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Your search keyword '"Redon, N."' showing total 6 results
Start Over Author "Redon, N." Topic nuclear fission Topic nuclear physics
6 results on '"Redon, N."'

1. In-Beam γ-Ray Spectroscopy of the N=50 Isotones on the Neutron-Rich Side.

Author

Prévost, A., Astier, A., Deloncle, I., Porquet, M.-G., Azaiez, F., Buta, A., Curien, D., Dorvaux, O., Duchêne, G., Gall, B. J. P., Khalfallah, F., Piqueras, I., Rousseau, M., Ibrahim, F., Essabaa, S., Meyer, M., Redon, N., Stézowski, O., Venkova, Ts., and Lucas, R.

Subjects
HIGH spin physics, NUCLEAR fission, CONTROLLED fusion, NEUTRONS, NUCLEAR physics, DELAYED neutrons
Abstract

High-spin states of 84Se, produced as a fission fragment in the fusion-fission reaction 18O+208Pb and studied with the EUROBALL IV array, have been identified for the first time. Their interpretation gives new insights about the evolution of the N=50 shell gap at the vicinity of 78Ni. To characterize this evolution, it would be worth using a new device devoted to the high-spin studies of neutron-rich nuclei produced by asymetric fission modes. Such dedicated studies are reported in a second part. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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2. New high-spin states of 142 58Ce and 140 56Ba from fusion-fission reactions: Proton excitations in the N = 84 isotones.

Author

Venkova, Ts., Porquet, M.-G., Deloncle, I., Petkov, P., Astier, A., Prévost, A., Azaiez, F., Bogachev, A., Buta, A., Curien, D., Dorvaux, O., Duchêne, G., Durell, J., Gall, B. J. P., Houry, M., Khalfallah, F., Lucas, R., Meyer, M., Piqueras, I., and Redon, N.

Subjects
HADRONS, NUCLEAR fission, NUCLEAR reactions, PARTICLES (Nuclear physics), NUCLEAR physics
Abstract

High-spin states in the 142Ce and 140Ba nuclei have been populated in the 12C + 238U and 18O + 208Pb fusion-fission reactions at 90MeV and 85MeV bombarding energy, respectively. The emitted γ -radiation was detected using the Euroball III and IV arrays. The high-spin yrast and near-to-yrast structures of 142Ce have been considerably extended. The level scheme of 140Ba has been extended by six new levels. The newly observed structures in these N = 84 isotones are discussed by analogy with the neighbouring nuclei. [ABSTRACT FROM AUTHOR]

Published
2007
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3. Fission fragment properties obtained in the γ - γ - γ coincidence method in the reaction 208Pb(18O, f ).

Author

Bogachev, A., Krupa, L., Dorvaux, O., Kozulin, E., Itkis, M., Porquet, M.-G., Astier, A., Curien, D., Deloncle, I., Duchene, G., Gall, B. J. P., Hanappe, F., Khalfallah, F., Rousseau, M., Stuttge, L., Redon, N., and Stezowski, O.

Subjects
NUCLEAR fission, NEUTRON beams, NEUTRON multiplicity, NUCLEAR physics, NUCLEAR reactions
Abstract

Independent fission fragment yields have been obtained for the six fragment pairs ( Z L/ Z H = 44/46 , 42/48, 40/50, 38/52, 36/54 and 34/56) in 208Pb(18O, f ) at the beam energy E = 85 MeV. γ -ray spectroscopy technique was applied to analyze the experimental data. With use of these data the mass distribution of fission fragments was restored. Data on average fragment spin distribution and total neutron multiplicity are presented. The agreement of the obtained results with other experimental data proves the validity of the applied method to solve this kind of problems. [ABSTRACT FROM AUTHOR]

Published
2007
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4. Beyond the N = 50 shell closure: High-spin excitations of 87Kr and ground-state spin of 87Br.

Author

Porquet, M., Venkova, Ts., Astier, A., Deloncle, I., Prévost, A., Azaiez, F., Buta, A., Curien, D., Dorvaux, O., Duchêne, G., Gall, B., Khalfallah, F., Piqueras, I., Rousseau, M., Meyer, M., Redon, N., Stézowski, O., Lucas, R., and Bogachev, A.

Subjects
NUCLEAR shell theory, NUCLEAR fission, KRYPTON isotopes, NUCLEAR physics, FISSION gases
Abstract

The 87Kr nucleus has been produced as fission fragment in the fusion reaction 18O + 208Pb at 85MeV bombarding energy and studied with the Euroball IV array. High-spin states of this neutron-rich isotope have been identified for the first time. Its level scheme has been obtained up to 6.3MeV excitation energy and spin I ∼ 23/2ℏ. Its structure is interpreted by analogy with those of the heavier isotones. The proposed configurations involve both proton and neutron excitations from several sub-shells located close to the Fermi levels, particularly ν d 5/2, π p 3/2 f 5/2 and π g 9/2. Moreover, a revised spin value of 5/2- for the 87Br ground state is proposed. [ABSTRACT FROM AUTHOR]

Published
2006
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5. Evolution of the ... configuration in the neutron-rich ... and ... isotopes.

Author

Porquet, M.-G., Venkova, Ts., Astier, A., Bauchet, A., Deloncle, I., Buforn, N., Donadille, L., Dorvaux, O., Gall, B. J. P., Lalkovski, S., R. Lucas, Meyer, M., Minkova, A., Prévost, A., Redon, N., Schulz, N., and Stézowski, O.

Subjects
PARTICLES (Nuclear physics), NUCLEAR physics, NUCLEAR fission, NUCLEAR reactions, RHODIUM isotopes, SILVER isotopes
Abstract

The 110,112 Rh and 114',16Ag nuclei have been produced as fission fragments in the fusion reaction 18 + 208Pb at 85 MeV. Their level schemes have been built from gamma-rays detected using the Euroball IV array. High-spin states of these neutron-rich nuclei have been identified for the first time. The yrast structures consist of rotational bands in which the odd proton occupies the πg9/2 sub-shell and the odd neutron the vh11/2 sub-shell. The evolution of the πg9/2 ® vh11/2 band structure is analyzed as a function of the neutron number. [ABSTRACT FROM AUTHOR]

Published
2003
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6. Experimental Sign of a Weakening of the N=50 Spherical Shell Gap.

Author

Prévost, A., Astier, A., Deloncle, I., Porquet, M.-G., Azaiez, F., Buta, A., Curien, D., Dorvaux, O., Duchêne, G., Gall, B. J. P., Khalfallah, F., Piqueras, I., Rousseau, M., Meyer, M., Redon, N., Stézowski, O., Venkova, Ts., Lucas, R., and Bogachev, A.

Subjects
PARTICLES (Nuclear physics), NUCLEAR physics, NUCLEAR fusion, NUCLEAR fission, NUCLEAR reactions
Abstract

High-spin states of 84Se, produced as a fission fragment in the fusion-fission reaction 18O+208Pb, have been identified for the first time thanks to the EUROBALL IV array. The excitation energies of three of these states, interpreted as being due to the (νg9/2-1 νd5/2+1) neutron-core excitation, give new insights about the evolution of the N=50 shell gap at the vicinity of 78Ni. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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