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1. RIB production by photofission in the framework of the ALTO project: first experimental measurements and Monte-Carlo simulations

Author: J. Lesrel, M. Raynaud, F. Ibrahim, A.C. Mueller, B. Roussière, J.F. LeDu, M. Ducourtieux, D. Guillemaud Mueller, D. Verney, S. Franchoo, A. Said, S. Essabaa, S. Wurth, C. Lau, M. Cheikh Mhamed, M. Lebois, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Fission, Nuclear Theory, Monte Carlo method, Photofission, chemistry.chemical_element, Uranium, 01 natural sciences, 7. Clean energy, Nuclear physics, chemistry.chemical_compound, chemistry, Valley of stability, 0103 physical sciences, Cathode ray, Physics::Accelerator Physics, Uranium carbide, Nuclear Experiment, 010306 general physics, Instrumentation, Beam (structure)
Abstract: The ALTO facility (Accelerateur Lineaire aupres du Tandem d’Orsay) has been built and is now under commissioning. The facility is intended for the production of low energy neutron-rich ion-beams by ISOL technique. This will open new perspectives in the study of nuclei very far from the valley of stability. Neutron-rich nuclei are produced by photofission in a thick uranium carbide target (UC x ) using a 10 μA, 50 MeV electron beam. The target is the same as that already had been used on the previous deuteron based fission ISOL setup (PARRNE [ F. Clapier et al., Phys. Rev. ST-AB (1998) 013501. ]). The intended nominal fission rate is about 10 11 fissions/s. We have studied the adequacy of a thick carbide uranium target to produce neutron-rich nuclei by photofission by means of Monte-Carlo simulations. We present the production rates in the target and after extraction and mass separation steps. The results from Monte-Carlo simulations are compared to experimental data either with the ALTO facility (in the first step of commissioning, i.e. 100 nA of the electron beam current intensity), or with fast-neutron-induced fission generated from a 26 MeV deuteron beam. The results obtained support the suitability of FLUKA simulation code used to describe all the photofission process with an electron beam energy of 50 MeV.
Published: 2008
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2. The ALTO facility at IPN Orsay and study of neutron rich nuclei in the vincinity of $^{78}$Ni

Author: D. Guillemaud Mueller, J. Sauvage, C. Lau, A.C. Mueller, S. Essabaa, J. F. Le Du, M.C. Mhamed, F. Ibrahim, F. Le Blanc, M. Lebois, S. Franchoo, B. Roussière, S. Gales, D. Verney, 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), 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), C.A. Bertulani, P.R.S. Gomes, M.S. Hussein and A. Szanto de Toledo, ALTO, 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, Fission, Photofission, Particle accelerator, Tandem accelerator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, chemistry.chemical_compound, chemistry, Deuterium, law, 0103 physical sciences, Uranium carbide, Neutron, 010306 general physics, Beam (structure)
Abstract: International audience; The ALTO facility at IPN Orsay is based on a linear electron accelerator (50 MeV, 10μA) dedicated to the production of neutron rich radiactive beams by photofission of a thick uranium carbide target paced on an ISOL line. The construction of the facility has ended in december 2005 and the first on-line tests have been carried out in mid-2006. The production of fission fragments after separation have been measured and are similar to the calculated predictions. Previously, using the same ISOL line, neutron rich nuclei in the vincinity of 78Ni have been produced and studied using the deuteron beam available at the Tandem accelerator in Orsay. First results on excited states in $^{83}_{32}Ge_{51}$ and $^{81}_{31}Ge_{50}$ have been obtained and discussed in the frame of the shell model.
Published: 2006
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3. Production of Mass-Separated Fission Fragment Beams at ALTO

Author: S. Essabaa, D. Guillemaud-Mueller, M. Raynaud, C. Vogel, A.C. Mueller, S. Gales, M. Lebois, M. Cheikh Mhamed, A. Said, S. Franchoo, J.M. Curaudeau, M. Ducourtieux, C. Lau, D. Verney, F. Ibrahim, B. Roussière, J. Lesrel, 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), Yu. E. Penionzhkevich, E. A. Cherepanov, and ALTO
Subjects: Isotope, Chemistry, Fission, Radiochemistry, Photofission, neutrons, Isotopes of krypton, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Isotope separation, law.invention, 25.85.Jg, Nuclear physics, law, Isotopes of tin, 0202 electrical engineering, electronic engineering, information engineering, Isotopes of xenon, 020201 artificial intelligence & image processing, Neutron, photofission
Abstract: International audience; Yields of neutron-rich isotopes produced by the photofission were measured at the ISOL ALTO facility. The identification was achieved by a combined measurement of beta and gamma-rays. Production rates for Xe, Kr, Sn, In and I isotopes are presented here. In parallel, empirical estimations for the yields based on the PARRNe experimental data and the results provided by a very recent FLUKA simulation are presented.
Published: 2006
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4. Study of the $N=50$ major shell effect close to $^{78}$Ni : First evidence of a weak coupling structure in $^{83}_{32}$Ge$_{51}$ and three-proton configuration states in $^{81}_{31}$Ga$_{50}$

