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98 results on '"Bouneau, S."'

51. The $i_{13/2}$ proton intruder orbital in the superdeformed $^{193}$Tl nucleus: effective magnetic moment and blocking of proton pairing

Author

Bouneau, S., Wilson, A. N., Azaiez, F., Sharpey-Schafer, J. F., Korichi, A., Deloncle, I., Porquet, M. G., Timar, J., Astier, A., Bergstrom, M., Bourgeois, C., Ducroux, L., Duprat, J., Gall, B. J. P., Hannachi, F., Kaci, M., Le Coz, Y., Araceli Lopez-Martens, Meyer, M., Paul, E. S., Perrin, N., Pilotte, S., Redon, N., Riley, M. A., Schuck, C., Sergolle, H., Wyss, R., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Lorgeril, Jocelyne, 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), 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)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1996

52. Superdeformed proton orbitals below the Z=80 gap: $^{191}$Au

Author

Lopez-Martens, A., Gueorguieva, E., Schuck, C., Hannachi, F., Vieu, C., Dionisio, J.S., Kaci, M., Deloncle, I., Porquet, M.G., Korichi, A., Duprat, J., Bouneau, S., Azaiez, F., Kelly, W.H., Gall, B.J.P., Kharraja, B., Van Severen, U.J., Pohler, W., Schulze, B., Hubel, H., Deleplanque, M.A., Wadsworth, R., Lorgeril, Jocelyne, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (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 Physique Nucléaire d'Orsay (IPNO), Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1996

53. Measurement of energy and angular distributions of secondary ions in the sputtering of gold by swift Au-n clusters: Study of emission mechanisms

Author

Bouneau, S., Della Negra, S., Jacquet, D., Le Beyec, Y., Pautrat, M., Shapiro, M. H., Tombrello, T. A., Bouneau, S., Della Negra, S., Jacquet, D., Le Beyec, Y., Pautrat, M., Shapiro, M. H., and Tombrello, T. A.

Abstract

Energy and angular distributions of negative ions (Au–, Au2-, Au3-, and Au5-) emitted from gold target bombarded by Au, Au4, and Au9 projectiles at 200 keV/atom were measured with a multipixel position sensitive detector. The angular distributions are symmetrical with respect to the normal to the target surface and forward peaked. They depend on the type of emitted ions, on the emission energy, and on the projectile size. More forward directed emission is observed with Au9 projectiles. The secondary ion energy distributions obtained with Au and Au4 projectiles are well reproduced by a sum of linear collision cascades and thermal spike processes. However, in the case of Au9 projectiles the energy distributions are better described by using a simple spike model with two different average temperature regimes: the first one corresponds to high emission energy occurring in the early stage of the whole process, and the second to the low energy component.

Published
2005

55. Proton excitations in the sd nuclei of the mass 190 region

Author

Bouneau, S., Wilson, A.N., Azaiez, F., Sharpey-Schafer, J.F., Korichi, A., Deloncle, I., Porquet, M.G., Timar, J., Astier, A., Bergstrom, M., Bourgeois, C., Ducroux, L., Duprat, J., Gall, B.J.P., Hannachi, F., Kaci, M., Le Coz, Y., Lopez-Martens, A., Meyer, M., Paul, E.S., Perrin, N., Pilotte, S., Redon, N., Riley, M.A., Schuck, C., Sergolle, H., Wyss, R., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Institut de Physique Nucléaire de Lyon (IPNL), 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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1995

56. Exotic superdeformed structures in A approximately 190 nuclei observed using EUROGAM2

Author

Sharpey-Schafer, J.F., Wilson, A.N., Timar, J., Crowell, B., Bouneau, S., Azaiez, F., Astier, A., Bergstrom, M., Carpenter, M.P., Du-Croiz, L., Duprat, J., Gall, B.J.P., Hannachi, F., Janssens, R.V.F., Khoo, T.L., Korichi, A., Le Coz, Y., Lopez-Martens, A., Meyer, M., Paul, E.S., Porquet, M.G., Redon, N., Riley, M.A., Schuck, C., Simpson, J., Nakatsukasa, T., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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 de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and EUROGAM

