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21 results on '"C. Golabek"'

1. MIMAC : A micro-tpc matrix for directional detection of dark matter

Author

J. Billard, F. Mayet, J.L. Bouly, A. Delbart, O. Guillaudin, Ch. Fourel, F.J. Iguaz, J. P. Richer, O. Bourrion, Daniel Santos, Efrain J. Ferrer, L. Lebreton, G. Bosson, J.P. Mols, I. Giomataris, C. Golabek, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and MIMAC

Subjects
Physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Dark matter, 3D reconstruction, Astrophysics::Instrumentation and Methods for Astrophysics, General Engineering, Astronomy and Astrophysics, Recoil energy, 01 natural sciences, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear physics, Matrix (mathematics), Low energy, WIMP, Space and Planetary Science, 0103 physical sciences, Neutron, Nuclear Experiment, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS
Abstract

Directional detection of non-baryonic Dark Matter is a promising search strategy for discriminating WIMP events from background ones. This strategy requires both a measurement of the recoil energy down to a few keV and 3D reconstruction of tracks down to a few mm. The MIMAC project, based on a micro-TPC matrix, filled with CF4 and CHF3 is being developed. The first results of a chamber prototype of this matrix, on low energy nuclear recoils (1 H and 19 F) obtained with mono-energetic neutron fields are presented. The discovery potential of this search strategy is illustrated by a realistic case accessible to MIMAC.

Published
2012

2. Transfer-induced fission in inverse kinematics: Impact on experimental and evaluated nuclear data bases

Author

Enrique Casarejos, J. Benlliure, B. Jurado, Andreas Martin Heinz, L. Gaudefroy, C. Rodriguez-Tajes, F. Farget, X. Derkx, A. Lemasson, Karl-Heinz Schmidt, T. Roger, M. Caamaño, C. Golabek, B. Fernández-Domínguez, C. Schmitt, C. Paradela, O. Delaune, L. Audouin, A. Dijon, D. Cortina, D. Doré, Eric Clément, M. D. Salsac, D. Ramos, 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), Universidade de Santiago de Compostela [Spain] (USC ), 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 sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), GANILEXP, 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 Université Sciences et Technologies - Bordeaux 1-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, Cluster decay, Proton, Fission, Nuclear Theory, Nuclear data, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Nuclear physics, Nuclear fission, Neutron number, Nuclear fusion, Atomic number, Atomic physics, Nuclear Experiment
Abstract

Topical collection : Perspectives on Nuclear Dta for the Next Decade; Expérience GANIL/VAMOS; International audience; Inverse kinematics is a new tool to study nuclear fission. Its main advantage is the possibility tomeasure with an unmatched resolution the atomic number of fission fragments, leading to new observablesin the properties of fission-fragment distributions. In addition to the resolution improvement, the studyof fission based on nuclear collisions in inverse kinematics beneficiates from a larger view with respect tothe neutron-induced fission, as in a single experiment the number of fissioning systems and the excitationenergy range are widden. With the use of spectrometers, mass and kinetic-energy distributions may now beinvestigated as a function of the proton and neutron number sharing. The production of fissioning nucleiin transfer reactions allows studying the isotopic yields of fission fragments as a function of the excitationenergy. The higher excitation energy resulting in the fusion reaction leading to the compound nucleus250Cf at an excitation energy of 45MeV is also presented. With the use of inverse kinematics, the chargepolarisation of fragments at scission is now revealed with high precision, and it is shown that it cannotbe neglected, even at higher excitation energies. In addition, the kinematical properties of the fragmentsinform on the deformation configuration at scission

Published
2015

3. Characterization of the scission point from fission-fragment velocities

Author

A. K. Shrivastava, C. Rodriguez-Tajes, J. Benlliure, O. Delaune, C. Golabek, C.O. Bacri, Enrique Casarejos, C. Schmitt, A. Lemasson, X. Derkx, D. Ramos, M. Caamaño, T. Roger, Karl-Heinz Schmidt, F. Farget, L. Audouin, L. Gaudefroy, Beatriz Jurado, B. Fernández-Domínguez, Universidade de Santiago de Compostela [Spain] (USC ), 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 Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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), Universidade de Vigo, University of Liverpool, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), GANILEXP, 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), 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 Université Sciences et Technologies - Bordeaux 1-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, Cluster decay, Nuclear Theory, Proton, 010308 nuclear & particles physics, Fission, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, Nuclear physics, Nuclear Theory (nucl-th), Yield (chemistry), 0103 physical sciences, Atomic number, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Excitation, Energy (signal processing)
Abstract