Author: D. Guillemaud-Mueller, O. Bajeat, F. Ibrahim, C. Donzaud, S. Gales, B. Roussière, O. Perru, L. Gaudefroy, F. Le Blanc, S. Essabaa, C. Lau, J. Sauvage, A.C. Mueller, Ch. Bourgeois, H. Lefort, F. Pougheon, F. Hammache, O. Sorlin, D. Verney, M. Ducourtieux, 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), 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: History, Proton, Fission, Band gap, Shell (structure), Structure (category theory), FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Education, 0103 physical sciences, Nuclear structure, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, 21.60.Cs, 23.20.Lv, 27.50.+e, Nuclear shell model, Coupling (probability), Computer Science Applications, nuclear shell model, magic numbers, Atomic physics, beta-decay
Abstract: New levels were attributed to $^{81}\_{31}$Ga$\_{50}$ and $^{83}\_{32}$Ge$\_{51}$ which were fed by the $\beta$-decay of their respective mother nuclei $^{81}\_{30}$Zn$\_{51}$ and $^{83}\_{31}$Ga$\_{52}$ produced by fission at the "PARRNe" ISOL set-up installed at the Tandem accelerator of the Institut de Physique Nucl\'eaire, Orsay. We show that the low energy structure of $^{81}\_{31}$Ga$\_{50}$ and $^{83}\_{32}$Ge$\_{51}$ can easily be explained within the natural hypothesis of a strong energy gap at N=50 and a doubly-magic character for $^{78}$Ni., Comment: 2 pages, pdf file, To be published in the Proceedings of "International Symposium on Structure of Exotic Nuclei and Nuclear Forces (SENUF 06)", March 2006, Tokyo, Japan
Published: 2006
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5. Exploratory analysis of a neutron-rich nuclei source based on photo-fission

Author: S. Kandri-Rody, J. Proust, F. Ibrahim, L. Groza, O. Bajeat, M. Mirea, A.C. Mueller, S. Essabaa, F. Clapier, N. Pauwels, 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), and Robert, Suzanne
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Cold fission, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Fission, Nuclear Theory, Bremsstrahlung, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Nuclear physics, Dipole, 0103 physical sciences, Radiative transfer, Neutron, 010306 general physics, Nuclear Experiment, Instrumentation
Abstract: A source of neutron rich ions can be conceived through the photo-fission process. An exploratory study of such a source is realized. A survey of the radiative electron energy loss theory is reported in order to estimate numerically the bremsstrahlung production of thick targets. The resulted bremsstrahlung angular and energy theoretical distributions delivered from W and UCx thick converters are presented and compared with previous results. Some quantities as the number of fission events produced in the fissionable source and the energy loss in the converters are also reported as function of the geometry of the combination and the incident electron energy. An attempt of comparison with experimental data shows a quantitative agreement. This study is focussed on initial kinetic energies of the electron beam included in the range 30–60 MeV, suitable for the production of large radiative γ-ray yields able to induce the 238 U fission through the giant dipole resonance. A confrontation with the number of fission events produced in the frame of the fast neutron induced fission method indicates that the photo-fission can be a competitive concept.
Published: 2003

6. Photofission for the production of radioactive beams: experimentral data from an on-line measurement

Author: O. Bajeat, J. Proust, O. Sorlin, M. Mirea, F. Ibrahim, H. Safa, F. Pougheon, O. Perru, A.C. Mueller, G. Le Scornet, M. G. Saint Laurent, J. Obert, C. Lau, D. Carminati, Jacques Lettry, C. Donzaud, M. Ducourtieux, J.M. Buhour, F. Hosni, Louis Rinolfi, A. Joinet, J.C. Potier, N. Pauwels, H.L. Ravn, F. Clapier, Ulli Köster, M. Santana-Leitner, S. Essabaa, J.M. Dufour, S. Galès, D. Verney, D. Guillemaud-Mueller, G. Rossat, H. Lefort, O. Hubert, 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), 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, Large Hadron Collider, 010308 nuclear & particles physics, Fission, Nuclear Theory, Photofission, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Cathode ray, Physics::Accelerator Physics, Nuclear fusion, Neutron, Nuclear Experiment, 010306 general physics, Line (formation)
Abstract: A PARRNe 1 experiment (Production d'Atomes Radioactifs Riches en Neutrons) aimed at the production of neutron-rich radioactive noble gases produced by photofission has been performed at CERN. The LEP Pre-Injector (LPI) has been used to deliver a 50 MeV electron beam. The results obtained show clearly that the use of an electron beam to produce neutron-rich fission fragments for futur RNB facilities is an option that should not be neglected.
Published: 2002
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7. Detection of neutron clusters

