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204 results on '"RIDIKAS, D."'

51. Pre-equilibrium emission in the inclusive (d, xp) and (d, xd') reactions at 100 MeV

Author

Foertsch, S.V., Ridikas, D., Mittig, W., Savajols, H., Roussel-Chomaz, P., Steyn, G.F., Lawrie, J., 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), 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), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2000

52. Indication of changes in neutron shell closures in light very neutron-rich nuclei

Author

Dlouhy, Z., Angélique, J.C., Anne, R., Auger, G., Azaiez, F., Baiborodin, D., Borcea, C., Caurier, E., Grévy, S., Gillibert, A., Guillemaud-Mueller, D., Lalleman, A.S., Lewitowicz, M., Lopez-Jimenez, M.J., Lukyanov, S.M., Mittig, W., Mrazek, J., Mueller, A.C., Nowacki, F., Oganessian, Yu.Tz., de Oliveira Santos, Francois, Orr, N.A., Page, R.D., Penionzhkevich, Yu.E., Pougheon, F., Reed, A.T., Ren, Zhongzhou, Ridikas, D., Roussel-Chomaz, P., Saint-Laurent, M.G., Sarazin, F., Savajols, H., Sorlin, O., Tarasov, O., Thiamova, G., de Vismes, A., Winfield, J., 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), 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), Institut de Physique Nucléaire d'Orsay (IPNO), 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 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), and Robert, Suzanne

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2000

53. Inclusive proton production cross section in (d, xp) reactions induced by 100 MeV deuterons

Author

Ridikas, D., Mittig, W., Savajols, H., Roussel-Chomaz, P., Foertsch, S.V., Lawrie, J.J., Steyn, G.F., 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), 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
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2000

55. Shape coexistence and the N=28 shell closure far from stability

Author

Sarazin, F., Savajols, H., Mittig, W., Nowacki, F., Orr, N.A., Ren, Zhongzhou, Roussel-Chomaz, P., Auger, G., Baiborodin, D., Belozyorov, A.V., Borcea, C., Caurier, E., Dlouhy, Z., Gillibert, A., Lalleman, A.S., Lewitowicz, M., Lukyanov, S.M., De Oliveira, F., Penionzhkevich, Y.E., Ridikas, D., Tarasov, O., Sakurai, H., De Vismes, A., 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), 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), 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), and Normandie Université (NU)-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]
Abstract

GANIL E290; International audience

Published
2000

59. Shape coexistence and the N = 28 shell closure far from stability

Author

Sarazin, F., Savajols, H., Mittig, W., Nowacki, F., Orr, N.A., Ren, Z., Roussel-Chomaz, P., Auger, G., Baiborodin, D., Belozyorov, A.V., Borcea, C., Caurier, E., Dlouhy, Z., Gilibert, A., Lalleman, A.S., Lewitowicz, M., Lukyanov, S.M., de Oliveira Santos, Francois, Penionzhkevich, Y.E., Ridikas, D., Sakurai, H., Tarasov, O., de Vismes, A., 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), 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), 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), 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), and Normandie Université (NU)-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]
Abstract

The masses of 31 neutron-rich nuclei in the range A = 29-47 have been measured. The precision of 19 masses has been significantly improved and 12 masses were measured for the first time. The neutron-rich Cl, S, and P isotopes are seen to exhibit a change in shell structure around N = 28. Comparison with shell model and relativistic mean field calculations demonstrate that the observed effects arise from deformed prolate ground state configurations associated with shape coexistence. Evidence for shape coexistence is provided by the observation of an isomer in 43S.

Published
2000

60. A mass measurement experiment to investigate the shell closures far from stability

Author

Sarazin, F., Savajols, H., Mittig, W., Roussel-Chomaz, P., Auger, G., Baiborodin, D., Belzyorov, A.V., Borcea, C., Dlouhy, Z., Gilibert, A., Lalleman, A.S., Lewitowicz, M., Lukyanov, S.M., Nowacki, F., de Oliveira Santos, Francois, Orr, N.A., Penionzhkevich, Y.E., Ren, Z., Ridikas, D., Sakurai, H., Tarasov, O., De Vismes, A., 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), 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), Lion, Michel, 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), and Normandie Université (NU)-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
1999

61. Optimisation de combinaisons de faisceau et de cible pour les systèmes de réacteurs hybrides et pour la production de faisceaux radioactifs par fission

Author

Ridikas, D., Lion, Michel, Grand Accélérateur National d'Ions Lourds (GANIL), 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), Université de Caen, and W. Mittig