The isotopic-yield distributions and kinematic properties of fragments produced in transfer-induced fission of 240Pu and fusion-induced fission of 250Cf, with 9 MeV and 45 MeV of excitation energy respectively, were measured in inverse kinematics with the spectrometer VAMOS. The kinematic properties of identified fission fragments allow to derive properties of the scission configuration such as the distance between fragments, the total kinetic energy, the neutron multiplicity, the total excitation energy, and, for the first time, the proton- and neutron-number sharing during the emergence of the fragments. These properties of the scission point are studied as functions of the fragment atomic number. The correlation between these observables, gathered in one single experiment and for two different fissioning systems at different excitation energies, give valuable information for the understanding and modeling of the fission process., Comment: 12 pages, 8 figures

Published
2015

4. Erratum: Isotopic yield distributions of transfer- and fusion-induced fission fromU238+C12reactions in inverse kinematics [Phys. Rev. C88, 024605 (2013)]

Author

K.-H. Schmidt, M. Caamaño, E. Casarejos, M. Rejmund, L. Gaudefroy, G. Barreau, J. Benlliure, L. Audouin, A. K. Shrivastava, A. Chbihi, X. Derkx, C. Golabek, B. Fernández-Domínguez, B. Jurado, A. Navin, T. Roger, C.O. Bacri, O. Delaune, C. Schmitt, F. Farget, and A. Lemasson

Subjects
Physics, Nuclear and High Energy Physics, Fusion, Transfer (group theory), Inverse kinematics, Fission, Computer data analysis, Yield (chemistry), Atomic physics
Published
2014

5. Isotopic yield distributions of transfer- and fusion-induced fission from238U+12C reactions in inverse kinematics

Author

O. Delaune, A. Shrivastava, L. Gaudefroy, Beatriz Jurado, C.O. Bacri, X. Derkx, A. Chbihi, M. Caamaño, C. Schmitt, B. Fernández-Domínguez, F. Farget, A. Lemasson, Enrique Casarejos, G. Barreau, J. Benlliure, C. Golabek, T. Roger, A. Navin, M. Rejmund, Karl-Heinz Schmidt, and L. Audouin

Subjects
Physics, Nuclear and High Energy Physics, Cluster decay, Isotope, 010308 nuclear & particles physics, Fission, Nuclear Theory, Actinide, 01 natural sciences, Nuclear physics, Excited state, Yield (chemistry), 0103 physical sciences, Nuclear fusion, Atomic number, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

A method to access the complete identification in atomic number $Z$ and mass $A$ of fragments produced in low-energy fission of actinides is presented. This method, based on the use of multinucleon transfer and fusion reactions in inverse kinematics, is applied in this work to reactions between a ${}^{238}$U beam and a ${}^{12}$C target to produce and induce fission of moderately excited actinides. The fission fragments are detected and fully identified with the VAMOS spectrometer of GANIL, allowing the measurement of fragment yields of several hundreds of isotopes in a range between $A\ensuremath{\sim}80$ and $\ensuremath{\sim}160$, and from $Z\ensuremath{\sim}30$ to $\ensuremath{\sim}64$. Complete isotopic yield distributions of fragments from well defined fissioning systems are made available. Together with the precise measurement of the fragment emission angles and velocities, this technique gives further insight into the nuclear-fission process.

