Search

Your search keyword '"Assie, Marlène"' showing total 6 results
Start Over Author "Assie, Marlène"
6 results on '"Assie, Marlène"'

1. Probing neutron correlations through nuclear break-up

Author

Assie, Marlene and Lacroix, Denis

Subjects
Nuclear Theory, Condensed Matter - Strongly Correlated Electrons, Nuclear Experiment
Abstract

The effect of initial correlations between nucleons on the nuclear break-up mechanism is studied. A quantum transport theory which extends standard mean-field approach is developed to incorporate short range pairing correlation as well as direct nucleon-nucleon collisions. A time evolution of the nuclear break-up from a correlated system leading to the emission of two particles to the continuum is performed. We show that initial correlations have strong influence on relative angles between particles emitted in coincidence. The present qualitative study indicates that nuclear break-up might be a tool to infer the residual interaction between nucleons in the nuclear medium., Comment: final published version in Phys. Rev. Lett. 102 (2009), 4 pages, 3 figures

Published
2009
Full Text
View/download PDF

2. An above-barrier narrow resonance in F-15

Author

de Grancey, F., Mercenne, Alexis, Santos, F. de Oliveira, Davinson, Thomas, Sorlin, Olivier, Angelique, Jean-Claude, Assie, Marlène, Berthoumieux, Eric, Borcea, Ruxandra, Buta, Anna, Čeliković, Igor T., Chudoba, V., Daugas, Jean Michel, Dumitru, G., Fadil, Manssour, Grèvy, Stéphane, Kiener, Jürgen K., Lefebvre-Schuhl, A., Michel, Nicolas, Mrazek, Jaromir, Negoita, Florin, Okolowicz, Jacek, Pantelica, Dan, Pellegriti, Maria Grazia, Perrot, L., Ploszajczak, M., Randisi, G., Ray, I., Roig, O., Rotaru, F., Saint Laurent, M. G., Smirnova, N., Stanoiu, M., Stefan, I., Stodel, C., Subotić, Krunoslav M., Tatischeff, V., Thomas, J. C., Ujić, Predrag, Wolski, R., de Grancey, F., Mercenne, Alexis, Santos, F. de Oliveira, Davinson, Thomas, Sorlin, Olivier, Angelique, Jean-Claude, Assie, Marlène, Berthoumieux, Eric, Borcea, Ruxandra, Buta, Anna, Čeliković, Igor T., Chudoba, V., Daugas, Jean Michel, Dumitru, G., Fadil, Manssour, Grèvy, Stéphane, Kiener, Jürgen K., Lefebvre-Schuhl, A., Michel, Nicolas, Mrazek, Jaromir, Negoita, Florin, Okolowicz, Jacek, Pantelica, Dan, Pellegriti, Maria Grazia, Perrot, L., Ploszajczak, M., Randisi, G., Ray, I., Roig, O., Rotaru, F., Saint Laurent, M. G., Smirnova, N., Stanoiu, M., Stefan, I., Stodel, C., Subotić, Krunoslav M., Tatischeff, V., Thomas, J. C., Ujić, Predrag, and Wolski, R.

Abstract

Intense and purified radioactive beam of post-accelerated O-14 was used to study the low-lying states in the unbound F-15 nucleus. Exploiting resonant elastic scattering in inverse kinematics with a thick target, the second excited state, a resonance at E-R = 4.757(6)(10) MeV with a width of Gamma = 36(5)(14) keV was measured for the first time with high precision. The structure of this narrow above-barrier state in a nucleus located two neutrons beyond the proton drip line was investigated using the Gamow Shell Model in the coupled channel representation with a C-12 core and three valence protons. It is found that it is an almost pure wave function of two quasi-bound protons in the 2s(1/2) shell. (C) 2016 The Authors. Published by Elsevier B.V.