Subjects
nuclear fission, fission nucléaire, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Réactions directes (physique nucléaire), sources de neutrons, neutron sources, Direct reactions (nuclear physics), faisceaux d'ions radioactifs, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], radioactive ion beams
Abstract

This thesis work consists of two parts: a) theoretical, and b) experimental. We combine and use the high energy transport code LAHET, the low energy transport code MCNP, and the activation code CINDER. Our benchmarking calculations show that LAHET neglects the Coulomb dissociation for deuterons. By adding this missing term, we obtain a good agreement with the available data. We also conclude that LAHET describes well the data for isotope production yields if the ORNL fission model is employed for nuclei with Z>90. The 'default' RAL fission model gives too broad isotopic distributions and fails to reproduce the data in absolute value. We examine different combinations of beams, beam energies, spallation target and multiplying medium materials in order to optimize the neutron production, energy amplification and isotope production via neutron induced fissions. We show that the (d,xn) reactions could bring a number of important advantages when compared to the (p,xn) reactions. We conclude that the use of deuterons instead of protons should result in higher primary beam intensities, lower costs of the system and facilitate radioprotection problems. Within the SPIRAL Phase-II project at GANIL, we propose d(100 MeV)+Be→xn+U as an optimum combination for the production of neutron rich nuclei in the mass region 75≤A≤160. However, the production of tritium gas in the target-converter should be considered carefully. The use of heavier metal targets-converters may cause more severe problems of radioprotection.Our experimental work is closely related to the theoretical investigations. We measure the complete proton spectra for 1.00 and 200 MeV deuteron induced reactions on 8 thin targets (Be, C, Al, Ni, Nb, Ta,, Pb and U) and in the angular region 8 deg C ≤ θp ≤ 120 deg C. The experiments were carried at LNS (Saclay, France) and at NAC (Faure, South Africa). Good quality data (within 10% in absolute value and with 4-8 MeV energy threshold) support our improved LAHET physics modelling for (d,xp) and, consequently, for (d,xn) reactions., Ce travail de thèse se compose d'une partie théorique et d'une partie expérimentale. Nous combinons et utilisons les codes de transport de haute énergie LAHET, de basse énergie MCNP et le code d'activation CINDER. Nos calculs de validation des codes montrent que LAHET néglige la dissociation coulombienne du deutéron. En ajoutant cette contribution, nous obtenons un bon accord avec les données. Nous concluons également que LAHET reproduit bien la production d'isotopes si le modèle de fission ORNL est utilise pour des cibles avec z > 90. Le modèle de fission RAL donne des distributions isotopiques trop larges et ne reproduit pas les données en valeur absolue. Nous examinons différentes combinaisons de faisceaux (projectile, énergie), de cibles de spallation et de cœur de réacteur pour la production de neutrons, l'amplification d'énergie et la production de faisceau radioactif par fission. Nous montrons que les réactions (d, xn) pourraient apporter un certain nombre d'avantages importants, comparées aux réactions (p, xn). Nous concluons que l'utilisation de deutérons au lieu de protons devrait conduire a des intensités de faisceau primaire plus élevées, a un prix réduit du système et a moins de problèmes de radioprotection. Dans le projet SPIRAL Phase-II au GANIL, nous proposons la combinaison d(100 MeV)+Be→xn+U pour une production optimum de noyaux riches en neutron dans la région de masse 75≤A≤160. Cependant, la production de gaz de tritium dans la cible de conversion devrait être soigneusement étudiée. Nous prouvons également que l'utilisation des cibles de conversion de métal plus lourd peut poser des problèmes de radioprotection plus graves. Notre travail expérimental est directement relié aux investigations théoriques. Nous mesurons les distributions en énergie de protons produits par des deutérons de 100 et de 200 MeV sur 8 cibles minces (Be, C, Al, Ni, Nb, Ta, Pb et U) et dans la région angulaire 8° ≤ θp ≤ 120°. Les deux expériences ont été réalisées au LNS (Saclay, france) et au NAC (Faure, Afrique du Sud). Les données de bonne qualité (10% en valeur absolue et un seuil en énergie de 4-8 MeV) sont bien reproduites par le modèle LAHET amélioré pour les réactions (d, xp) et, par conséquent, pour les réaction (d, xn).