Published
2013

6. Complete isotopic distributions of fragments produced in transfer- and fusion-induced reactions

Author

Enrique Casarejos, O. Kamalou, J. C. Thomas, O. Delaune, M. G. Saint-Laurent, L. Perrot, C. Schmitt, B. Jurado, C.O. Bacri, A. Navin, Wolfgang Mittig, A. M. Amthor, C. Golabek, F. Farget, A. Lemasson, M. Rejmund, H. Savajols, G. Barreau, Oleg B. Tarasov, C. Stodel, L. Caceres, X. Derkx, J. Pereira, M. Caamano, L. Gaudefroy, J. Benlliure, David J. Morrissey, Karl-Heinz Schmidt, B. Bastin, Antonio Villari, Dominique Bazin, L. Audouin, S. Grévy, B. M. Sherrill, S. M. Lukyanov, B. Blank, T. Roger, B. Fernández-Domínguez, 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), PANTECHNIK S.A., Pantechnik, F. Farget, A. Chatillon, H. Faust, G. Fioni, D. Goutte, H. Goutte, 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), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidade de Santiago de Compostela [Spain] (USC ), 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), Aval du cycle et Energie Nucléaire (ACEN), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-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), Noyaux exotiques (NEX), USC, Universidad de Santiago de Compostela, Universidad Santiago de Compostela, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Fusion, Spectrometer, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Neutron, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract

Expérience GANIL/VAMOS/LISE; International audience; Two fission experiments have been performed at GANIL using 238U beams at different energies and light targets. Different fissioning systems were produced with centre of mass energies from 10 to 240MeV and their decay by fission was investigated with GANIL spectrometers. Fission-fragment isotopic distributions have been obtained. The evolution with impinging energy of their properties, the neutron excess and the width of the neutron-number distributions, gives important insights into the dynamics of the fusionfission mechanism.

Published
2013

7. Isotopic fission fragment distributions as a deep probe to fusion-fission dynamics

Author

B. Jurado, M. Rejmund, Antonio Villari, B. M. Sherill, K.-H. Schmidt, Oleg B. Tarasov, B. Blank, A. M. Amthor, J. Pereira, B. Fernández-Domínguez, F. Farget, H. Savajols, A. Lemasson, S. Grévy, G. Barreau, S. M. Lukyanov, D. Bazin, A. Navin, J. Benlliure, L. Audouin, M. G. Saint-Laurent, C. Schmitt, T. Roger, L. Caceres, X. Derkx, Wolfgang Mittig, B. Bastin, O. Delaune, M. Caamaño, C.O. Bacri, E. Casarejos, L. Gaudefroy, C. Stodel, L. Perrot, C. Golabek, J. C. Thomas, O. Kamalou, A. Chibihi, J. Taieb, David J. Morrissey, 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), Aval du cycle et Energie Nucléaire (ACEN), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-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), 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 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), Noyaux exotiques (NEX), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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 Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-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 Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
History, Fission, Nuclear Theory, Shell (structure), Coulomb barrier, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Molecular physics, Education, 0103 physical sciences, medicine, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Fusion, Range (particle radiation), 010308 nuclear & particles physics, Potential energy, Computer Science Applications, medicine.anatomical_structure, Nucleus, Excitation
Abstract

During the fission process, the nucleus deforms and elongates up to the two fragments inception and their final separation at scission deformation. The evolution of the nucleus energy with deformation is determined by the macroscopic properties of the nucleus, and is also strongly influenced by the single-particle structure of the nucleus. The fission fragment distribution is a direct consequence of the deformation path the nucleus has encountered, and therefore is the most genuine experimental observation of the potential energy landscape of the deforming nucleus. Very asymmetric fusion-fission reactions at energy close to the Coulomb barrier, produce well-defined conditions of the compound nucleus formation, where processes such as quasi-fission, pre-equilibrium emission and incomplete fusion are negligible. In the same time, the excitation energy is sufficient to reduce significantly structural effects, and mostly the macroscopic part of the potential is responsible for the formation of the fission fragments. We use inverse kinematics combined with spectrometers to select and identify the fission fragments produced in $^{238}$U+$^{12}$C at a bombarding energy close to and well-above the Coulomb barrier. For the first time, the isotopic yields are measured over the complete atomic-number distribution, between Z=30 and Z=63. The experimental set-up also allows to identify transfer-induced reactions, which lead to low-energy fission where the nuclear shell structure shows a strong influence on the fission-fragment distributions. The resulting set of data gives the possibility to observe the fission fragment properties over a wide range of excitation energy, and they reveal the vanishing of the shell effects in the potential energy of the fissioning nucleus, as well as the influence of fission dynamics., Comment: Invited Plenary Talk given at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)