Published
2016

3. First direct lifetime measurement of the 2(1)(+) state in Zn-72,Zn-74: New evidence for a shape transition between N=40 and N=42 close to Z=28

Author

Niikura, M., Mouginot, B., Franchoo, S., Matea, I., Stefan, I., Verney, D., Azaiez, F., Assie, Marlène, Bednarczyk, P., Borcea, Catalin, Burger, A., Burgunder, G., Buta, Anna, Caceres, L., Clement, Emmanuel, Coquard, L., de Angelis, G., de France, Gilles, Santos, F. de Oliveira, Dewald, Alfred, Dijon, A., Dombradi, Z., Fiori, E., Fransen, C., Friessner, G., Gaudefroy, L., Georgiev, G., Grèvy, Stéphane, Hackstein, Matthias, Harakeh, M. N., Ibrahim, F., Kamalou, O., Kmiecik, M., Lozeva, R., Maj, A., Mihai, C., Moeller, O., Myalski, S., Negoita, Florin, Pantelica, Dan, Perrot, L., Pissulla, Th., Rotaru, Florin, Rother, Wolfram, Scarpaci, J. A., Stodel, C., Thomas, Jean-Charles, Ujić, Predrag, and Research unit Nuclear & Hadron Physics

Subjects
NUCLEAR-DEFORMATION, EVEN ZN, COEXISTENCE, SCATTERING, BEAM, SPECTROMETER, MULTIPLE COULOMB-EXCITATION, GROUND-STATES, GE ISOTOPES, QUADRUPOLE-MOMENTS
Abstract

We report here the first direct lifetime measurement of the 2(1)(+) state in Zn-72,Zn-74. The neutron-rich beam was produced by in-flight fragmentation of Ge-76 at the Grand Accelerateur National dIons Lourds and separated with the LISE spectrometer. The 2(1)(+) state was excited by inelastic scattering and knock-out reaction on a CD2 target and its lifetime was measured by the recoil-distance Doppler-shift method with the Koln plunger device combined with the EXOGAM detectors. The lifetimes of the 2(1)(+) states in Zn-72,Zn-74 were determined to be 17.9(18) and 27.0(24) ps, which correspond to reduced transition probabilities B(E2; 2(1)(+)- GT 0(+)) = 385(39) and 370(33) e(2) fm(4), respectively. These values support the idea of a systematic maximum of collectivity at N = 42 for Zn, Ge, and Se nuclei. In addition, the available systematics in the neighboring nuclei point toward a transition from a spherical oscillator at N = 40 to complete gamma-softness at N = 42.

Published
2012

4. Spectroscopy of Na-18: Bridging the two-proton radioactivity of Mg-19

Author

Assie, Marlène, Santos, F. de Oliveira, Davinson, Thomas, de Grancey, F., Achouri, Lynda N., Alcantara-Nunez, J., Al Kalanee, T., Angelique, J-C, Borcea, Catalin, Borcea, Ruxandra, Caceres, L., Čeliković, Igor T., Chudoba, V., Pang, D. Y., Ducoin, C., Fallot, M., Kamalou, O., Kiener, Jürgen K., Lam, Y., Lefebvre-Schuhl, A., Lotay, G., Mrazek, Jaromir, Perrot, L., Sanchez-Benitez, Angel Miguel, Rotaru, Florin, Saint-Laurent, M-G, Sobolev, Yu, Smirnova, N., Stanoiu, Mihai, Stefan, I., Subotić, Krunoslav M., Ujić, Predrag, Wolski, R., and Woods, P. J.