Author: M. Freer, F. de Oliveira Santos, Thomas Nilsson, Graziele De Sousa Costa, S. P. G. Chappell, B. R. Fulton, N. A. Orr, J. C. Angélique, Fred Sarazin, O. Dorvaux, Karin Markenroth, Leif Axelsson, K. Riisager, S. Grévy, G. Giardina, N. M. Clarke, M. J. G. Borge, Giovanni Fazio, D. Guillemaud-Mueller, B. Heusch, Gunnar Nyman, B. Benoit, Alain Ninane, F. M. Marqués, M. G. Saint Laurent, U. C. Bergmann, E. de Goes Brennand, F. Hanappe, A.C. Mueller, I. Piqueras, M. J. Lopez, S. Leenhardt, L. Stuttge, M. Labiche, N. Curtis, M. Lewitowicz, W. N. Catford, O. Sorlin, C. Le Brun, Björn Jonson, A. D'Arrigo, S. M. Singer, 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), 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), 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), 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Nuclear Theory, Scintillator, Few-body systems, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, 3. Good health, Nuclear physics, 0103 physical sciences, Tetraneutron, Cluster (physics), Neutron, [PACS]Few-body systems, [PACS]Nucleon distributions and halo features, Nuclear Experiment, 010306 general physics, Nucleon, [PACS]Nuclear reactions involving few-nucleon systems
Abstract: 10 pages, 2 tables, 13 figures.--PACS nrs.: 21.45.1v, 25.10.1s, 21.10.Gv.--ArXiv pre-print available at: http://arxiv.org/abs/nucl-ex/0111001, A new approach to the production and detection of bound neutron clusters is presented. The technique is based on the breakup of beams of very neutron-rich nuclei and the subsequent detection of the recoiling proton in a liquid scintillator. The method has been tested in the breakup of intermediate energy (30-50 MeV/nucleon) Li-11, Be-14, and B-15 beams. Some six events were observed that exhibit the characteristics of a multineutron cluster liberated in the breakup of Be-14, most probably in the channel Be-10+(4)n. The various backgrounds that may mimic such a signal are discussed in detail., This work was funded under the auspices of the IN2P3-CNRS (France) and EPSRC (United Kingdom). Additional support from the ALLIANCE program (Ministère des Affaires Etrangères and British Council) and the Human Capital and Mobility Program of the European Community (Contract No. CHGE-CT94-0056) is also acknowledged.
Published: 2002
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8. Future prospects on RNB production using photo fission

Author: O. Bajeat, M. Ducourtieux, J.M. Buhour, C. Donzaud, G. Rossat, J. Obert, D. Verney, H. Lefort, O. Hubert, M. Santana-Leitner, J. Proust, H. Safa, O. Perru, A.C. Mueller, J.M. Dufour, S. Galès, F. Pougheon, U. Koester, D. Guillemaud-Mueller, A. Joinet, N. Pauwels, D. Carminati, H.L. Ravn, F. Hosni, F. Ibrahim, S. Essabaa, F. Clapier, O. Sorlin, J.C. Potier, M. Mirea, G. Le Scornet, J. Lettry, M. G. Saint Laurent, C. Lau, Louis Rinolfi, 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), and Aeystoe J. Dendooven P. Jokinen A. Leino M.
Subjects: Physics, Radioactive ion beams, Large Hadron Collider, 010308 nuclear & particles physics, Fission, Nuclear engineering, 0103 physical sciences, Photon beams, Neutron, 010306 general physics, 01 natural sciences, 7. Clean energy
Abstract: The PARRNe (Production d’Atomes Radioactifs Riches Neutrons) R&D program is dedicated to the determination of the best conditions for the production of neutron-rich beam in prospect of the SPIRAL2 project. A complete description of this program, its subdivisions (PARRNe 0, 1 and 2 sub-programs) and the different experimental setup involved can be found in [1,2]. An experiment using the “PARRNE 1” procedure aimed at measuring on-line production of rare gases was performed at CERN.
Published: 2001