Published
2012

8. Evolution of isotopic fission-fragment yields with excitation energy

Author

M. Rejmund, L. Audouin, B. M. Sherrill, J. C. Thomas, Enrique Casarejos, G. Barreau, Oleg B. Tarasov, M. Caamano, A. M. Amthor, J. Taieb, C.O. Bacri, C. Golabek, H. Savajols, Wolfgang Mittig, C. Schmitt, B. Bastin, David J. Morrissey, X. Derkx, B. Jurado, A. Navin, Antonio Villari, C. Stodel, L. Caceres, L. Perrot, J. Benlliure, F. Farget, A. Lemasson, O. Delaune, O. Kamalou, D. Bazin, T. Roger, B. Fernández-Domínguez, S. Grévy, K.-H. Schmidt, B. Blank, L. Gaudefroy, S. M. Lukyanov, M. G. Saint-Laurent, J. Pereira, J.D Frankland, A. Pagano, S. Pirrone, M.-F Rivet, F. Rizzo, 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), PANTECHNIK S.A., Pantechnik, 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 Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Physics, Isotopes of uranium, Isotope, 010308 nuclear & particles physics, Fission, QC1-999, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Particle detector, Nuclear physics, Uranium-238, Chemical physics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Neutron, 010306 general physics, Nuclear Experiment, Excitation
Abstract

Expérience GANIL/VAMOS-LISE; International audience; Two fission experiments have been performed at GANIL using 238U beams at different energies and light targets. Different fissioning systems were produced with excitation energies from 10 to 230 MeV and their decay by fission was investigated with GANIL spectrometers. Preliminary fission-fragment isotopic distributions have been obtained. The evolution with impinging energy of their properties, the neutron excess and the width of the neutron-number distributions, gives important insights into the dynamics of fusion-fission mechanism.

Published
2012

9. Micromegas detector developments for MIMAC

Author

J. P. Richer, G. Bosson, J.P. Mols, David Calvet, J. Billard, F.J. Iguaz, F. Mayet, J. Pancin, T. Papaevangelou, O. Guillaudin, D. Santos, David Attié, E. Ferrer-Ribas, J. L. Bouly, L. Lebreton, F. Druillole, Y. Giomataris, C. Grignon, Paul Colas, Ch. Fourel, C. Golabek, O. Bourrion, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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 Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de radioprotection et de sûreté nucléaire (IRSN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), MIMAC, 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 Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, 01 natural sciences, Optics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, business.industry, Plane (geometry), Track (disk drive), Detector, General Engineering, Astronomy and Astrophysics, MicroMegas detector, Alpha particle, Instrumentation and Detectors (physics.ins-det), [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Space and Planetary Science, business, Astrophysics - Instrumentation and Methods for Astrophysics, Large size
Abstract

The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC. The recent Micromegas efforts towards building a large size detector will be described, in particular the characterization measurements of a prototype detector of 10 $\times$ 10 cm$^2$ with a 2 dimensional readout plane. Track reconstruction with alpha particles will be shown., 8 pages, 7 figures Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011; corrections on author affiliations

Published
2011

10. Characterization of monoenergetic low energy neutron fields with the µTPC detector

Author

C. Golabek, J. Billard, C. Grignon, G. Bosson, O. Bourrion, O. Guillaudin, L. Lebreton, F. Mayet, M. Petit, J.-P. Richer, D. Santos, Marianne E. Hamm, Robert W. Hamm, Laboratoire de Métrologie et de Dosimétrie des Neutrons (LMDN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Bonner sphere, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Neutron scattering, 01 natural sciences, 7. Clean energy, Neutron temperature, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Nuclear physics, Neutron generator, 0103 physical sciences, Neutron cross section, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron source, Neutron detection, Neutron, Nuclear Experiment, 010303 astronomy & astrophysics
Abstract

The AMANDE facility produces monoenergetic neutron fields from 2 keV to 20 MeV for metrological purposes. To be considered as a reference facility, fluence and energy distributions of neutron fields have to be determined by primary measurement standards. For this purpose, a micro Time Projection Chamber is being developed to be dedicated to measure neutron fields with energy ranging from 2 keV up to 1 MeV. We present simulations showing that such a detector, which allows the measurement of the ionization energy and the 3D reconstruction of the recoil nucleus, provides the determination of neutron energy and fluence of such low energy neutron fields.