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
1995

57. Exotic superdeformed structure in A $\appprox$ 190 nuclei observed using Eurogam2

Author

Sharpey-Schafer, J F, Wilson, A N, Timár, J, Crowell, B, Bouneau, S, Azaiez, F, Astier, A, Bergström, M R, Carpenter, M P, Du Croix, L, Duprat, J, Gall, B J P, Hannachi, F, Janssens, R V F, Khoo, T L, Korichi, A, Le Coz, Y L, López-Martens, A, Meyer, M R, Paul, E S, Porquet, M G, Redon, N, Riley, M A, Schück, C, Simpson, J, and Nakatsukasa, T

Subjects
Nuclear Physics
Published
1995

61. Simulation of MeV/atom cluster correlations in matter

Author

Hartman, J. W., Tombrello, T. A., Bouneau, S., Della Negra, S., Jacquet, D., Le Beyec, Y., Pautrat, M., Hartman, J. W., Tombrello, T. A., Bouneau, S., Della Negra, S., Jacquet, D., Le Beyec, Y., and Pautrat, M.

Abstract

We present an efficient algorithm able to predict the trajectories of individual cluster constituents as they penetrate relatively thick amorphous targets. Our algorithm properly treats both the intracluster Coulomb repulsion and the collisions between cluster constituents and target atoms. We have compared our simulation predictions to experimental measurements of the distribution of lateral exit velocities, and demonstrated that the in-target Coulomb explosion of 2MeV/atom carbon clusters in carbon foils must be shielded with a screening length of less than 2.5 Å. We also present a simple phenomenological model for the suppression of the exit-side charge of ions in clusters which depends on the enhanced ionization potential that an electron near an ion feels due to the ion’s charged comoving neighbors. By using our simulation algorithm we have predicted the exit correlations of the cluster constituents and verified that the charge suppression model fits the observed charge suppression of ions in clusters to within the experimental uncertainties.

Published
2000

63. Intrinsic proton states around the superdeformed shell closure Z=80

Author

Bouneau, S., Azaiez, Faiçal, Duprat, Josette, Deloncle, Isabelle, Porquet, M. G., Astier, Alain, Bergström, M., Bourgeois, Christian, Ducroux, L., Gall, B. J. P., Kaci, M., Le Coz, Y., Meyer, Matthias, Paul, E. S., Redon, N., Riley, M. A., Sergolle, H., Sharpey-Schafer, J. F., Timar, Janos, Wilson, A. N., Wyss, R., Heenen, Paul-Henri, Bouneau, S., Azaiez, Faiçal, Duprat, Josette, Deloncle, Isabelle, Porquet, M. G., Astier, Alain, Bergström, M., Bourgeois, Christian, Ducroux, L., Gall, B. J. P., Kaci, M., Le Coz, Y., Meyer, Matthias, Paul, E. S., Redon, N., Riley, M. A., Sergolle, H., Sharpey-Schafer, J. F., Timar, Janos, Wilson, A. N., Wyss, R., and Heenen, Paul-Henri

Abstract

info:eu-repo/semantics/published

Published
1998

66. Detailed study of magnetic rotation in 196Pb

Author

Singh, A.K., primary, Nenoff, N., additional, Roßbach, D., additional, Görgen, A., additional, Chmel, S., additional, Azaiez, F., additional, Astier, A., additional, Bazzacco, D., additional, Belleguic, M., additional, Bouneau, S., additional, Bourgeois, C., additional, Buforn, N., additional, Cederwall, B., additional, Deloncle, I., additional, Domscheit, J., additional, Hannachi, F., additional, Hauschild, K., additional, Hübel, H., additional, Korichi, A., additional, Korten, W., additional, Kröll, T., additional, LeCoz, Y., additional, Lopez-Martens, A., additional, Lucas, R., additional, Lunardi, S., additional, Maier, H.J., additional, Mergel, E., additional, Meyer, M., additional, Petrache, C.M., additional, Redon, N., additional, Reiter, P., additional, Rossi-Alvarez, C., additional, Schönwaßer, G., additional, Stezowski, O., additional, Thirolf, P.G., additional, and Wilson, A.N., additional