9. Changes in neutron shell closures of light very neutron-rich nuclei

Author: F. Sarazin, G. Thiamová, R. Anne, Oleg B. Tarasov, F. Azaiez, Robert Page, D. Ridikas, A.T. Reed, J. C. Angéligue, F. Pougheon, A. Gillibert, A.C. Mueller, J. Mrazek, Yu. Ts. Oganessian, M. Lewitowicz, Hiroyoshi Sakurai, Zhongzhou Ren, F. Nowacki, M. G. Saint-Laurent, F. de Oliveira, P. Roussel-Chomaz, E. Caurier, N. A. Orr, C. Borcea, W. Mittig, J. S. Winfield, Z. Dlouhý, A. S. Lalleman, G. Auger, S. Grévy, S. M. Lukyanov, D. Guillemaud-Mueller, A. de Vismes, O. Sorlin, Yu. E. Penionzhkevich, D. Baiborodin, H. Savajols, M. J. Lopez-Jimenez, 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 Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Isotope, Silicon, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Binding energy, Nuclear Theory, General Physics and Astronomy, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Instability, Nuclear physics, chemistry, 0103 physical sciences, Neutron, Nuclear drip line, Atomic physics, 010306 general physics, Spectroscopy, Nuclear Experiment
Abstract: We present a review of experimental studies on the properties of extremely neutron-rich nuclei (Z = 6-20, A = 20-60) near the neutron drip line. Recent data on mass measurements of neutron-rich nuclei at, GANIL, (Caen, France) and some characteristics of binding energies in this region are discussed. Being sensitive to the existence of nuclear shells separation energies S-2n together with the evidence of particle instability of doubly magic nuclei He-10 and O-28 could provide information on changes in shell closures. Particularly opening of an N = 16 shell and vanishing of the N = 20 shell for very neutron-rich isotopes is under discussion. Decay studies of these hardly accessible short-lived neutron-rich nuclei from oxygen to silicon using the in-beam gamma -ray spectroscopy are also reported.
Published: 2001

10. Radioactive Beams in France

Author: A.C. Mueller, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences, 7. Clean energy, Radioactive beam
Abstract: Radioactive Beams are produced by two different ways, In-Flight and ISOL, which, suited for quite different types of experiments, complement each other. We shall discuss the development of the In-Flight beams at the French national accelerator GANIL over the years. Consecutively, we present the new ISOL type facility SPIRAL which is now commissioned at GANIL. Subsequently, the R&D programme PARRNe of IPN Orsay for intense fission fragment beams as well as the plans to implement the acceleration of such beams at the “SPIRAL-II” facility will be outlined. We then discuss the R&D (collaboration Saclay - Orsay - Grenoble) for multi-megawatt class accelerators relevant to the plans for second generation radioactive beam facilities like the European EURISOL. Such accelerators being of great promise for other fields, a certain synergy to radioactive beams should exist. The present article gives an overview of all these activities and will stress some selected aspects.
Published: 2000

11. Interplay between nuclear structure and reaction mechanism in the production of projectile-like short-lived isomers

Author: C. Longour, O. Sorlin, Z. Janas, M. Lewitowicz, S. Franchoo, P. Van Duppen, Leif Axelsson, C. Borcea, K. P. Rykaczewski, M. Karny, A. Płochocki, D. Guillemaud-Mueller, Marc Huyse, M. G. Saint-Laurent, J. C. Angélique, H. Grawe, N. A. Orr, Th. Ethvignot, J. E. Sauvestre, M. Glogowski, M. J. Lopez-Jimenez, R. Anne, M. Pfützner, J. M. Daugas, E. Chabannat, R. Béraud, A. Nowak, Robert Grzywacz, F. De Oliveira-Santos, A.C. Mueller, J. S. Winfield, 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 Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Flores, Sylvie, 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), Sherrill B.M., 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Reaction mechanism, Projectile, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear structure, chemistry.chemical_element, Germanium, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Isomeric shift, chemistry, Fragmentation (mass spectrometry), Chemical physics, Mass spectrum, Atomic physics, health care economics and organizations
Abstract: International audience; Isomeric ratios and the momentum distributions of nuclei produced in the fragmentation of a 60AMeV 92Mo beam on a thin 27Al target have been studied. A strong dependence of the isomeric ratio on the structure of the isomer and on the reaction mechanism has been observed for the first time at intermediate energies.
Published: 2000
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12. Characteristics of neutron-rich nuclei around shell closures N=20 and 28