Published
2011

11. Production and measurement of neutron reference fields: the amande facility and MIMAC prototype as neutron detection system

Author

D. Santos, C. Grignon, F. Mayet, L. Lebreton, O. Guillaudin, J.-P. Richer, J. Billard, C. Golabek, O. Bourrion, G. Bosson, S. Valdenaire, M. Petit, Institut de radioprotection et de sûreté nucléaire (IRSN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and MIMAC

Subjects
Physics, Time projection chamber, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::High Energy Astrophysical Phenomena, Detector, General Engineering, Astronomy and Astrophysics, MicroMegas detector, 01 natural sciences, Fluence, Neutron temperature, Metrology, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Space and Planetary Science, 0103 physical sciences, Neutron detection, Neutron, Nuclear Experiment, 010303 astronomy & astrophysics
Abstract

The AMANDE facility produces mono-energetic neutron fields from 2 keV to 20 MeV with a metrological quality (Gressier et al. ). To be considered as a standard facility, fluence and energy distributions of neutron fields have to be mastered, i.e. measured by primary detector standards. For this purpose, a new gaseous Time Projection Chamber ( μ TPC ) is being developed within the MIMAC project devoted to directional Dark Matter search (Billard et al. ). The μ TPC is dedicated to measure neutron fields from 2 keV up to 1 MeV. The measurement strategy requires track reconstruction of recoiling nuclei down to a few keV, which can be achieved with low pressure gaseous detectors. Hence the energy must be measured precisely and the track of the recoiling nucleus must be 3D reconstructed. This is achieved with a low pressure micropattern gaseous detector (a pixelized bulk micromegas) equipped with a self triggered electronics able to perform the anode sampling at a 50 MHz frequency. Methods to measure fluence and neutron energy with the TPC have been described.

Published
2011

12. MIMAC : A micro-tpc matrix for directional detection of dark matter

Author

J.L. Bouly, J. Billard, A. Delbart, F. Mayet, I. Giomataris, Daniel Santos, J. P. Richer, C. Grignon, C. Golabek, J.P. Mols, G. Bosson, Efrain J. Ferrer, L. Lebreton, Ch. Fourel, O. Bourrion, O. Guillaudin, F.J. Iguaz, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Métrologie et de Dosimétrie des Neutrons (LMDN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), MIMAC, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Laboratoire de Métrologie et de Dosimétrie des Neutrons (IRSN/PRP-HOM/SDE/LMDN)

Subjects
Physics, History, Particle physics, Time projection chamber, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, 3D reconstruction, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, 01 natural sciences, Computer Science Applications, Education, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Matrix (mathematics), Low energy, WIMP, 0103 physical sciences, Neutron, 010303 astronomy & astrophysics, Energy (signal processing), ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Directional detection of non-baryonic Dark Matter is a promising search strategy for discriminating WIMP events from background. However, this strategy requires both a precise measurement of the energy down to a few keV and 3D reconstruction of tracks down to a few mm. To achieve this goal, the MIMAC project has been developed. It is based on a gaseous micro-TPC matrix, filled with CF4 and CHF3. The first results on low energy nuclear recoils (H, F) obtained with a low mono-energetic neutron field are presented. The discovery potential of this search strategy is discussed and illustrated by a realistic case accessible to MIMAC., 6 pages, Proc. of the fifth international symposium on large TPCs for low energy rare event detection, Paris, France, Dec. 2010. To appear in Journal of Physics

Published
2011

13. Micromegas detector developments for Dark Matter directional detection with MIMAC

Author

Ioannis Giomataris, Paul Colas, C. Golabek, David Attié, D. Santos, J. Billard, F. Druillole, F. Mayet, J. P. Richer, G. Bosson, E. Ferrer-Ribas, J. L. Bouly, Ch. Fourel, J.P. Mols, O. Bourrion, C. Grignon, O. Guillaudin, F.J. Iguaz, L. Lebreton, David Calvet, J. Pancin, T. Papaevangelou, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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 Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Métrologie et de Dosimétrie des Neutrons (LMDN), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), MIMAC, 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 Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Laboratoire de Métrologie et de Dosimétrie des Neutrons (IRSN/PRP-HOM/SDE/LMDN)

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, chemistry.chemical_element, 01 natural sciences, Optics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation, Mathematical Physics, Physics, Argon, Time projection chamber, 010308 nuclear & particles physics, business.industry, Plane (geometry), Track (disk drive), Detector, MicroMegas detector, Instrumentation and Detectors (physics.ins-det), Alpha particle, 3. Good health, chemistry, business
Abstract