Subjects
Ne-17, Physics::Accelerator Physics, (19)mg, Two-proton radioactivity, Nuclear Experiment, Resonant elastic scattering, Na-18
Abstract

The unbound nucleus Na-18, the intermediate nucleus in the two-proton radioactivity of Mg-19, was studied by the measurement of the resonant elastic scattering reaction H(Ne-17,p)Ne-17 performed at 4 A.MeV using a radioactive beam from the SPIRAL Facility. Spectroscopic properties of the low-lying states were obtained in an R-matrix analysis of the excitation function. (C) 2012 Elsevier B.V. All rights reserved. Preprint available at: [https://arxiv.org/pdf/1110.1236.pdf]

Published
2012

5. Search for Superscreening Effects in a Superconductor

Author

Ujić, Predrag, Santos, F. de Oliveira, Lewitowicz, Marek, Achouri, Lynda N., Assie, Marlène, Bastin, B., Borcea, C., Borcea, Ruxandra, Buta, Anna, Coc, A., de France, Gilles, Kamalou, O., Kiener, Jürgen K., Lepailleur, A., Meot, V., Pautrat, A., Saint Laurent, M. G., Sorlin, Olivier, Stanoiu, M., Tatischeff, V., Ujić, Predrag, Santos, F. de Oliveira, Lewitowicz, Marek, Achouri, Lynda N., Assie, Marlène, Bastin, B., Borcea, C., Borcea, Ruxandra, Buta, Anna, Coc, A., de France, Gilles, Kamalou, O., Kiener, Jürgen K., Lepailleur, A., Meot, V., Pautrat, A., Saint Laurent, M. G., Sorlin, Olivier, Stanoiu, M., and Tatischeff, V.

Abstract

The decay of O-19(beta(-)) and Ne-19(beta(+)) implanted in niobium in its superconducting and metallic phases was measured using purified radioactive beams produced by the SPIRAL GANIL facility. Half-lives and branching ratios measured in the two phases are consistent within a 1 sigma error bar. This measurement casts strong doubts on the predicted strong electron screening in a superconductor, the so-called superscreening. The measured difference in screening potential energy is 110(90) eV for Ne-19 and 400(320) eV for O-19. Precise determinations of the half-lives were obtained for O-19, 26.476(9) s, and for Ne-19, 17.254(5) s.

Published
2013

6. Spectroscopy of the Unbound Nucleus Na-18

Author

Assie, Marlène, Santos, F. De Oliveira, de Grancey, F., Achouri, Lynda N., Alcantara-Nunez, J., Angelique, J. -C., Borcea, C., Caceres, L., Čeliković, Igor T., Chudoba, V., Pang, D. Y., Davinson, Thomas, Ducoin, C., Fallot, M., Kiener, Jürgen K., Lefebvre-Scuhl, A., Lotay, G. L., Mrazek, Jaromir, Perrot, L., Sanchez-Benitez, A. M., Rotaru, F., Saint-Laurent, M. -G., Sobolev, Yu., Stanoiu, M., Stanoiu, R., Stefan, I., Subotić, Krunoslav M., Woods, P. J., Ujić, Predrag, Wolski, R., Assie, Marlène, Santos, F. De Oliveira, de Grancey, F., Achouri, Lynda N., Alcantara-Nunez, J., Angelique, J. -C., Borcea, C., Caceres, L., Čeliković, Igor T., Chudoba, V., Pang, D. Y., Davinson, Thomas, Ducoin, C., Fallot, M., Kiener, Jürgen K., Lefebvre-Scuhl, A., Lotay, G. L., Mrazek, Jaromir, Perrot, L., Sanchez-Benitez, A. M., Rotaru, F., Saint-Laurent, M. -G., Sobolev, Yu., Stanoiu, M., Stanoiu, R., Stefan, I., Subotić, Krunoslav M., Woods, P. J., Ujić, Predrag, and Wolski, R.

Abstract

The unbound nucleus Na-18, the intermediate nucleus in the two-proton radioactivity of Mg-19 is studied through the resonant elastic scattering Ne-17(p,Ne-17)p. The spectroscopic information obtained in this experiment is discussed and put in perspective with previous measurements and the structure of the mirror nucleus N-18.

Published
2011

Catalog

Books, media, physical & digital resources
See catalog results