S were detected in flight using the 70 BaF$_2$ detectors of the Ch\^ateau de Cristal (...)

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30 juin 2015

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### [in2p3-00989772] Atomic site sensitive processes in low energy ion-dimer collisions

30 juin 2015

Electron capture processes for low energy Ar9+ ions colliding on Ar2 dimer targets are investigated, focusing attention on charge sharing as a function of molecule orientation and impact parameter. A preference in charge-asymmetric dissociation channels is observed, with a strong correlation (...)

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

30 juin 2015

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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### [in2p3-01109518] Reactivity Measurement of the Lead Fast Subcritical VENUS-F Reactor Using Beam Interruption Experiments

30 juin 2015

In order to incinerate minor actinides and thus to reduce the issues linked to nuclear waste management, Accelerator-Driven Systems (ADS) are being under study. An ADS consists in the coupling of a particle accelerator with a sub-critical fast reactor. The on-line reactivity monitoring is a (...)

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