9 research outputs found
Shape study of the N = Z nucleus Kr-72 via beta decay
10 pags.; 11 figs.; 2 tabs.; PACS number(s): 23.40.Hc, 29.30.Kv, 27.50.+e, 21.10.Pc; Open Access funded by Creative Commons Atribution Licence 3.0The beta decay of the N = Z nucleus Kr-72 has been studied with the total absorption spectroscopy technique at ISOLDE (CERN). A total B(GT) = 0.79(4)g(A)(2)/4 pi has been found up to an excitation energy of 2.7 MeV. The B(GT) distribution obtained is compared with predictions from state-of-the-art theoretical calculations to learn about the ground state deformation of Kr-72. Although a dominant oblate deformation is suggested by direct comparison with quasiparticle random phase approximation (QRPA) calculations, beyond-mean-field and shell-model calculations favor a large oblate-prolate mixing in the ground state. Published by the American Physical SocietyJ.A.B. acknowledges the predoctoral grant BES-2008-009412
associated with the research project FPA2007-62170 funded
by Ministerio de Ciencia e Innovacion (Spain). This work has ÂŽ
been partly supported by the Spanish Ministerio de EconomĂa
y Competitividad (MINECO) through projects FPA2012-
32443, FPA2011-24553, FPA2011-29854-C04-01, FPA2013-
41267-P, FPA2014-52823-C2-1-P and FIS2011-23565, by
STFC-UK (Grant No. ST/F012012/1) and by the European
Union by means of the European Commission within its
Seventh Framework Programme (FP7) via ENSAR (Contract
No. 262010)Peer Reviewe
LâĂ©volution rĂ©cente et lâavenir du mutualisme dans le domaine de la santĂ© en France
The recent evolution of mutual health insuring in France
In France three actors - mutual firms, contingency fund and insurance companies - complete the French SĂ©curitĂ© sociale benefits. They play a major role for the evolution of the whole system of social welfare and health. For a long time, we believed that the State played the most important role, we now notice that each of present actors has a strategic position. Even if they seem to be marginal, what their role can be decisive on the setâs evolution. In the health field, the mutual solidarity logic is determining for all the system.
JEL classifications : G22, L2En France trois acteurs - la mutualitĂ©, les institutions de prĂ©voyance et les assurances - agissent en complĂ©ment du rĂ©gime de SĂ©curitĂ© sociale. Le « complĂ©mentaire » est souvent envisagĂ© comme un enjeu secondaire. En rĂ©alitĂ©, il joue un rĂŽle premier pour lâĂ©volution de lâensemble du systĂšme de protection sociale et de santĂ©. AprĂšs avoir longtemps cru que lâĂtat jouait le rĂŽle de chef dâorchestre, on sâaperçoit Ă prĂ©sent que chacun des acteurs prĂ©sents dans le systĂšme a une position de stratĂšge. MĂȘme sâil est apparemment marginal, ce quâil fait peut ĂȘtre dĂ©cisif sur lâĂ©volution de lâensemble. Dans le domaine de la santĂ©, le fait que la mutualitĂ© puisse imprimer sa logique solidaire et sa politique dâaction sur les risques est dĂ©terminant pour tout le systĂšme.
Classification JEL : G22, L2Le Scornet Daniel. LâĂ©volution rĂ©cente et lâavenir du mutualisme dans le domaine de la santĂ© en France. In: Revue d'Ă©conomie financiĂšre, n°67, 2002. L'avenir des institutions financiĂšres mutualistes. pp. 199-210
Dépasser les blocages et faire  du champ de la précarité  un opérateur de transformation du systÚme sanitaire : utopie ou porte  de sortie ?