The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC using a high precision Micromegas readout plane. We will describe in detail the recent developments done with bulk Micromegas detectors as well as the characterisation measurements performed in an Argon(95%)-Isobutane(5%) mixture. Track measurements with alpha particles will be shown., Comment: 12 pages, 12 figures

Published
2011

14. Investigation of deep inelastic reactions in 238U + 238U at Coulomb barrier energies

Author

C. Golabek, S. Heinz, W. Mittig, F. Rejmund, A. C. C. Villari, S. Bhattacharyva, D. Boilley, G. De France, A. Drouart, L. Gaudefroy, L. Giot, V. Maslov, M. Morjean, G. Mukherjee, Yu. Penionzkevich, P. Roussel-Chomaz, C. Stodel, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Variable Energy Cyclotron Centre, Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique Théorique et Appliquée (DPTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), 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 Mines Nantes (Mines Nantes)-Université de Nantes (UN)-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, Proton, 010308 nuclear & particles physics, Electric potential energy, Coulomb barrier, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Nuclear fusion, Neutron, Atomic physics, 010306 general physics, Nucleon, Nuclear Experiment, Beam (structure)
Abstract

Expérience GANIL E511 , Spectromètre VAMOS; We investigated deep inelastic reactions in 238U+238U collisions at 6.09, 6.49, 6.91, 7.1 and 7.35×AMeV at the VAMOS spectrometer (GANIL). A large transfer of neutrons and protons was observed at all beam energies. For a transfer of more than 10 nucleons the total kinetic energy of the detected fragments becomes independent of the beam energy and reaches values far below the Coulomb barrier for spherical fragments. This points to the formation of a di-nuclear system in the entrance channel which develops an elongated shape and a strong neck. For such reactions we expect an enhanced lifetime of the di-nuclear system which is significantly longer than the time scale for elastic and quasi-elastic reactions. Different theoretical approaches predict delay times of more than 5 × 10−21 s for a subset of our data.

Published
2010

15. Minor actinide fission induced by multi-nucleon transfer reaction in inverse kinematics

Author

Enrique Casarejos, B. Jurado, F. Rejmund, M. Caamano, K.-H. Schmidt, G. Barreau, T. Roger, L. Gaudefroy, A. Lemasson, B. Fernández-Domínguez, C. Schmitt, A. Navin, C. Golabek, A. Shrivastava, X. Derkx, C.O. Bacri, J. Benlliure, M. Rejmund, L. Audouin, J. Taieb, 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), Gesellschaft fur Schwerionenforschung, Darmstadt, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidade de Santiago de Compostela [Spain] (USC ), Oliver Lodge Laboratory, University of Liverpool, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), L. Bonneau, N. Dubray, F. Gunsing, B. Jurado, 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 Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Cold fission, 010308 nuclear & particles physics, Chemistry, Fission, Physics, QC1-999, Nuclear Theory, Radioactive waste, Minor actinide, Fission product yield, Actinide, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Fast fission, Nuclear physics, 0103 physical sciences, 010306 general physics, Long-lived fission product, Nuclear Experiment
Abstract

Expérience GANIL; International audience; In the framework of nuclear waste incineration and design of new generation nuclear reactors, experimental data on fission probabilities and on fission fragment yields of minor actinides are crucial to design prototypes. Transfer-induced fission has proven to be an efficient method to study fission probabilities of actinides which cannot be investigated with standard techniques due to their high radioactivity. We report on the preliminary results of an experiment performed at GANIL that investigates fission probabilities with multi-nucleon transfer reactions in inverse kinematics between a 238U beam on a 12C target. Actinides from U to Cm were produced with an excitation energy range from 0 to 30 MeV. In addition, inverse kinematics allowed to characterize the fission fragments in mass and charge. A key point of the analysis resides in the identification of the actinides produced in the different transfer channels. The new annular telescope SPIDER was used to tag the target-like recoil nucleus of the transfer reaction and to determine the excitation energy of the actinide. The fission probability for each transfer channel is accessible and the preliminary results for 238U are promising.