Published
1999

65. Persistence of the N=28 shell closure far from stability

Author

Sarazin, F., Savajols, H., Mittig, W., Auger, G., Baiborodin, D., Belezyorov, A.V., Borcea, C., Gilibert, A., Lalleman, A.S., Lewitowicz, M., Lukyanov, S.M., De Oliveira, F., Orr, N.A., Penionzhkevich, Y.E., Ridikas, D., Roussel-Chomaz, P., Sakurai, H., De Vismes, A., Grand Accélérateur National d'Ions Lourds (GANIL), 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), 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

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

International audience

Published
1998

66. Calculation of nucleon production cross sections for 200 MeV deuterons

Author

Ridikas, D., Mittig, W., Grand Accélérateur National d'Ions Lourds (GANIL), 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), and GANIL

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Physics
Published
1997

67. The Neutrons for Science Facility at SPIRAL-2

Author

Ledoux, X., primary, Aïche, M., additional, Avrigeanu, M., additional, Avrigeanu, V., additional, Audouin, L., additional, Balanzat, E., additional, Ban-d'Etat, B., additional, Ban, G., additional, Barreau, G., additional, Bauge, E., additional, Bélier, G., additional, Bem, P., additional, Blideanu, V., additional, Blomgren, J., additional, Borcea, C., additional, Bouffard, S., additional, Caillaud, T., additional, Chatillon, A., additional, Czajkowski, S., additional, Dessagne, P., additional, Doré, D., additional, Fallot, M., additional, Farget, F., additional, Fischer, U., additional, Giot, L., additional, Granier, T., additional, Guillous, S., additional, Gunsing, F., additional, Gustavsson, C., additional, Herber, S., additional, Jacquot, B., additional, Jurado, B., additional, Kerveno, M., additional, Klix, A., additional, Landoas, O., additional, Lecolley, F. R., additional, Lecolley, J. F., additional, Lecouey, J. L., additional, Majerle, M., additional, Marie, N., additional, Materna, T., additional, Mrazek, J., additional, Negoita, F., additional, Novak, J., additional, Oberstedt, S., additional, Oberstedt, A., additional, Panebianco, S., additional, Perrot, L., additional, Petrascu, M., additional, Plompen, A. J. M., additional, Pomp, S., additional, Ramillon, J. M., additional, Ridikas, D., additional, Rossé, B., additional, Rudolf, G., additional, Serot, O., additional, Shcherbakov, O., additional, Simakov, S. P., additional, Simeckova, E., additional, Smith, A. G., additional, Steckmeyer, J. C., additional, Sublet, J. C., additional, Taïeb, J., additional, Tassan-Got, L., additional, Takibayev, A., additional, Tungborn, E., additional, Thfoin, I., additional, Tsekhanovich, I., additional, Varignon, C., additional, Wieleczko, J. P., additional, Hamm, Marianne E., additional, and Hamm, Robert W., additional

Published
2011
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71. Delayed neutron and delayed photon characteristics from photofission of [sup 232]Th, [sup 235,238]U, and [sup 237]Np with endpoint Bremsstrahlung photons in the giant dipole resonance region

Author

Doré, D., primary, Dighe, P. M., additional, Berthoumieux, E., additional, Laborie, J.-M., additional, Ledoux, X., additional, Macary, V., additional, Panebianco, S., additional, Ridikas, D., additional, Chatillon, Audrey, additional, Faust, Herbert, additional, Fioni, Gabriele, additional, Goutte, Dominique, additional, and Goutte, Héloise, additional

Published
2009
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72. The JEFF evaluated nuclear data project

Author

Koning, A. J., primary, Avrigeanu, M., additional, Avrigeanu, V., additional, Batistoni, P., additional, Bauge, E., additional, Bé, M.-M., additional, Bem, P., additional, Bernard, D., additional, Bersillon, O., additional, Bidaud, A., additional, Bouland, O., additional, Courcelle, A., additional, Dean, C. J., additional, Dos-Santos-Uzarralde, P., additional, Duchemin, B., additional, Duhamel, I., additional, Duijvestijn, M. C., additional, Dupont, E., additional, Fischer, U., additional, Forrest, R. A., additional, Gunsing, F., additional, Haeck, W., additional, Henriksson, H., additional, Hogenbirk, A., additional, Huynh, T. D., additional, Jacqmin, R., additional, Jouanne, C., additional, Keinert, J., additional, Kellett, M. A., additional, Kodeli, I., additional, Kopecky, J., additional, Leeb, H., additional, Leichtle, D., additional, Leppanen, J., additional, Litaize, O., additional, Lopez Jimenez, M. J., additional, Mattes, M., additional, Menapace, E., additional, Mills, R. W., additional, Morillon, B., additional, Mounier, C., additional, Nichols, A. L., additional, Noguere, G., additional, Nordborg, C., additional, Nouri, A., additional, Perel, R. L., additional, Pereslavtsev, P., additional, Perry, R. J., additional, Pescarini, M., additional, Pillon, M., additional, Plompen, A. J.M., additional, Ridikas, D., additional, Romain, P., additional, Rugama, Y., additional, Rullhusen, P., additional, de Saint Jean, C., additional, Santamarina, A., additional, Sartori, E., additional, Seidel, K., additional, Serot, O., additional, Simakov, S., additional, Sublet, J.-Ch., additional, Tagesen, S., additional, Trkov, A., additional, van der Marck, S. C., additional, and Vonach, H., additional