Published
2002
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68. Superdeformation in bismuth

Author

Clark, R M, Bouneau, S, Wilson, A N, Cederwall, Bo, Azaiez, F, Asztalos, S, Becker, J A, Bernstein, L, Brinkman, M J, Deleplanque, M A, Deloncle, I, Diamond, R M, Duprat, J, Fallon, P, Farris, L P, Henry, E A, Hughes, J R, Kelly, W H, Lee, I Y, Macchiavelli, A O, Porquet, M G, SharpeySchafer, J F, Stephens, F S, Stoyer, M A, Vo, D T, Clark, R M, Bouneau, S, Wilson, A N, Cederwall, Bo, Azaiez, F, Asztalos, S, Becker, J A, Bernstein, L, Brinkman, M J, Deleplanque, M A, Deloncle, I, Diamond, R M, Duprat, J, Fallon, P, Farris, L P, Henry, E A, Hughes, J R, Kelly, W H, Lee, I Y, Macchiavelli, A O, Porquet, M G, SharpeySchafer, J F, Stephens, F S, Stoyer, M A, and Vo, D T

Abstract

High angular momentum states in Bi-195-197 are populated in two reactions: W-183(F-19,xn)Bi-202-x and Ta-181(Ne-20,xn)Bi-201-x at beam energies of 108 and 123 MeV, respectively. Gamma rays were detected using the Gammasphere array. Three weakly populated rotational sequences have been found. They each have properties characteristic of other superdeformed bands in this mass region. On the basis of cross-bombardment information we believe that one band belongs to each of Bi-195, Bi-196, and Bi-197. The properties of the bands in the odd-Bi nuclei are best reproduced if the odd proton occupies the favored signature of the [651]1/2 orbital, while the band in Bi-196 has this same proton configuration coupled to an additional N=7 (j(15/2)) neutron. The relative behavior of the J((2)) moments of inertia can be qualitatively understood in terms of Pauli-blocking effects., NR 2015

Published
1996
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69. Magnetic Rotation In 196Pb.

Author

Hübel, H., Singh, A. K., Nenoff, N., Roßbach, D., Görgen, A., Chmel, S., Azaiez, F., Astier, A., Bazzacco, D., Belleguic, M., Bouneau, S., Bourgeois, C., Buforn, N., Cederwall, B., Deloncle, I., Domscheit, J., Hannachi, F., Hauschild, K., and Korichi, A.

Subjects
LEAD, MOLECULAR rotation, NUCLEAR excitation
Abstract

A detailed spectroscopic study of high-spin states in [sup 196]Pb has been carried out using the EUROBALL spectrometer array. Five new magnetic-rotational bands have been found and the previously known bands have been extended. With one exception, all the bands have been connected to lower-lying states and excitation energies, spins and parities have been determined. Doppler-broadend lineshapes have been analyzed and lifetimes of states in four of the bands have been determined. The B(M1) values show the decrease with increasing spin that is expected for shears bands. Configurations of proton-particle excitations coupled to neutron-hole states have been assigned to the bands. [ABSTRACT FROM AUTHOR]

Published
2003

71. SUPERDEFORMATION IN THE BISMUTH NUCLEI

Author

CLARK, RM, BOUNEAU, S, AZAIEZ, F, ASZTALOS, S, BECKER, JA, Cederwall, Bo, DELEPLANQUE, MA, DIAMOND, RM, DUPRAT, J, FALLON, P, FARRIS, LP, HENRY, EA, HUGHES, JR, KELLY, WH, LEE, IY, MACCHIAVELLI, AO, PORQUET, MG, SHARPEYSCHAFER, JF, STEPHENS, FS, STOYER, MA, VO, DT, WILSON, AN, CLARK, RM, BOUNEAU, S, AZAIEZ, F, ASZTALOS, S, BECKER, JA, Cederwall, Bo, DELEPLANQUE, MA, DIAMOND, RM, DUPRAT, J, FALLON, P, FARRIS, LP, HENRY, EA, HUGHES, JR, KELLY, WH, LEE, IY, MACCHIAVELLI, AO, PORQUET, MG, SHARPEYSCHAFER, JF, STEPHENS, FS, STOYER, MA, VO, DT, and WILSON, AN