Published
2009

16. Study of heavy di-nuclear systems

Author

Dieter Ackermann, W. Mittig, V. F. Comas, J. A. Heredia, S. Heinz, Jadambaa Khuyagbaatar, S. Hofmann, Antonio Villari, C. Golabek, F. P. Heßberger, R. Mann, Bettina Lommel, Birgit Kindler, F. Rejmund, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), 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
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, SHELL model, Dissipation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Atomic physics, 010306 general physics, Nucleon, Beam (structure)
Abstract

We investigated di-nuclear system formation with successive nucleon transfer at beam energies at and below the barrier in the superheavy systems 64 28 Ni + 207 82 Pb ( Z p r o j . + Z t a r g e t = 110 ) and 238 92 U + 238 92 U ( Z p r o j . + Z t a r g e t = 184 ). In both collision systems we observed a massive transfer of nucleons correlated with the dissipation of the entire kinetic energy. The results are in accordance with the two-center shell model which assumes the formation of a di-nuclear system as first step to fusion. The experiments have been performed at the velocity filter SHIP (GSI) and at the VAMOS spectrometer (GANIL).

Published
2009

17. Isotopic resolution of fission fragments from [sup 238]U+[sup 12]C transfer and fusion reactions

Author

M. Caamaño, F. Rejmund, X. Derkx, K.-H. Schmidt, L. Andouin, C.-O. Bacri, G. Barreau, J. Benlliure, E. Casarejos, B. Fernández-Domínguez, L. Gaudefroy, C. Golabek, B. Jurado, A. Lemasson, A. Navin, M. Rejmund, T. Roger, A. Shrivastava, C. Schmitt, J. Taieb, Audrey Chatillon, Herbert Faust, Gabriele Fioni, Dominique Goutte, and Héloise Goutte

Subjects
Nuclear physics, Cold fission, Cluster decay, Chemistry, Fission, Nuclear Theory, Transactinide element, Nuclear fusion, Fission product yield, Atomic number, Nuclear Experiment, Kinetic energy
Abstract

Recent results from an experiment at GANIL, performed to investigate the main prop- erties of fission-fragment yields and energy distributions in different fissioning nuclei as a function of the excitation energy, in a neutron-rich region of actini des, are presented. Transfer reactions in inverse kinematics between a 238 U beam and a 12 C target produced different actinides, within a range of excitation energy below 30 MeV. These fissioning nuc lei are identified by detecting the target-like recoil, and their kinetic and excitation energ y are determined from the reconstruction of the transfer reaction. The large-acceptance spectrometer VAMOS was used to identify the mass, atomic number and charge state of the fission fragments in flig ht. As a result, the characteristics of the fission-fragment isotopic distributions of a variety of neutron-rich actinides are observed for the first time over the complete range of fission fragments.

Published
2009

18. Prompt gamma-ray spectroscopy of isotopically identified fission fragments

Author

F. Rejmund, J. Benlliure, G. Barreau, Enrique Casarejos, C.O. Bacri, B. Fernández-Domínguez, Kamila Sieja, L. Gaudefroy, A. Navin, C. Schmitt, A. Shrivastava, A. Lemasson, C. Golabek, X. Derkx, T. Roger, M. Rejmund, J. Taieb, B. Jurado, M. Caamano, L. Audouin, Karl-Heinz Schmidt, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut für Kernphysik, Technische Universität Darmstadt (TU Darmstadt), 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 d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), USC, Universidad de Santiago de Compostela, Universidad Santiago de Compostela, 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), Technische Universität Darmstadt - Technical University of Darmstadt (TU Darmstadt), 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 Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Universidade de Santiago de Compostela [Spain] (USC )

Subjects
Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Fission, 25.70.Jj, 23.20.Lv, 21.60.Cs, 27.60.+j, Gamma ray, Analytical chemistry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Uranium-238, 0103 physical sciences, Neutron, Gamma spectroscopy, 010306 general physics, Spectroscopy, Spin (physics), Nuclear Experiment
Abstract

Measurements of prompt Doppler-corrected deexcitation gamma rays from uniquely identified fragments formed in fusion-fission reactions of the type 12C(238U,134Xe)Ru are reported. The fragments were identified in both A and Z using the variable-mode, high-acceptance magnetic spectrometer VAMOS. States built on the characteristic neutron configurations forming high-spin isomers (7- and 10+) in 134Xe are presented and compared with the predictions of shell-model calculations using a new effective interaction in the region of Z>=50 and N