Author: F. Nowacki, H. Savajols, J. C. Angéligue, P. Roussel-Chomaz, D. Ridikas, A. de Vismes, A.C. Mueller, M. G. Saint-Laurent, D. Guillemaud-Mueller, Robert Page, Hiroyoshi Sakurai, M. Lewitowicz, F. Pougheon, J. Mrazek, A. S. Lalleman, F. Sarazin, E. Caurier, Z. Z. Ren, A.T. Reed, C. Borcea, F. de Oliveira, G. Auger, S. Grévy, J. S. Winfield, Z. Dlouhý, Yu. E. Penionzhkevich, W. Mittig, S. M. Lukyanov, R. Anne, O. Sorlin, A. Gillibert, D. Baiborodin, Oleg B. Tarasov, N. A. Orr, 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), 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), 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), 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), Heyd, Yvette, Normandie Université (NU)-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), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, [PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th], Nuclear and High Energy Physics, Isotope, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, Nuclear Theory, Binding energy, Nuclear structure, Shell (structure), 01 natural sciences, Spectral line, Nuclear physics, 0103 physical sciences, Mass spectrum, Neutron, Nuclear drip line, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The paper presents a review of experimental results obtained at GANIL and FLNR Dubna on the study of the particle stability of neutron-rich nuclei near the neutron drip line. Very recent data on mass measurements of neutron-rich nuclei in the range A =29–47 at GANIL and some characteristics of binding energies in this region are presented. Nuclear binding energies are very sensitive to the existence of shells and provide clear signatures of shell closures. Experiments have been mostly performed in cooperation GANIL–Orsay–Dubna–Řež–Bucharest–Liverpool.
Published: 2000

13. Two-neutron interferometry as a probe of the nuclear halo

Author: Björn Jonson, Giorgio Giardina, F. Sarazin, M. Lewitowicz, Francis Hanappe, N. M. Clarke, U. C. Bergmann, S. Leenhardt, A.C. Mueller, A. D’Arrigo, B. Heusch, M. J. Lopez, S. Grévy, F. de Oliveira Santos, S. P. G. Chappell, N. A. Orr, J. C. Angélique, O. Dorvaux, S M Singer, Karin Markenroth, Leif Axelsson, M. Freer, K. Riisager, B. Benoit, A. Ninane, I. Piqueras, B.R. Fulton, W. N. Catford, G. Costa, M. G. Saint-Laurent, M. Labiche, Louise Stuttge, M. Motta, C. Gregori, N. Curtis, C. Le Brun, D. Guillemaud-Mueller, F. M. Marqués, María José García Borge, E. de Goes Brennand, O. Sorlin, Thomas Nilsson, Göran Hugo Nyman, 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), 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), 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), 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Spatial configuration, 010308 nuclear & particles physics, Iterative method, Halo nucleus, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Dissociation (chemistry), Computational physics, Interferometry, 0103 physical sciences, Neutron, Halo, Atomic physics, 010306 general physics
Abstract: The technique of intensity interferometry is proposed as a probe of the spatial configuration of two-Neutron haloes. After exploring the sensitivity of interferometry to the n-N configuration, it is demonstrated that the application of the standard method for constructing the correlation function is not valid for halo neutrons. A new iterative method is presented and applied to measurements of the dissociation of 6He, 11Li and 14Be. The correlation functions for these systems have thus been extracted for the first time and the corresponding root-Mean-Square n-n separations estimated. The results are in agreement with the predictions of available three-Body models. (C) 2000 Published by Elsevier Science B.V.
Published: 2000
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14. Production of neutron-rich isotopes in fission of uranium induced by neutrons of 20 MeV average energy

Author: P. Jardin, Jussi Huikari, Ari Jokinen, Juha Äystö, A. Nieminen, C. Lau, Jean Vervier, M. G. Saint-Laurent, J. C. Wang, V. A. Rubchenya, Peter Dendooven, Heikki Penttilä, Kari Perajarvi, L. Lebreton, D. Vakhtin, V. Kolhinen, Wladyslaw Henryk Trzaska, A.C. Mueller, Antonio Villari, G. Lhersonneau, S. Nummela, Z. Radivojevic, G. Canchel, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Cold fission, Isotopes of uranium, 010308 nuclear & particles physics, Neutron emission, Isotopes of samarium, Nuclear Theory, Fission product yield, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Fast fission, Nuclear physics, Uranium-238, 0103 physical sciences, Physics::Accelerator Physics, Nuclear Experiment, 010306 general physics, Long-lived fission product
Abstract: In the context of a parameter study conducted by several laboratories for future European radioactive beam facilities based on fast-neutron induced fission, in particular for the SPIRAL-II project at GANIL, we have measured the yields of neutron-rich isotopes in the mass range of 88 to 144. These nuclei were obtained as fission products of natural uranium bombarded by neutrons of 20 MeV average energy emitted by a thick carbon target irradiated by 50 MeV deuterons. Yields have been measured using on-line mass separation with the ion-guide method. Compared with proton-induced fission at 25 MeV the magnitude of cross-sections, except for the symmetric region, is similar. Z-distributions of isobars have the same width, 0.7 charge units, but their maxima are shifted by about 0.8 charge units, favouring production of the neutron-richer isobars. Our data allow calculations of absolute cross-sections for fission of natural uranium induced by neutrons of about 20 MeV.
Published: 2000
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15. In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL

Author: C. Borcea, S. Leenhardt, I. Deloncle, M. G. Saint-Laurent, Z. Dlouhy, Yu-E. Penionzhkevich, M. Lewitowicz, O. Sorlin, M. Belleguic, M. J. Lopez, A. Gillibert, C. Donzaud, Ch. Bourgeois, F. Pougheon, H. Savajols, J. M. Daugas, F. Azaiez, M. Stanoiu, M. G. Porquet, F. de Oliveira, J. C. Angélique, S. Grévy, J. Kiener, Josette Duprat, D. Guillemaud-Mueller, A.C. Mueller, N. L. Achouri, J. E. Sauvestre, Yu. Sobolev, W. Shuying, 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), 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 de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Smit F.D. Lindsay R. Foertsch S.V., 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Robert, Suzanne
Subjects: Physics, Isotope, 010308 nuclear & particles physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Gamma ray, Coulomb excitation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Nuclear physics, Excited state, 0103 physical sciences, Neutron, Gamma spectroscopy, Atomic physics, Nuclear Experiment, 010306 general physics, Ground state, Mathematical Physics, Beam (structure)
Abstract: The structure of nuclei far from stability can be investigated by means of in-beam gamma spectroscopy using both stable and radioactive beams. Two such experiments have been recently performed at GANIL. i) Secondary beams of neutron-rich Ge, Zn and Ni isotopes around N=40 were produced from the fragmentation of a primary 86 Kr beam, and analyzed by means of the LISE3 spectrometer. For the transitions between the 0+ ground state and the first 2+ state, B(E2) values have been extracted from Coulomb excitation cross-section measurement. Some of the obtained results related to the effectiveness of the N=40 spherical sub-shell closure are discussed. ii) In-beam γ-spectroscopy of neutron-rich nuclei around 32Mg produced by fragmentation of 36S have been performed recently. Gamma decay of relatively higher excited states have been measured in a large number of exotic light nuclei. Preliminary results obtained in a number of neutron-rich nuclei around N=20 are presented.
Published: 1999

16. Radioactivity of neutron-rich oxygen fluorine and neon isotopes

Author: Burjan, Jouni Suhonen, N. A. Orr, A.T. Reed, S. M. Vincent, R. Anne, W. N. Catford, F. M. Marqués, M. G. Saint-Laurent, C. Borcea, J. C. Angélique, P. H. Regan, O. Sorlin, S. M. Lukyanov, J. Novák, Teemu Siiskonen, Robert Page, S. Grévy, D. Guillemaud-Mueller, F. Pougheon, R. G. Allatt, Yu. E. Penionzhkevich, E. Sokol, C. Donzaud, Z. Dlouhy, W. Trinder, A.C. Mueller, M. Lewitowicz, Oleg B. Tarasov, G. Martínez, P. J. Nolan, 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), 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Isotopes of germanium, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Internal conversion, Isotopes of neon, 13. Climate action, 0103 physical sciences, Beta particle, Isotopes of zirconium, Nuclear Experiment, 010306 general physics, Radioactive decay, Energy (signal processing)
Abstract: The $\ensuremath{\gamma}$ radiation and neutrons emitted following the $\ensuremath{\beta}$ decays of ${}^{24}\mathrm{O},$ ${}^{25--27}\mathrm{F},$ and ${}^{28\ensuremath{-}30}\mathrm{Ne}$ have been measured. The nuclides were produced in the quasifragmentation of a 2.8 GeV ${}^{36}\mathrm{S}$ beam, separated in-flight and identified through time-of-flight and energy-loss measurements. The ions were stopped in a silicon detector telescope, which was used to detect the $\ensuremath{\beta}$ particles emitted in their subsequent radioactive decay. The coincident $\ensuremath{\gamma}$ rays were measured using four large volume germanium detectors mounted close to the implantation point and the neutrons were detected using 42 ${}^{3}\mathrm{He}$ proportional counters. The measured $\ensuremath{\gamma}$-ray energy spectra are compared with shell model calculations and, where available, the level energies deduced from multinucleon transfer reactions.
Published: 1999