Abstract

NR 2015

Published
1995
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72. HIGH SPIN STRUCTURE OF THE 113-116CD ISOTOPES PRODUCED BY HEAVY-ION INDUCED FISSION REACTION.

Author

BUFORN, N., ASTIER, A., MEYER, J., MEYER, M., PERRIÈS, S., REDON, N., PORQUET, M. G., DELONCLE, I., BAUCHET, A., GALL, B., HOELLINGER, F., SCHULZ, N., AZAIEZ, F., BOUNEAU, S., BOURGEOIS, C., DUPRAT, J., SERGOLLE, H., GAUTHERIN, C., LUCAS, R., and GUEORGUIEVA, E.

Subjects
CADMIUM isotopes, HIGH spin physics, NUCLEAR spin, NUCLEAR fission, QUASIPARTICLES, HARTREE-Fock approximation
Published
2000

75. High-Spin Structure of the 113?116Cd Isotopes Produced by Heavy-ion Induced Fission Reaction

Author

Buforn, N., primary, Astier, A., additional, Meyer, J., additional, Perri?s, S., additional, Redon, N., additional, Porquet, M. G., additional, Deloncle, I., additional, Bauchet, A., additional, Azaiez, F., additional, Bouneau, S., additional, Bourgeois, C., additional, Duprat, J., additional, Gall, B. J. P., additional, Cautherin, C., additional, Gueorguieva, E., additional, Hoellinger, F., additional, Kutsarova, T., additional, Lucas, R., additional, Minkova, A., additional, Schulz, N., additional, Sergolle, H., additional, Venkova, T., additional, and Wilson, A. N., additional

Published
2000
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76. Neutronh11/2band structures of109,111Pdobserved in heavy-ion induced fission

Author

Kutsarova, T., primary, Minkova, A., additional, Porquet, M.-G., additional, Deloncle, I., additional, Gueorguieva, E., additional, Azaiez, F., additional, Bouneau, S., additional, Bourgeois, C., additional, Duprat, J., additional, Gall, B. J. P., additional, Gautherin, C., additional, Hoellinger, F., additional, Lucas, R., additional, Schulz, N., additional, Sergolle, H., additional, Venkova, Ts., additional, and Wilson, A., additional

Published
1998
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77. Odd-even effects in fission induced by heavy ions

Author

Porquet, M. G., primary, Deloncle, I., additional, Gall, B. J. P., additional, Hoellinger, F., additional, Schulz, N., additional, Sergolle, H., additional, Kutsarova, T., additional, Minkova, A., additional, Gautherin, C., additional, Lucas, R., additional, Wilson, A., additional, Duprat, J., additional, Gueorguieva, E., additional, Venkova, T., additional, Astier, A., additional, Redon, N., additional, Meyer, M., additional, Perriès, S., additional, Azaiez, F., additional, Bouneau, S., additional, and Bourgeois, C., additional

Published
1998
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78. Superdeformation in bismuth

Author

Clark, R. M., primary, Bouneau, S., additional, Wilson, A. N., additional, Cederwall, B., additional, Azaiez, F., additional, Asztalos, S., additional, Becker, J. A., additional, Bernstein, L., additional, Brinkman, M. J., additional, Deleplanque, M. A., additional, Deloncle, I., additional, Diamond, R. M., additional, Duprat, J., additional, Fallon, P., additional, Farris, L. P., additional, Henry, E. A., additional, Hughes, J. R., additional, Kelly, W. H., additional, Lee, I. Y., additional, Macchiavelli, A. O., additional, Porquet, M. G., additional, Sharpey-Schafer, J. F., additional, Stephens, F. S., additional, Stoyer, M. A., additional, and Vo, D. T., additional