Published
2007
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76. A neutron beam facility at SPIRAL-2

Author

Ledoux, X., primary, Aïche, M., additional, Ban, G., additional, Barreau, G., additional, Baumann, P., additional, Bem, P., additional, Blideanu, V., additional, Blomgren, J., additional, Czajkowski, S., additional, Dessagne, P., additional, Dupont, E., additional, Doré, D., additional, Ethvignot, T., additional, Fischer, U., additional, Gunsing, F., additional, Jacquot, B., additional, Jurado, B., additional, Kerveno, M., additional, Lecolley, F. R., additional, Lecouey, J. L., additional, Negoita, F., additional, Oberstedt, S., additional, Petrascu, M., additional, Plompen, A. J.M., additional, Rejmund, F., additional, Ridikas, D., additional, Rudolf, G., additional, Shcherbakov, O., additional, Simakov, S. P., additional, and Taïeb, J., additional

Published
2007
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79. Measurements of delayed neutrons yields and time spectra from 1 GeV protons interacting with thick natPb, 209Bi and natFe targets

Author

Ridikas, D., primary, Barzakh, A., additional, Blideanu, V., additional, David, J.-C., additional, Doré, D., additional, Fedorov, D., additional, Ledoux, X., additional, Moroz, F., additional, Panteleev, V., additional, Plukiene, R., additional, Plukis, A., additional, Prévost, A., additional, Shcherbakov, O., additional, and Vorobyev, A., additional

Published
2007
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86. UCX TARGET DESIGN FOR THE SPIRAL 2 PROJECT AND THE ALTO PROJECT

Author

BAJEAT, O., primary, AZAIEZ, F., additional, BOURGEOIS, C., additional, CHEIKH MAHMED, M., additional, CROIZET, H., additional, DUCOURTIEUX, M., additional, ESSABAA, S., additional, FIFI, R., additional, FRANCHOO, S., additional, IBRAHIM, F., additional, LAU, C., additional, LEBLANC, F., additional, LEFORT, H., additional, MIREA, M., additional, PHAN VIET, C., additional, POTIER, JC., additional, ROUSSIERE, B., additional, SAUVAGE, J., additional, VERNEY, D., additional, POUGHEON, F., additional, GAUBERT, G., additional, HUGUET, Y., additional, LECESNE, N., additional, LECOMTE, P., additional, LEROY, R., additional, PELLEMOINE, F., additional, SAINT-LAURENT, M.G., additional, NIZERY, F., additional, RIDIKAS, D., additional, and RIBAS, R.V., additional

Published
2005
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88. OPTIMIZATION OF ISOL UCx TARGETS FOR FISSION INDUCED BY FAST NEUTRONS OR ELECTRONS

Author

BAJEAT, O., primary, ESSABAA, S., additional, IBRAHIM, F., additional, LAU, C., additional, HUGUET, Y., additional, JARDIN, P., additional, LECESNE, N., additional, LEROY, R., additional, PELLEMOINE, F., additional, SAINT-LAURENT, M. G., additional, VILLARI, A. C. C., additional, NIZERY, F., additional, PLUKIS, A., additional, RIDIKAS, D., additional, GAUTIER, J. M., additional, and MIREA, M., additional

Published
2004
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89. FISSION YIELD MEASUREMENTS WITH THE ISOL METHOD

