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Start Over Author "Redon, A." Topic 23.20.lv ? transitions and level energies
9 results on '"Redon, A."'

4. High-spin structures of 51121, 123, 125, 127Sb nuclei: Single proton and core-coupled states

Author

Porquet, M. -G., Venkova, Ts., Lucas, R., Astier, A., Bauchet, A., Deloncle, I., Prévost, A., Azaiez, F., Barreau, G., Bogachev, A., Buforn, N., Buta, A., Curien, D., Doan, T. P., Donadille, L., Dorvaux, O., Duchêne, G., Durell, J., Ethvignot, Th., Gall, B. P. J., Grimwood, D., Houry, M., Khalfallah, F., Korten, W., Lalkovski, S., Le Coz, Y., Meyer, M., Minkova, A., Piqueras, I., Redon, N., Roach, A., Rousseau, M., Schulz, N., Smith, A. G., Stézowski, O., Theisen, Ch., and Varley, B. J.

Published
2005
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6. 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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7. High-spin excitations of 84 35Br49 and 85 35Br50: Mapping the proton sub-shells towards 78Ni.

Author

Astier, A., Porquet, M., Venkova, Ts., Deloncle, I., 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 reactions, NUCLEAR fission, CONTROLLED fusion, SPIN excitations, FORCE & energy
Abstract

The 84, 85Br nuclei have been produced as fission fragments in the fusion reaction 18O + 208Pb at 85MeV bombarding energy and studied with the Euroball IV array. The high-spin states of the odd-odd 84Br nucleus have been identified for the first time, the observed structure being built on the known 6- isomeric state. High-spin states of 85Br have been observed up to 5.4MeV excitation energy and spin I ∼ 21/2. From angular correlation analysis, spin values have been assigned to most of the 85Br excited states up to 4MeV. None of these excited states has been found to exhibit a delayed decay having T 1/2 > 10ns. All the observed states in 84, 85Br can be described by various proton excitations involving at least the two sub-shells ( π f 5/2 and π p 3/2) located just above the Z = 28 shell closure. [ABSTRACT FROM AUTHOR]

Published
2006
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8. New high-spin states of 147Nd and 145Ce: Octupole correlation in the N = 87 isotones.

Author

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

Subjects
NUCLEAR fission, NUCLEAR reactions, NUCLEAR energy, RADIATION, NUCLEAR size (Physics), NUCLEAR spectroscopy, SPIN excitations, NEUTRONS
Abstract

High-spin states of the N = 87 nuclei, 147Nd and 145Ce, have been populated in the 12C + 238U and 18O + 208Pb fusion-fission reactions at 90 MeV and 85 MeV bombarding energy, respectively. The emitted γ-radiation was detected using the Euroball III and IV arrays. High-spin states of the 147Nd isotope have been identified for the first time. The high-spin yrast and near-to-yrast structures of the 145Ce nucleus have been considerably extended. The newly observed structures, discussed by analogy with the neighbouring isotones, show the coupling of an h 9/2 neutron to the quadrupole and octupole excitations of the core. [ABSTRACT FROM AUTHOR]

Published
2005
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9. Medium-spin excitations of the neutron-rich84Se isotope: Possible decrease in energy of the N = 50 neutron-core excitation.

Author

A. Prévost, Porquet, M. G., Astier, A., Deloncle, I., 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
NUCLEAR shell theory, PARTICLES (Nuclear physics), NEUTRONS, SPIN excitations, NUCLEAR excitation, NUCLEAR physics
Abstract

The84Se nucleus has been produced as fission fragment in the fusion reaction18O +208Pb at 85MeV bombarding energy and studied with the Euroball IV array. Medium-spin states of this neutron-rich isotope have been identified for the first time. Its level scheme has been obtained up to 4.9MeV excitation energy and spinI~ 7?. Its structure is interpreted by analogy with those of the stable heavier isotones. The evolution of the energy of theN= 50 neutron-core excitation is discussed as a function of the proton number. [ABSTRACT FROM AUTHOR]

Published
2004
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