Published
1996
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79. Thei132proton intruder orbital in the superdeformedTl193nucleus: Effective magnetic moment and blocking of proton pairing

Author

Bouneau, S., primary, Wilson, A. N., additional, Azaiez, F., additional, Sharpey-Schafer, J. F., additional, Korichi, A., additional, Deloncle, I., additional, Porquet, M. G., additional, Timar, J., additional, Astier, A., additional, Bergstrom, M., additional, Bourgeois, C., additional, Ducroux, L., additional, Duprat, J., additional, Gall, B. J. P., additional, Hannachi, F., additional, Kaci, M., additional, Le Coz, Y., additional, Lopez-Martens, A., additional, Meyer, M., additional, Paul, E. S., additional, Perrin, N., additional, Pilotte, S., additional, Redon, N., additional, Riley, M. A., additional, Schuck, C., additional, Sergolle, H., additional, and Wyss, R., additional

Published
1996
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80. Superdeformation in the bismuth nuclei

Author

Clark, R. M., primary, Bouneau, S., additional, Azaiez, F., additional, Asztalos, S., additional, Becker, J. A., additional, Cederwall, B., additional, Deleplanque, M. A., additional, Diamond, R. M., additional, Duprat, J., additional, Fallon, P., additional, Farris, L. P., additional, Henry, E. A., additional, Hughes, J. R., additional, Kelly, W. H., additional, Lee, I. Y., additional, Macchiavelli, A. O., additional, Porquet, M. G., additional, Sharpey-Schafer, J. F., additional, Stephens, F. S., additional, Stoyer, M. A., additional, Vo, D. T., additional, and Wilson, A. N., additional

Published
1995
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81. Anion production in high-velocity cluster-atom collisions; the electron capture process revisited.

Author

Béroff, K., Chabot, M., Martinet, G., Pino, T., Bouneau, S., Le Padellec, A., Féraud, G., Do Thi, N., Calvo, F., Bordas, C., and Lépine, F.

Subjects
ANIONS, FULLERENES, ATOMIC collisions, ELECTRON capture, NUCLEAR cross sections, HELIUM
Abstract

Anion production cross sections in collisions between Cn+, Cn carbon clusters (n = 5) and helium atoms have been measured in high-velocity collisions (v = 2.25 and 2.6 au). This paper focuses on two of the three processes responsible for the Cn- production, namely double electron capture (DEC) onto Cn+ cations and single electron capture onto neutral (SECN) Cn.They were experimentally distinguished from a gaseous thickness dependence study. Dissociative and non-dissociative cross sections were measured and, in the case of DEC, all dissociative branching ratios measured; for these small systems, the C2- fragment was found magical. Data concerning electron capture in neutral-neutral collisions are extremely rare, especially at high velocity. Introduction of this measured process in the independent atom and electron (IAE) model allowed us to revisit and satisfactorily reproduce the so-far unexplained size evolution of single electron capture (SEC) cross sections in 2.6 au Cn+-He (n = 10) collisions (Chabot et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 2593-603). IAE calculations for DEC cross sections and their comparison with experiment suggest a loss of electron in anionic Cn- species after the collision, competing with fragmentation and depending on the size. [ABSTRACT FROM AUTHOR]

Published
2013
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82. NEW INSIGHTS INTO SUPERDEFORMED NUCLEI IN THE A ~ 190 REGION.

Author

Sergolle, H., Ahmad, I., Aïche, M., Astier, A., Azaiez, F., Bastin, G., Beausang, C. W., Béraud, R., Bouneau, S., Bourgeois, C., Carpenter, M. P., Clark, R. M., Deloncle, I., Ducroux, L., Duffait, R., Duprat, J., Gall, B., Hannachi, F., Henry, R. G., and Hubel, H.

