Characteristics of the injected ion beam in the ECR charge breeder 1+→n+1^{+}\to n^{+}

Different ion species (rare gases, alkali, metallic) have been injected on the axis of the MINIMAFIOS - 10 GHz - Electron Cyclotron Resonance Ion Source which is the basics of the 1+ -> n+ method, special attention have been paid to the optics of the incoming beam for the validation of the 1+ -> n+ method for the SPIRAL project (Radioactive Ion Beam facility). The capture of the incoming ion beam by the ECR plasma depends, first, on the relative energy of the incoming ions with respect to the average ion energy in the plasma, and secondly, on the optics of the injection line. The efficiency of the process when varying the potential V n+ of the MINIMAFIOS source with respect to the potential V 1+ applied to the 1+ source (DV=V n+ -V 1+ ) is an image of the energy dispersion of the 1+ beam. 1+ -> n+ spectra efficiencies, DV efficiency dependence for the most efficient charge state obtained, and measured primary beam emittances are given for the Ar, Rb, Pb, Cr. Highest efficiencies obtained are respectively Ar1+ -> Ar8+ : 8.7 %, Rb1+ -> Rb15+ : 5.5 %, Pb 1+ -> Pb 22+ : 4.8 % , Cr 1+ -> Cr 12+ : 3.5 %. Last results obtained are given for Sulfur and Uranium

High Current, High frequency ECRIS development program for LHC heavy ion beam application

A research program with the aim of producing pulsed currents with hitherto unequalled intensity of Pb27+, with length and repetition ratecompatible with those desired by CERN (1 mAe / 400 ms / 10 Hz in the context of future heavy ion collisions at LHC) is organised in acollaboration between CERN/GSI/CEA-Grenoble and IN2P3-ISNG.Two main experimental programs will be carried out : (i) tests with the LNS-Catania team on the SERSE superconducting source with a 28 GHzgyrotron, (ii) tests on a non-superconducting source (new source at Grenoble) with a 28 GHz gyrotron. For this purpose CEA/DRFMC hasborrowed from CEA a 28 GHz - 10 kW gyrotron transmitter.The project includes also the construction of a source body, by ISNG, with conventional coils and permanent magnets for working at the frequencyof about 28 GHz and biased up to 60 kV. This source called PHOENIX will run on a test bench at ISN. PHOENIX is an improvement of thepresent ECR4-14.5 GHz/CERN source, having a mirror ratio R=2 at 14.5 GHz, and R=1.7 at 28 GHz (possibly reaching 2.1 T on the axis of thesource), and with a plasma volume up to 2.5 larger.Experiments at 28 GHz will be performed on the SERSE source in Catania at INFN/LNS where both the axial and the hexapolar fields will bevaried so that the mirror ratio is continuously varied up to R=1.6 ; the SERSE source will be also operated at lower magnetic fields such as thosewhich can be produced by conventional magnets (less than 2 T axial field at injection - far from the 28 GHz High-B mode)

The role of short-term memory and visuo-spatial skills in numerical magnitude processing: evidence from Turner syndrome

Peer reviewe

Cognitive Reserve and the Prevention of Dementia: the Role of Physical and Cognitive Activities

Purpose of Review: The article discusses the two most significant modifiable risk factors for dementia, namely, physical inactivity and lack of stimulating cognitive activity, and their effects on developing cognitive reserve. Recent Findings: Both of these leisure-time activities were associated with significant reductions in the risk of dementia in longitudinal studies. In addition, physical activity, particularly aerobic exercise, is associated with less age-related gray and white matter loss and with less neurotoxic factors. On the other hand, cognitive training studies suggest that training for executive functions (e.g., working memory) improves prefrontal network efficiency, which provides support to brain functioning in the face of cognitive decline. Summary: While physical activity preserves neuronal structural integrity and brain volume (hardware), cognitive activity strengthens the functioning and plasticity of neural circuits (software), thus supporting cognitive reserve in different ways. Future research should examine whether lifestyle interventions incorporating these two domains can reduce incident dementia

SPECTROSCOPIE DU 62Zn PAR REACTION 64Zn (p, t)

Les premiers niveaux excités du 62Zn ont été étudiés par réaction 64Zn (p, t) à Ep = 40 MeV. Nous avons observé cinq niveaux aux excitations de Ex = 0.95 – 1.75 – 2.20 – 2.65 et 3.10 MeV. On suggère les caractéristiques JΠ suivantes : 2+ (0.95), 2+ (1.75) et 3– (3.10 MeV).The lowest excited levels of 62Zn have been studied by 64Zn (p, t) reaction at Ep = 40 MeV. Five levels have been observed at Ex = 0.95 – 1.75 – 2.20 – 2.65 and 3.10 MeV. We suggest the following values of J, Π : 2+ (0.95), 2+ (1.75) and 3– (3.10 Mev)

LES ETATS T = 3/2 OBTENUS PAR REACTIONS 35Cl ET 37Cl (p, t) ET (p, 3He)

Nous avons étudié les réactions 35Cl et 37Cl (p, t ) et (p, 3He) en utilisant un faisceau de protons d'énergie 40 MeV. Plusieurs états analogues ont éte observés dans les noyaux résiduels.The 35Cl and 37Cl (p, t ) and (p. 3He) reactions have been studied using a 40 MeV proton beam. Isobaric analog states of final nuclei have been observed

La transformation 1+ →\rightarrow n+ : resultats et perspectives

LPSC-si

Rapport d'etape sur les mesures de rendements de transformation 1+ →\rightarrow n+

LPSC-si