Author

KÖSTER, U., primary, AUBÖCK, G., additional, BERGMANN, U.C., additional, CATHERALL, R., additional, CEDERKÄLL, J., additional, FRAILE, L.M., additional, FRANCHOO, S., additional, FYNBO, H., additional, GEORG, U., additional, JOINET, A., additional, JONSSON, O.C., additional, LETTRY, J., additional, PERÄJÄRVI, K., additional, WEISSMAN, L., additional, BAJEAT, O., additional, BORCEA, R., additional, BOURGEOIS, C., additional, DONZAUD, C., additional, DUCOURTIEUX, M., additional, ESSABAA, S., additional, GUILLEMAUD-MUELLER, D., additional, HOSNI, F., additional, IBRAHIM, F., additional, LAU, C., additional, LEFORT, H., additional, OBERT, J., additional, PERRU, O., additional, POTIER, J.C., additional, ROUSSIÈRE, B., additional, PFEIFFER, B., additional, FIORETTO, E., additional, LHERSONNEAU, G., additional, PRETE, G., additional, STROE, L., additional, TECCHIO, L., additional, DIGET, C.AA., additional, JEPPESEN, H., additional, RIISAGER, K., additional, GAUSEMEL, H., additional, HAGEBØ, E., additional, and RIDIKAS, D., additional

Published
2004
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90. Delayed Neutron and Delayed Photon Characteristics from Photofission of Actinides.

Author

Doré, D., Berthoumieux, E., Ledoux, X., Leprince, A., Ridikas, D., Agelou, M., Carrel, F., and Gmar, M.

Subjects
NEUTRONS, PHOTOFISSION, ACTINIDE elements, NUCLEAR reactions, DATA analysis, RADIOACTIVE wastes, PHYSICS experiments
Abstract

Delayed neutron (DN) and delayed photon (DP) emissions from photofission reactions play an important role for applications involving nuclear material detection and characterization. To provide new, accurate, basic nuclear data for evaluations and data libraries, an experimental programme of DN and DP measurements has been undertaken for actinides with bremsstrahlung endpoint energy in the giant resonance region (∼15 MeV). In this paper, the experimental setup and the data analysis method will be described. Experimental results for DN and DP characteristics will be presented for 232Th, 235,238U, 237Np, and 239Pu. Finally, an example of an application to study the contents of nuclear waste packages will be briefly discussed. [ABSTRACT FROM AUTHOR]

Published
2011
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91. THERMAL NEUTRON CAPTURE BRANCHING RATIO OF 209BI USING A GAMMA-RAY TECHNIQUE

Author

LETOURNEAU, A., primary, BERTHOUMIEUX, E., additional, DERUELLE, O., additional, FADIL, M., additional, FIONI, G., additional, GUNSING, F., additional, MARIE, F., additional, PERROT, L., additional, RIDIKAS, D., additional, BOERNER, H., additional, FAUST, H., additional, MUTTI, P., additional, SIMPSON, G., additional, and SCHILLEBEECKX, P., additional

Published
2003
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93. Delayed neutron and delayed photon characteristics from photofission of 232Th, 235,238U, and 237Np with endpoint Bremsstrahlung photons in the giant dipole resonance region.

Author

Doré, D., Dighe, P. M., Berthoumieux, E., Laborie, J.-M., Ledoux, X., Macary, V., Panebianco, S., and Ridikas, D.

Subjects
NEUTRONS, PHOTONS, PHOTOFISSION, BREMSSTRAHLUNG, IRRADIATION, NUCLEAR reactions, NUCLEAR physics
Abstract

A renewed interest in photonuclear reactions was stimulated by applications as radioactive ion beam production, irradiation stations by high energy photons, shielding of electron accelerators, etc. Today, a particular attention is paid to the non-destructive characterization of waste barrels and the detection of nuclear materials, both based on photofission process and the associated delayed neutron (DN) and delayed photon (DP) emissions. The need of accurate and complete data for DN and DP yields and time characteristics of actinides was the motivation for an experimental campaign, started in 2004. In this paper, the experimental setup and the data analysis method will be presented and the modeling work will be described. Experimental results for DN and DP characteristics will be compared to calculations in the case of photofission of 232Th, 235,238U, and 237Np. [ABSTRACT FROM AUTHOR]

Published
2009
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95. Evaluations of Photonuclear Cross Sections for Actinides.

Author

Giacri-Mauborgne, M.-L., Chadwick, M. B., David, J.-C., Doré, D., Ridikas, D., Van Lauwe, A., and Wilson, W. B.

Subjects
PHOTONUCLEAR reactions, NUCLEAR reactions, PHOTONS, ACTINIDE elements, NUCLEAR physics
Abstract

This article presents calculations of photonuclear reaction cross sections for actinides by using different reaction codes, namely an improved version of HMS-ALICE and GNASH. The GDR parameters from the RIPL2 data library are used to describe the total photo-absorption cross section. In general, our results show satisfactory agreement with experimental data and IAEA evaluations. We plan to include our GNASH evaluations for 235U, 238U, 237Np, 239Pu, 240Pu and 241Am into a new release of the ENDF-B/VII data files. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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96. Status of the Photonuclear Data Library for CINDER’90.