Subjects
NEUTRONS, NUCLEAR liquid drop model, DEFORMATIONS (Mechanics), EXOTIC nuclei, SPECTROMETERS
Published
1995

83. Octupole vibrations of the superdeformed196Pb nucleus.

Author

Azaiez, F., Bouneau, S., Duprat, J., Deloncle, I., Porquet, M-G., Severen, U., Nakatsukasa, T., Aleonard, M., Astier, A., Baldsiefen, S., Beausang, C., Beck, F., Bourgeois, C., Curien, D., Dozie, N., Ducroux, L., Gall, B., Hubel, H., Kaci, M., and Korten, W.

Abstract

The study of the superdeformed (SD)196Pb nucleus has been revisited using the Eurogam Phase 2 spectrometer. All of the three observed excited SD bands were found to decay to the yrast SD band through, presumably, E1 transitions, allowing relative spin and excitation energy assignments. Comparisons with calculations using the random-phase approximation suggest that all three excited bands can be interpreted as octupole vibrational structures. [ABSTRACT FROM AUTHOR]

Published
1997
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84. Decay from superdeformed yrast states to normal deformed states in 193Tl.

Author

Bouneau, S., Azaiez, F., Duprat, J., Deloncle, I., Porquet, M.G., Astier, A., Bergström, M., Bourgeois, C., Ducroux, L., Gall, B.J.P., Kaci, M., Le Coz, Y., Meyer, M., Paul, E.S., Redon, N., Riley, M.A., Sergolle, H., Sharpey-Schafer, J.F., Timar, J., and Wilson, A.N.

Abstract

Three high energy γ rays have been observed to connect the two yrast signature-partners superdeformed bands in 193Tl to the normal deformed states. Thereby, both excitation energy and spin of these bands are proposed for the first time in an odd-proton nucleus. [ABSTRACT FROM AUTHOR]

Published
1998
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85. Conversion--electron gamma--ray coincidence spectroscopy of superdeformed 135Nd.

Author

Aengenvoort, B., Korten, W., Hübel, H., Chmel, S., Görgen, A., van Severen, U.J., Pohler, W., Zinken, R., Härtlein, T., Ender, C., Köck, F., Reiter, P., Schwalm, D., Schindler, F., Gerl, J., Schubart, R., Azaiez, F., Bouneau, S., Duprat, J., and Deloncle, I.

Abstract

Three mini-orange conversion–electron spectrometers and four Euroball Ge Cluster detectors have been used for γ–e- coincidence spectroscopy of superdeformed 135Nd. Transitions within the superdeformed band are shown to have the expected E2 multipolarity. The 766.5–keV transition which links the band to a positive-parity state has a conversion coefficient consistent with M1 multipolarity. Consequently, positive parity is deduced for the superdeformed band. No evidence for E0 transitions was found. [ABSTRACT FROM AUTHOR]

Published
1998
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87. Decay from superdeformed yrast states to normal deformed states in <SUP>193</SUP>Tl

Author

Bouneau, S., Azaiez, F., Duprat, J., Deloncle, I., Porquet, M.G., Astier, A., Bergström, M., Bourgeois, C., Ducroux, L., Gall, B.J.P., Kaci, M., Le Coz, Y., Meyer, M., Paul, E.S., Redon, N., Riley, M.A., Sergolle, H., Sharpey-Schafer, J.F., Timar, J., Wilson, A.N., and Wyss, R.

Abstract

Three high energy rays have been observed to connect the two yrast signature-partners superdeformed bands in 193Tl to the normal deformed states. Thereby, both excitation energy and spin of these bands are proposed for the first time in an odd-proton nucleus.