Published
2009

19. Search for a Long Living Giant System in $^{238}$U+$^{238}$U Collisions near the Coulomb Barrier

Author

C. GOLABEK, A. C. C. VILLARI, S. HEINZ, W. MITTIG, S. BHATTACHARYYA, D. BOILLEY, G. DE FRANCE, A. DROUART, L. GAUDEFROY, L. GIOT, A. MARCHIX, V. MASLOV, M. MORJEAN, G. MUKHERJEE, A. NAVIN, YU. PENIONZKEVICH, F. REJMUND, M. REJMUND, P. ROUSSEL-CHOMAZ, C. STODEL, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), VEC Center I, VEC Center, Université de Caen Normandie (UNICAEN), Normandie Université (NU), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), 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 Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Excitation function, Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, General Physics and Astronomy, Coulomb barrier, Kinematics, Dissipation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Collision, 01 natural sciences, 7. Clean energy, Nuclear physics, Cardinal point, 0103 physical sciences, Atomic physics, 010306 general physics, Nucleon, Nuclear Experiment
Abstract

We searched for a long-living component in the collision of 238U+238U between 6.09 A and 7.35 A MeV. The experiment was performed at GANIL using the spectrometer VAMOS, tuned for observing reactions with kinematics similar to quasi-fission events. Theoretical calculations indicate that reactions with strong energy dissipation and a large number of transferred nucleons are correlated to a time delay in the decay of the giant system. We detected events of such type in the focal plane of VAMOS. These events present an excitation function increasing with bombarding energy.

Published
2008

20. Search for a long lived component in the reaction U+U near the Coulomb barrier

Author

A. C. C. Villari, C. Golabek, W. Mittig, S. Heinz, S. Bhattacharyya, D. Boilley, R. Dayras, G. De France, A. Drouart, L. Gaudefroy, L. Giot, A. Marchix, V. Maslov, M. Morjean, G. Mukherjee, A. Navin, Yu. Penionzkevich, F. Rejmund, M. Rejmund, P. Roussel-Chomaz, C. Stodel, M. Winkler, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Université de Caen Normandie (UNICAEN), Normandie Université (NU), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Arnould M., Lewitowicz M., Emling H., Akimune H., Ohta M., Utsunomiya H., Wada T., Yamagata T., VAMOS, 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 Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Excitation function, 25.85.-w, 25.90+k, Spectrometer, 010308 nuclear & particles physics, Fission, Component (thermodynamics), Chemistry, Coulomb barrier, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Collision, 01 natural sciences, 7. Clean energy, Nuclear physics, giant system, Cardinal point, 0103 physical sciences, fission, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

Expérience GANIL; International audience; We performed an experiment to search for a signature of a long living component in the collision of $^{238}$U + $^{238}$U between 6.09 and 7.35A MeV. The experiment was performed at GANIL using the spectrometer VAMOS, tuned for observing reactions with kinematics similar to fusion-fission events. Theoretical calculations indicate that if a long living component would exist for this reaction, the most probable fission channel of such a giant system would be via the emissionof quasi-lead nuclei. We detected events of such a category in the focal plane of VAMOS. These events present an excitation function growing as a function of the bombarding energy.

Published
2007

21. Collision dynamics of two 238U atomic nuclei.

Author

Golabek C and Simenel C

Abstract

Collisions of actinide nuclei form, during very short times of few 10;{-21} s, the heaviest ensembles of interacting nucleons available on Earth. Such collisions have been proposed as an alternative way to produce heavy and superheavy elements. They are also used to produce superstrong electric fields by the huge number of interacting protons to test spontaneous positron-electron (e;{+}e;{-}) pair emission predicted by the quantum electrodynamics theory. The time-dependent Hartree-Fock theory is used to study collision dynamics of two 238U atomic nuclei. In particular, the role of nuclear deformation on collision time and on reaction mechanisms such as nucleon transfer is emphasized. The highest collision times (approximately 4 x 10;{-21} s at 1200 MeV) should allow experimental signature of spontaneous e;{+}e;{-} emission in case of bare uranium ions. Surprisingly, we also observe ternary fission due to purely dynamical effects.

Published
2009
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