Author

Giacri-Mauborgne, M.-L., Chadwick, M. B., David, J.-C., Dore, D., Ridikas, D., Van Lauwe, A., and Wilson, W. B.

Subjects
PHOTONUCLEAR reactions, NUCLEAR reactions, COLLISIONS (Nuclear physics), NUCLEAR physics, PHYSICS, ISOTOPES
Abstract

In this article we present the development of a new photonuclear activation library for the CINDER’90 evolution code (LANL). The IAEA evaluations for 164 isotopes are explicitly included and more than 600 isotopes are added using the HMS-ALICE predictions. GNASH evaluations are used in the case of actinides. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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97. Fission Fragment Distributions and Delayed Neutron Yields from Photon-Induced-Fission.

Author

David, J.-C., Doré, D., Giacri-Mauborgne, M.-L., Ridikas, D., and Van Lauwe, A.

Subjects
NUCLEAR fission, NUCLEAR reactions, NUCLEAR energy, ION bombardment, COLLISIONS (Nuclear physics), NUCLEAR physics, PHYSICS
Abstract

Fission fragment distributions and delayed neutron yields for 235U and 238U are provided by a complete modelization of the photofission process below 25 MeV. The absorption cross-section parameterization and the fission fragment distributions are given and compared to experimental data. The delayed neutron yields and the half-lives in terms of six groups are presented and compared to data obtained with a bremsstrahlung spectrum of 15 MeV. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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98. The Minor Actinide Transmutation-Incineration Potential Studies in High Intensity Neutron Fluxes.

Author

Letourneau, A., Al Mahamid, I., Blandin, Ch., Chabod, S., Chartier, F., Faust, H., Foucher, Y., Marie, F., Mutti, P., Ridikas, D., and Veyssiere, Ch.

Subjects
NEUTRON flux, ACTINIDE elements, HEAVY elements, RADIOACTIVE substances, TRANSMUTATION (Chemistry), RADIOACTIVITY
Abstract

In the framework of nuclear waste transmutation studies, the Mini-INCA project has been initiated at CEA/DSM with objectives to determine optimal conditions for transmutation and incineration of Minor Actinides (MA) in high intensity neutron fluxes. Our experimental tools based on alpha- and gamma-spectroscopy of irradiated samples and the development of fission micro-chambers could gather both microscopic information on nuclear reactions (total and partial cross sections for neutron capture and/or fission reactions) and macroscopic information on transmutation and incineration potentials. Cross sections of selected actinides (241Am, 242Am, 242Pu, 237Np, 238Np) have already been measured at ILL, showing some discrepancies when compared to evaluated data libraries but in overall good agreement with recent experimental data. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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99. Measurement of the Neutron Flux in the 1 MW Pb-Bi Liquid Target of the MEGAPIE Project.

Author

Marie, F., Beauvais, Ph., Blandin, Ch., Breaud, S., Chabod, S., Chattier, F., Foucher, Y., Letourneau, A., Lotrus, P., Molinie, F., Ridikas, D., and Toussaint, J. Ch.

Subjects
NEUTRON flux, THERMIONIC emission, LEAD compounds, BISMUTH compounds, DIRECT energy conversion, ELECTRON emission
Abstract

We propose to measure the neutron flux in the liquid Pb-Bi 1 MW MEGAPIE target at PSI. Micro fission-chambers will be placed inside the central rod of the target to measure both thermal and non-thermal components of the neutron flux. In principle, both time- and space-dependent variations of the flux will be on line monitored with a precision better than 5%. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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100. OPTIMIZATION OF ISOL UCX TARGETS FOR FISSION INDUCED BY FAST NEUTRONS OR ELECTRONS.

Author

BAJEAT, O., ESSABAA, S., IBRAHIM, F., LAU, C., HUGUET, Y., JARDIN, P., LECESNE, N., LEROY, R., PELLEMOINE, F., SAINT-LAURENT, M. G., VILLARI, A. C. C., NIZERY, F., PLUKIS, A., RIDIKAS, D., GAUTIER, J. M., and MIREA, M.

Subjects
RADIOACTIVE nuclear beams, URANIUM, BREMSSTRAHLUNG, DEUTERONS, NUCLEAR fission
Published
2004

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