Published
1998
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88. High spin investigation in $^{193}$Pb with EUROGAM 2: coexistence of superdeformed and dipole bands

Author

Astier, A., Ducroux, L., Duffait, R., Le Coz, Y., Meyer, M., Perriès, S., Redon, N., Sharpey-Schafer, J.F., Wilson, A.N., Gall, B.J.P., Collatz, R., Deloncle, I., Hannachi, F., Lopez-Martens, A., Porquet, M.G., Schuck, C., Azaiez, F., Bouneau, S., Bourgeois, C., Korichi, A., Poffe, N., Sergolle, H., Lucas, R., Meot, V., Hibbert, I., Wadsworth, R., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), Lorgeril, Jocelyne, 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), and 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)

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

89. Possible candidates for discrete gamma rays linking superdeformed and yrast states in an odd nucleus: $^{193}$Pb

Author

Perriès, S., Astier, A., Ducroux, L., Duffait, R., Le Coz, Y., Meyer, M., Redon, N., Azaiez, F., Bouneau, S., Bourgeois, C., Collatz, R., Deloncle, I., Gall, B. J. P., Hannachi, F., Hibbert, I., Korichi, A., Araceli Lopez-Martens, Lucas, R., Meot, V., Poffe, N., Porquet, M. G., Schuck, C., Sergolle, H., Sharpey-Schafer, J. F., Wadsworth, R., Wilson, A. N., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), 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), and Lorgeril, Jocelyne

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

90. Americium early transmutation in thermal reactors: An option to a better nuclear spent fuel management

Author

Zakari-Issoufou, A. -A, Doligez, X., Somaini, A., Ernoult, M., David, S., Bouneau, S., Courtin, F., Leniau, B., Thiolliére, N., Mouginot, B., Adrien Bidaud, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)

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

ISBN 978-4-89047-167-6; International audience

91. Configurations of superdeformed bands in $^{193}$Pb

Author

Ducroux, L., Astier, A., Duffait, R., Le Coz, Y., Meyer, M., Perriès, S., Redon, N., Sharpey-Schafer, J. F., Wilson, A. N., Gall, B. J. P., Collatz, R., Deloncle, I., Hannachi, F., Araceli Lopez-Martens, Porquet, M. G., Schuck, C., Azaiez, F., Bouneau, S., Bourgeois, C., Korichi, A., Poffe, N., Sergolle, H., Lucas, R., Meot, V., Hibbert, I., Wadsworth, R., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-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), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), 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), and 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)

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

92. New results on the superdeformed Pb nucleus: decay of the excited bands to the yrast band.

Author

Bouneau, S., Azaiez, F., Duprat, J., Deloncle, I., Porquet, M.-G., Severen, U.J., Nakatsukasa, T., Aléonard, M.-M., Astier, A., Baldsiefen, G., Beausang, C.W., Beck, F.A., Bourgeois, C., Curien, D., Dozié, N., Ducroux, L., Gall, B.J.P., Hübel, H., Kaci, M., and Korten, W.

Abstract

The study of the superdeformed Pb nucleus has been revisited using the EUROGAMphase 2 array. In addition to the known yrast and two excited SD bands, a third excited SD band has been found. All of the three excited bands were found to decay to the yrast SD band through presumably E1 transitions. Comparisons with calculations using RPAapproximation indicate that the excited bands can be interpreted as octupole-vibrational structures. [ABSTRACT FROM AUTHOR]

Published
1997
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93. High spin investigation in Pb with EUROGAM 2: coexistence of superdeformed and dipole bands.

Author

Astier, A., Ducroux, L., Duffait, R., Coz, Y., Meyer, M., Perries, S., Redon, N., Sharpey-Schafer, J.F., Wilson, A.N., Gall, B.J.P., Collatz, R., Deloncle, I., Hannachi, F., Lopez-Martens, A., Porquet, M.G., Schück, C., Azaiez, F., Bouneau, S., Bourgeois, C., and Korichi, A.

Abstract

The nucleus Pb was populated via the Er(Si, 5n) reaction at a beam energy of 159 MeV and studied with the EUROGAM II spectrometer. Five new dipole ΔI = 1 cascades have been found. The Pb dipole bands are discussed in terms of microscopic HF+BCS calculations. The proposed configurations are based on a high-K two-quasiproton excitation coupled to rotation aligned quasineutrons. Parallel to the dipole bands the six superdeformed bands have been discussed in the framework of microscopic mean-field calculations. The bands are interpreted as three pairs of signature partners based on quasineutron excitations. Cross-talk transitions linking two signature partner superdeformed bands have been observed and, for the first time in lead isotopes, a mean B(M1)/B(E2) ratio value of 0.15±0.04 μ/e has been extracted. [ABSTRACT FROM AUTHOR]

Published
1997
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94. Conversion-electron spectroscopy in the decay of superdeformed Nd.

