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9 results on '"Foucher, J.L."'

1. Lifetime measurements in Ti 52,54 to study shell evolution toward N=32

Author

Goldkuhle, A., Fransen, C., Blazhev, A., Beckers, M., Birkenbach, B., Braunroth, T., Clément, E., Dewald, A., Dudouet, J., Eberth, J., Hess, H., Jacquot, B., Jolie, J., Kim, Y.H., Lemasson, A., Lenzi, Silvia M., Li, H.J., Litzinger, J., Michelagnoli, C., Müller-Gatermann, C., Nara Singh, B.S., Pérez-Vidal, R.M., Ralet, D., Reiter, P., Vogt, A., Warr, N., Zell, K.O., Ataç, A., Barrientos, D., Barthe-Dejean, C., Benzoni, G., Boston, A.J., Boston, H.C., Bourgault, P., Burrows, I., Cacitti, J., Cederwall, B., Ciemala, M., Cullen, D.M., De France, G., Domingo Pardo, César, Foucher, J.L., Fremont, G., Gadea, Andrés, Gangnant, P., González, V., Goupil, J., Henrich, C., Houarner, C., Sanchis, E., Ministerio de Economía y Competitividad (España), and Ministerio de Ciencia, Innovación y Universidades (España)

Subjects
Nuclear Experiment
Abstract

AGATA Collaboration, Lifetimes of the excited states in the neutron-rich Ti52,54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accélérateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the γ-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 21+ to 81+ yrast states in Ti52,54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N=32 subshell closure. The B(E2) values for Ti52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.

Published
2019

2. Lifetime measurements in 52,54Ti to study shell evolution toward N=32

Author

Goldkuhle, A., Fransen, C., Blazhev, A., Beckers, M., Birkenbach, B., Braunroth, T., Clément, E., Dewald, A., Dudouet, J., Eberth, J., Hess, H., Jacquot, B., Jolie, J., Kim, Y.H., Lemasson, A., Lenzi, S.M., Li, H.J., Litzinger, J., Michelagnoli, C., Müller-Gatermann, C., Nara Singh, B.S., Pérez-Vidal, R.M., Ralet, D., Reiter, P., Vogt, A., Warr, N., Zell, K.O., Ataç, A., Barrientos, D., Barthe-Dejean, C., Benzoni, G., Boston, A.J., Boston, H.C., Bourgault, P., Burrows, I., Cacitti, J., Cederwall, B., Ciemala, M., Cullen, D.M., De France, G., Domingo-Pardo, C., Foucher, J.L., Fremont, G., Gadea, A., Gangnant, P., González, V., Goupil, J., Henrich, C., Houarner, C., Jean, M., Judson, D.S., Korichi, A., Korten, W., Labiche, M., Lefevre, A., Legeard, L., Legruel, F., Leoni, S., Ljungvall, J., Maj, A., Maugeais, C., Ménager, L., Ménard, N., Menegazzo, R., Mengoni, D., Million, B., Munoz, H., Napoli, D.R., Navin, A., Nyberg, J., Ozille, M., Podolyak, Zs., Pullia, A., Raine, B., Recchia, F., Ropert, J., Saillant, F., Salsac, M.D., Sanchis, E., Schmitt, C., Simpson, J., Spitaels, C., Stezowski, O., Theisen, Ch., Toulemonde, M., Tripon, M., Valiente Dobón, J.J., Voltolini, G., Zielińska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), AGATA, ILL, Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Nuclear Structure
Abstract

International audience; Lifetimes of the excited states in the neutron-rich Ti52,54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accélérateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the γ-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 21+ to 81+ yrast states in Ti52,54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N=32 subshell closure. The B(E2) values for Ti52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.

Published
2019
Full Text
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3. Influence of hypophysectomy, castration, fasting and spermiation on SBP concentration in male rainbow trout

Author

Foucher, J.L., Le Bail, Pierre-Yves, Le Gac, Florence, Station de physiologie des poissons, and Institut National de la Recherche Agronomique (INRA)

Subjects
salmonidae, oncorhynchus mykiss, sperme, hypophysectomie, [SDV]Life Sciences [q-bio], hormone stéroïdienne, truite, hormone sexuelle, castration, reproduction, mâle, poisson, protéine de liaison, spermiation, plasma, teneur hormonale, circulatory and respiratory physiology
Abstract

International audience; The influence of different experimental and physiological conditions on sex steroid binding protein (SBP) concentrations in the blood (and in hepatic and testicular cytosols) has been studied on male rainbow trout. SBP was measured with a specific binding assay. The aim was to further understanding of regulation of the SBP and in particular to determine the respective influences of reproductive and metabolic status. Twelve days after hypophysectomy, pituitary and steroid hormones were dramatically decreased and SBP concentrations were significantly lowered in blood (-32%) and in hepatic cytosol (-46%) while the binding protein concentration remained constant in testicular cytosol. Castration of maturing animals did not influence SBP concentration in blood and liver cytosol. Toward the end of the reproductive cycle, a dramatic decrease (-80%) of plasma SBP concentration occurred that appears independent of androgen changes that take place during this period, but is concomitant with a rapid increase of plasma growth hormone (GH) levels (and possibly secondary to a natural arrest of food intake). Long-term fasting that increases endogenous GH but decreases plasma IGFs (insulin-like growth factors) concentrations also induces a limited but significant decrease in SBP concentration. Treatment of intact control trout with recombinant bovine GH (1 microgram/g wt, twice a week, for 6 weeks) increased plasma IGF concentrations but did not significantly increase SBP levels. These results suggest that in mature male trout, testicular androgens have little or no influence on SBP regulation. GH levels or liver GH responsiveness and IGF might be involved in SBP regulation. This would, in part, explain the large decrease in SBP around spermiation in trout.

Published
1992

4. Aspects of sex-steroid binding protein (SBP) regulation in rainbow trout (Oncorhynchus mykiss)

Author

Foucher, J.L., Niu, P.D., Mourot, Brigitte, and Le Gac, Florence

Subjects
salmonidae, reproduction, endocrine system, oncorhynchus mykiss, poisson, hormone, stéroïde sexuel, sbp, hormones, hormone substitutes, and hormone antagonists, truite arc en ciel
Abstract

The respective roles of sex steroids and hormones involved in growth and metabolism (GH, T3, Cortisol, IGF1, insulin), on SBP regulation have been studied in vivo and/or in vitro on trout hepatocytes.

Published
1991

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