Poser ainsi la question pourrait confiner au paradoxe : le blocage du systĂšme sanitaire â du systĂšme social en gĂ©nĂ©ral â nâest-il pas prĂ©cisĂ©ment liĂ© Ă la persistance des Ă©tats de prĂ©caritĂ©s ? Il pourrait mĂȘme se rapprocher dâune provocation : le champ de la prĂ©caritĂ© ne peut-il ĂȘtre « valorisé » comme opĂ©rateur dâun changement global ? ! Pourtant, depuis de trĂšs nombreuses annĂ©es je postule quâun systĂšme complexe est plus « facilement » accessible, en sa logique mĂȘme de dĂ©veloppement, si lâon agit Ă ses limites de validitĂ©, de normalitĂ© et de normalisation des pratiques et des comportements. Le « champ du prĂ©caire » constitue en effet une « zone sensible » pour des modifications des paradigmes majeurs dâun systĂšme qui dĂ©montre, par lâexistence et lâinstitutionnalisation du « prĂ©cariat », quâil dĂ©borde et quâil est dĂ©bordĂ©
Dépasser les blocages et faire  du champ de la précarité  un opérateur de transformation du systÚme sanitaire : utopie ou porte  de sortie ?
Poser ainsi la question pourrait confiner au paradoxe : le blocage du systĂšme sanitaire â du systĂšme social en gĂ©nĂ©ral â nâest-il pas prĂ©cisĂ©ment liĂ© Ă la persistance des Ă©tats de prĂ©caritĂ©s ? Il pourrait mĂȘme se rapprocher dâune provocation : le champ de la prĂ©caritĂ© ne peut-il ĂȘtre « valorisé » comme opĂ©rateur dâun changement global ? ! Pourtant, depuis de trĂšs nombreuses annĂ©es je postule quâun systĂšme complexe est plus « facilement » accessible, en sa logique mĂȘme de dĂ©veloppement, si lâon agit Ă ses limites de validitĂ©, de normalitĂ© et de normalisation des pratiques et des comportements. Le « champ du prĂ©caire » constitue en effet une « zone sensible » pour des modifications des paradigmes majeurs dâun systĂšme qui dĂ©montre, par lâexistence et lâinstitutionnalisation du « prĂ©cariat », quâil dĂ©borde et quâil est dĂ©bordĂ©
Beta-decay studies using total absorption techniques: some recent results
6 pages, 4 figures.-- PACS nr.: 23.40.-s.[EN] Beta-decay experiments are a primary source of information for nuclear structure studies and at the same time complementary to in-beam investigations far from stability. Although both types of experiment are mainly based on Îł-ray spectroscopy, they face different experimental problems. The so called Pandemonium effect [1] is a critical problem in ÎČ-decay. In this contribution we will present a solution to this problem using total absorption spectroscopy methods. We will also present some examples of experiments carried out with the total absorption spectrometers TAS at GSI and Lucrecia recently installed at CERN.[ES] Lejos del valle de la estabilidad, los procesos de desintegraciĂłn beta constituyen una fuente de informaciĂłn fundamental en estudios de
estructura nuclear y al mismo tiempo son complementarios a los estudios âin-beamâ. A pesar de que ambos tipos de experimentos estan
basados en tĂ©cnicas de la espectroscopĂa gamma, son diferentes los problemas experimentales a los que ambos tipos de experimentos se enfrentan. El llamado Efecto Pandemonio [1] es un problema crĂtico en estudios de la desintegraciĂłn beta. En esta contribuciĂłn presentaremos una soluciĂłn a este problema, por medio del uso de la tĂ©cnica de absorciĂłn total. Tambien presentaremos algunos ejemplos de experimentos realizados con los espectrĂłmetros TAS en el GSI, y Lucrecia, recientemente instalado en el CERN.This work was partially supported by C.I.C.Y.T (Spain) under contracts AEN96-1662 and FPA 2002-04181-C04-03, by C.S.R. (Poland) grant KBN-2Pp03B-039-13, by R.F.B.R (Russia)-D.F.G (Germany) contract 436 RUS 113/201/0(R), by OTKA T713074 and by the EC contracts HPMF-CT-1999-00394 and A. Aâs European Return Grant. A.A. recognizes partial support of the JĂĄnos Bolyai research fellowship.Peer reviewe
Total absorption spectroscopy of 76Sr with the Lucrecia spectrometer at ISOLDE