Author

Korten, W., Schulze, B., Hübel, H., Chmel, S., Görgen, A., Severen, U.J., Pohler, W., Zinken, R., Härtlein, T., Ender, C., Köck, F., Reiter, P., Schwalm, D., Schindler, F., Gerl, J., Schubart, R., Azaiez, F., Bouneau, S., Duprat, J., and Deloncle, I.

Abstract

We have investigated the structure of the superdeformed band in Nd using conversion-electron spectroscopy. The transitions within the superdeformed band show conversion coefficients which are consistent with an E2 multipolarity. From the conversion coefficients of transitions linking this band with known low-lying states its positive parity was established. Hence, a direct determination of the parity of a high-spin superdeformed band could be performed for the first time. [ABSTRACT FROM AUTHOR]

Published
1997
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95. Confirmation of the existence of a superdeformed rotational band in192Pb

Author

Ducroux, L., Astier, A., Béraud, R., Duffait, R., Le Coz, Y., Meyer, M., Perries, S., Redon, N., Sharpey-Schafer, J. F., Wilson, A. N., Collatz, R., Deloncle, I., Hannachi, F., Kaci, M., Lopez-Martens, A., Porquet, M. G., Schück, C., Azaiez, F., Bouneau, S., Bourgeois, C., Duprat, J., Korichi, A., Perrin, N., Poffé, N., Sergolle, H., Goutte, D., Lucas, R., Meot, V., Hibbert, I., Wadsworth, R., Beck, F., Curien, D., De France, G., Duchêne, G., Gall, B., Haas, B., and Vivien, J. P.

Abstract

A controversy has arisen over the existence, or not, of a superdeformed rotational band in192Pb. We have carried out an experiment using the168Er(3OSi, 6n)192Pb reaction at 159 MeV and have observed the coincident? rays in the EUROGAM 2 spectrometer. We confirm the original result of Henry et al. that a superdeformed band exists in192Pb.

Published
1995
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96. Detailed study of magnetic rotation in 196Pb.

Author

Singh, A. K., Nenoff, N., Roßbach, D., Görgen, A., Chmel, S., Azaiez, F., Astier, A., Bazzacco, D., Belleguic, M., Bouneau, S., Bourgeois, C., Buforn, N., Cederwall, B., Deloncle, I., Domscheit, J., Hannachi, F., Hauschild, K., Hübel, H., Korichi, A., and Korten, W.

Subjects
*HIGH spin physics, *NUCLEAR reactions
Abstract

High-spin states in 196Pb have been populated in two different heavy-ion-induced reactions using thin and Au-backed targets, respectively. Gamma-ray coincidences were measured using the EUROBALL spectrometer array. Five new magnetic-rotational bands have been found. The previously known four bands have been extended and some of their levels have been reordered. With one exception, all the bands have been connected to lower-lying states and excitation energies, spins and parities have been determined. From the systematic properties of the bands and from comparison to tilted-axis cranking calculations, arguments for configuration assignments to the bands are derived. It is suggested that the bands are based on proton 11− and 8+ particle states coupled to various neutron–hole excitations. [Copyright &y& Elsevier]

Published
2002
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97. Configurations of superdeformed bands in 193Pb.

Author

Ducroux L, Astier A, Duffait R, Le Coz Y, Meyer M, Perries S, Redon N, Sharpey-Schafer JF, Wilson AN, Gall BJ, Collatz R, Deloncle I I, Hannachi F, Lopez-Martens A, Porquet MG, Schück C, Azaiez F, Bouneau S, Bourgeois C, Korichi A, Poffé N, Sergolle H, Lucas R, Meot V V, Hibbert I I, and Wadsworth R

Published
1996
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