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4 results on '"S. COURTIN"'

1. Structure of the As, Ge, Ga nuclei

Author

D. Bazzacco, D. Mengoni, M. D. Salsac, A. Khouaja, S. M. Lenzi, E. Sahin, A. F. Lisetskiy, Kenia Teodoro Wiedemann, R. P. Singh, D. Curien, J. J. Valiente-Dobón, E. Fioretto, P. Mason, U. Datta Pramanik, A. Gottardo, J. Ollier, I. Stefan, R. Chapman, L. Corradi, F. Recchia, S. Courtin, R. Orlandi, G. Benzoni, B.J.P. Gall, S. Aydin, J. F. Smith, T. Byrski, K. Zuber, R. Moro, S. Erturk, Igor T. Čeliković, Predrag Ujić, Alejandro Algora, A. M. Stefanini, E. Farnea, M. Labiche, Dieter Ackermann, D. Verney, S. Leoni, G. Montagnoli, R. Silvestri, D. Lebhertz, P. T. Wady, F. Haas, G. Pollarolo, M. Yalcinkaya, A. Gadea, B. Mouginot, F. Ibrahim, O. Dorvaux, F. Azaiez, T. Faul, J. Robin, C. Michelagnoli, S. Franchoo, D. A. Torres, S. Szilner, David O'Donnell, C. A. Ur, Fernando Scarlassara, M. Trotta, A. Kusoglu, M. N. Erduran, B. Guiot, V. Modamio, K. Subotic, G. Duchêne, S. Lunardi, D. Montanari, G. de Angelis, F. Didierjean, M. Bostan, D. Tonev, D. R. Napoli, Elif Ince, J. R. B. Oliveira, and G. La Rana

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Band gap, Nuclear Theory, SHELL model, Shell (structure), Structure (category theory), 01 natural sciences, Stability (probability), Coincidence, 0103 physical sciences, Order (group theory), Atomic physics, 010306 general physics
Abstract

The level structures of the N = 50 83As, 82Ge, and 81Ga isotones have been investigated by means of multi-nucleon transfer reactions. A first experiment was performed with the CLARA–PRISMA setup to identify these nuclei. A second experiment was carried out with the GASP array in order to deduce the γ-ray coincidence information. The results obtained on the high-spin states of such nuclei are used to test the stability of the N = 50 shell closure in the region of 78Ni ( Z = 28 ). The comparison of the experimental level schemes with the shell-model calculations yields an N = 50 energy gap value of 4.7(3) MeV at Z = 28 . This value, in a good agreement with the prediction of the finite-range liquid-drop model as well as with the recent large-scale shell model calculations, does not support a weakening of the N = 50 shell gap down to Z = 28 .

Published
2012
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2. New determination of the 12C(α, γ)16O reaction rate from γ-ray angular distribution measurements

Author

Neil Rowley, F. Fleurot, A. Lopez-Martens, J. Kiener, A. Korichi, D. Le Du, J. W. Hammer, C. Beck, F. Haas, S. Courtin, Alain Coc, Suzana Szilner, G. Staudt, J.J. Correia, C. Boukari-Pelissie, E. Galanopoulos, M. Rousseau, J.L. Weil, C. Grama, R. Kunz, D. Malcherek, P. Papka, R. Meunier, T. Paradellis, Vincent Tatischeff, M. Fey, Sotirios Harissopulos, E. Krmpotic, F. Hammache, and M. Assunção

Subjects
Physics, Reaction rate, Nuclear and High Energy Physics, Angular distribution, 010308 nuclear & particles physics, Nucleosynthesis, 0103 physical sciences, Gamma ray, Alpha (ethology), Atomic physics, 010306 general physics, 01 natural sciences
Published
2005
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3. New information on the β-decay of 11Li from Doppler broadened γ lines

Author

Göran Hugo Nyman, Thomas Nilsson, K. Wilhelmsen, P. Dessagne, María José García Borge, S. Courtin, Joakim Cederkäll, Björn Jonson, H. O. U. Fynbo, Olof Tengblad, E. Poirier, G. Le Scornet, and K. Riisager

Subjects
Nuclear and High Energy Physics, Deduced neutron spectrum, Neutron emission, Astrophysics::High Energy Astrophysical Phenomena, electron and muon capture, Nuclear physics, symbols.namesake, [PACS] Electromagnetic transitions, Radioactivity Li-11(β+-),(β+- n) [from Ta(p,X)], Neutron, [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19, Nuclear Experiment, Be-10 deduced excited states T(1/2), Physics, [PACS] β decay, Large Hadron Collider, Decay scheme, Isotope, Measured β-delayed Eγ,lγ, βγ-coin, DSA, double β decay, Beta decay, 6 ≤ A ≤ 19 [[PACS] Properties of specific nuclei listed by mass ranges], symbols, High Energy Physics::Experiment, Atomic physics, Doppler effect
Abstract

16 pages, 2 tables, 4 figures.-- PACS nrs.: 23.40.-s; 23.20.-g; 27.20.+n.-- Printed version published May 17, 2004., The γ-ray spectrum following β-decay of Li-11 has been remeasured at the ISOLDE facility at CERN. Two new transitions were observed through the use of large Ge-detectors. Most γ-decays will follow β-delayed neutron emission. Information on the energy of the neutron is derived from analysis of the γ line-shape and used to construct a partial decay scheme for Li-11. Lifetime values for the 1(-) and 2(-) levels in Be-10 are also derived. A new partial decay scheme is presented., This work has been partially supported by the Swedish Research Council VR.

Published
2004
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4. Spectroscopy at the N=20 shell closure: the β-decay of32Mg

Author

G. Walter, D. Guillemaud Mueller, S. Gre´vy, Jean Péter, L. Achouri, W. N. Catford, F. Negoita, C. Borcea, A. Knipper, S. Courtin, P. Baumann, C. N. Timis, Oleg B. Tarasov, J.L. Lecouey, E. Poirier, P. Dessagne, J. M. Daugas, J.C. Ange´lique, M. Stanoiu, N. A. Orr, E. Lie´nard, R. Hadeler, A. Buta, J. Mrazek, S. Pietri, François-René Lecolley, M. Lewitowicz, F. de Oliveira, Ch. Miehé, Y. E. Penionzhkevich, Z. Dlouhy, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Island of inversion, Nuclear Theory, Shell (structure), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron spectroscopy, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Spectroscopy, Nucleon, Isotopes of magnesium, ComputingMilieux_MISCELLANEOUS, Radioactive decay
Abstract

The shell closure N=20 has been studied by β-decay spectroscopy experiment performed at the GANIL facility. The experimental setup is described and first results on the beta-decay of 32 Mg are presented. The extracted level scheme of 32 Al is compared to Shell Model calculations and discussed in the light of the structural changes observed for the nuclei of the so-called island of inversion. Finally, neutron time-of-flight spectrum from the β-delayed neutron decay of 32 Mg is presented.

Published
2004
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