4 pages, 2 figures.-- Issue title: "Proceedings of the Eighth International Conference on Nucleus-Nucleus Collisions (NN2003, Moscow, Jun 17-21, 2003)".A new Total Absorption Spectrometer (TAS) called "Lucrecia" has been installed at
ISOLDE (CERN) to investigate the ÎČ-decay of some nuclei with Aâ70-80 in the vicinity
of the N=Z line. In this work we report on the decay of the N=Z nucleus 76Sr, measured
with a TAS for the first time. The Gamow-Teller strength distribution B(GT) for this
decay is presented and compared with theoretical calculations.Peer reviewe
Beta decay studies far from stability with the Total Absorption Technique: the case of 76Sr
4 pages, 1 figure.-- Published in: Proceedings of the 22nd International Nuclear Physics Conference (Part 2), Göteborg, Sweden, Jun 27-Jul 2, 2004.Printed version published on Apr 18, 2005.This article explains the importance of ÎČ decay studies far from stability with the Total Absorption technique using as an example the decay of Sr-76. In this case the proper measurement of the BGT strength distribution over the full QÎČ window, confirmed the ideas proposed long ago by Hamamoto of obtaining information about the nuclear deformation from beta decay.Peer reviewe
KRACH SANITAIRE : la crise, Ă quel prix ?
Aujourdâhui, notre systĂšme de protection sociale est malade. Ce ne sont plus seulement les populations auxquelles une association comme MĂ©decins du Monde apporte assistance chaque jour qui sont concernĂ©es. A cĂŽtĂ© des migrants, des sans-logements, des travailleurs du sexe ou encore des usagers de drogues, câest de plus en plus la population gĂ©nĂ©rale qui rencontre des difficultĂ©s dâaccĂšs aux soins. Prendre la mesure de lâĂ©volution de la prĂ©caritĂ© chez certaines populations, dĂ©crire les tensions et difficultĂ©s actuelles auxquelles sont exposĂ©s certains dispositifs, comme lâAide mĂ©dicale dâEtat ou le Droit au sĂ©jour pour maladie, tels sont les objectifs de ce numĂ©ro. Il rĂ©unit les reprĂ©sentants de structures qui assurent aujourdâhui le « filet de sĂ©curitĂ© sociale », des observateurs de cette exclusion sanitaire montante et des acteurs qui innovent au quotidien. Avec eux, dans le contexte de crise Ă©conomique et financiĂšre que nous connaissons, et alors que se dessine une tendance Ă lâindividualisation des risques, il sâagit dâobtenir des Ă©lĂ©ments de rĂ©ponse Ă la question qui surplombe ces problĂ©matiques : quel systĂšme de santĂ© solidaire souhaitons-nous construire
The Ectocarpus genome and the independent evolution of multicellularity in brown algae
Brown algae (Phaeophyceae) are complex photosynthetic organisms with a very different evolutionary history to green plants, to which they are only distantly related1. These seaweeds are the dominant species in rocky coastal ecosystems and they exhibit many interesting adaptations to these, often harsh, environments. Brown algae are also one of only a small number of eukaryotic lineages that have evolved complex multicellularity (Fig. 1). We report the 214?million base pair (Mbp) genome sequence of the filamentous seaweed Ectocarpus siliculosus (Dillwyn) Lyngbye, a model organism for brown algae2, 3, 4, 5, closely related to the kelps6, 7 (Fig. 1). Genome features such as the presence of an extended set of light-harvesting and pigment biosynthesis genes and new metabolic processes such as halide metabolism help explain the ability of this organism to cope with the highly variable tidal environment. The evolution of multicellularity in this lineage is correlated with the presence of a rich array of signal transduction genes. Of particular interest is the presence of a family of receptor kinases, as the independent evolution of related molecules has been linked with the emergence of multicellularity in both the animal and green plant lineages. The Ectocarpus genome sequence represents an important step towards developing this organism as a model species, providing the possibility to combine genomic and genetic2 approaches to explore these and other4, 5 aspects of brown algal biology further.<br/