17. Core-breakup reactions of the halo muclei $^{11}Be$ and $^{11}Li$ : momentum distributions and shadow effects

Author: P. G. Hansen, N. A. Orr, M. H. Smedberg, R. Anne, P. Hornshøj, F. Pougheon, D. Guillemaud-Mueller, Thomas Nilsson, Leif Axelsson, K. Riisager, M. G. Saint-Laurent, Björn Jonson, A.C. Mueller, O. Sorlin, Göran Hugo Nyman, J. C. Angelique, M. Lewitowicz, S. Grévy, 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), 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, SIMPLE (dark matter experiment), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Halo nucleus, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, 7. Clean energy, Coincidence, Core (optical fiber), Momentum, Nuclear physics, 0103 physical sciences, Neutron, Halo, Atomic physics, Nuclear Experiment, 010306 general physics, Nuclear Physics
Abstract: The halo nuclei Be-11 and Li-11 have been studied in core-breakup reactions where the halo neutrons are expected to be released without a major distortion due to the reaction. The widths of the halo-neutron momentum distributions have been extracted in coincidence with He fragments, Gamma = 32 +/- 4 MeV/c, and Li fragments, Gamma = 42 +/- 4 MeV/c for Be-11 and with He fragments, Gamma =42+/-6 MeV/c for Li-11. The Be-11 breakup gives a very low neutron multiplicity of 0.38+/-0.09 which is a manifestation of the shadowing of the neutron in the core-breakup reaction. This value can be understood from a simple theoretical calculation, which also accounts for the observed transverse momentum widths at small angles. (C) 1999 Elsevier Science B.V.
Published: 1999
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18. Dripline nuclei produced by quasi-fragmentation of the $^{32,34,36}$S primary beams

Author: W. Trinder, R. D. Page, N. K. Skobelev, O. Sorlin, V. D. Toneev, A.C. Mueller, D. Baiborodin, A. S. Fomichev, Yu. Ts. Oganessian, S. M. Lukyanov, M. G. Saint-Laurent, Oleg B. Tarasov, C. Borcea, Z. Dlouhý, E. A. Sokol, M. Lewitowicz, Yu. E. Penionzhkevich, A.T. Reed, R. Kalpakchieva, D. Guillemaud-Mueller, R. Anne, 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), 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), 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: inorganic chemicals, Nuclear reaction, Physics, Nuclear and High Energy Physics, Light nucleus, Isotope, 010308 nuclear & particles physics, technology, industry, and agriculture, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Instability, Isotopes of oxygen, Nuclear physics, Fragmentation (mass spectrometry), Isotopes of neon, biological sciences, 0103 physical sciences, Physics::Accelerator Physics, lipids (amino acids, peptides, and proteins), Atomic physics, Nuclear Experiment, 010306 general physics, Beam (structure)
Abstract: Some regularities in the production of isotopes with are investigated in reactions induced by beams at on targets , and . A search for using a beam of the neutron-rich has been performed. Evidence for particle instability of was obtained. In the same experiment, the half lives of the very neutron-rich isotopes and were measured for the first time.
Published: 1999
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19. Subshell closure study at N=40 by Coulomb excitation and $\beta$-decay

Author: C. Donzaud, G. Canchel, Yu-E. Penionzhkevich, J. M. Daugas, F. Pougheon, C. Borcea, A. Gillibert, J. S. Winfield, M. G. Saint-Laurent, A. Emsalem, M. Belleguic, S. Leenhardt, R. Béraud, C. Longour, J. C. Angélique, D. Guillemaud-Mueller, F. Azaiez, A.C. Mueller, J. Kiener, Josette Duprat, Eric Chabanat, M. G. Porquet, I. Deloncle, J. E. Sauvestre, F. Marie, Yu. Sobolev, S. Grévy, C. Bourgeois, M. Lewitowicz, O. Sorlin, F. de Oliveira, N. A. Orr, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), 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 Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), 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), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Frois B.
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Closure (topology), Coulomb excitation, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences, ComputingMilieux_MISCELLANEOUS
Abstract: NESTER; International audience
Published: 1998
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20. In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL

Author: F. Pougheon, A. Gillibert, J. C. Angélique, F. Azaiez, S. Leenhardt, M. J. Lopez, Z. Dlouhy, M. Stanoiu, M. Belleguic, M. G. Porquet, W. Shuying, M. G. Saint-Laurent, N. L. Achouri, M. Lewitowicz, S. Grévy, C. Donzaud, J. Kiener, H. Savajols, N. A. Orr, Yu-E. Penionzhkevich, O. Sorlin, J. M. Daugas, C. Borcea, F. Marie, Yu. G. Sobolev, Josette Duprat, P. Roussel-Chomaz, I. Deloncle, D. Guillemaud-Mueller, A.C. Mueller, J. E. Sauvestre, W. Mittig, F. de Oliveira, Ch. Bourgeois, 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), 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Baktash C., 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), 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: Physics, Isotope, 010308 nuclear & particles physics, Gamma ray, Coulomb excitation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Neutron, Gamma spectroscopy, 010306 general physics, Ground state, Nuclear Experiment, Beam (structure)
Abstract: International audience; The structure of nuclei far from stability call be investigated by means of in-beam gamma spectroscopy using both stable and radioactive beams. A gamma -array consisting of BaF2 and Ge detectors have been used at GANIL in order to perform two of such experiments: i) Secondary beams of neutron-rich Ge, Zn and Ni isotopes around N=40 were produced from the fragmentation of a primary /sup 86/Kr beam, and analyzed by means of the LISE3 spectrometer. For the transitions between the 0/sup +/ ground state and the first 2/sup +/ state, B(E2) values have been extracted from Coulomb excitation cross-section measurement. Some of the obtained results related to the effectiveness of the N=40 spherical sub-shell closure as well as future improvements of the quality of the data are discussed. ii) In-beam gamma -spectroscopy of neutron-rich nuclei around /sup 32/Mg produced by fragmentation of /sup 36/S have been recently performed Gamma decay of relatively higher excited states have been measured in a large number of exotic light nuclei. Preliminary results obtained in a number of even-even nuclei around N=20, such as /sup 20,22/O, /sup 26,28/Ne and /sup 30,32/Mg are presented.
Published: 1998
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21. Production of nuclei in $^{32,34,36}$S-induced reactions in the energy range 6-75 MeV/A

Author: M. Lewitowicz, S. M. Lukyanov, V. Z. Maidikov, Z. Dlouhy, W. Trinder, R. Anne, Yu. Ts. Oganessian, O. Sorlin, V.D. Toneev, A.C. Mueller, Yu. E. Penionzhkevich, M. G. Saint-Laurent, C. Borcea, N. K. Skobelev, Oleg B. Tarasov, A. S. Fomichev, D. Guillemaud-Mueller, R. Kalpakchieva, D. Baiborodin, 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), Oganessian Y-T. Kalpakchieva R., 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 Robert, Suzanne
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Range (particle radiation), Isotope, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], 010308 nuclear & particles physics, Projectile, Inelastic collision, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Atomic physics, 010306 general physics, Nuclear Experiment, ComputingMilieux_MISCELLANEOUS, Energy (signal processing)
Abstract: International audience; Some regularities in the production of isotopes with 6 ≤ Z ≤ 14 are investigated in reactions induced by 32,34,36S beams at 6 < E < 75 MeV/A on targets of natC, 181Ta and 197Au. The isotope yields and the most probable fragment mass A (for a given Z) are studied as a function of target, projectile mass and energy. A comparison is made of the experimental data at low energies with calculations in the framework of the dynamical model of deep inelastic collisions. The obtained data are considered from the point of view of the feasibility of heavy ion beams for producing nuclei far from the line of stability.
Published: 1997
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22. Search for $^{28}O$ and study of neutron-rich nuclei near the N=20 shell closure

Author: W. Trinder, W. Schwab, O. Sorlin, Frédéric Nowacki, Robert Page, M. Lewitowicz, Oleg B. Tarasov, R. Anne, A.C. Mueller, S. Grévy, J. C. Angélique, C. Borcea, C. Donzaud, J. S. Winfield, M. G. Saint-Laurent, F. Pougheon, S. M. Lukyanov, N. A. Orr, Yu. Ts. Oganessian, Yu. E. Penionzhkevich, R. G. Allatt, E. Sokol, Z. Dlouhy, A.T. Reed, D. Guillemaud-Mueller, Alexander Ostrowski, 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), 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), 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), Normandie Université (NU)-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), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Isotope, 010308 nuclear & particles physics, Closure (topology), Shell (structure), Deformation (meteorology), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Beam (structure)
Abstract: A search for **O with a 78 AMeV beam of the neutron-rich isotope 36S has been performed for the first time. Evidence for the unbound character of “0 was obtained. In the same experiment the half-lives of the very neutron-rich isotopes 27,29F and 30Ne were measured and those for 28*29Ne and 30*31 Na reexamined. The results are compared to shell-model predictions and conclusions drawn regarding the extent of the region of deformation around N = 20. @ 1997 Published by Elsevier Science B.V.
Published: 1997
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23. Invariant-mass spectroscopy of $^{10}$Li and $^{11}$Li

Author: A.C. Mueller, H. Irnich, R. Kulessa, K. Riisager, A. Magel, P. G. Hansen, Thomas Nilsson, K. Stelzer, J. V. Kratz, C. Scheidenberger, Göran Hugo Nyman, Y. Leifels, Björn Jonson, Achim Richter, G. Schrieder, E. Zude, Herbert A. Simon, E. Wajda, L. V. Chulkov, D. Guillemaud-Mueller, Th. W. Elze, H. Emling, H. Lenske, Markus Zinser, M. J. G. Borge, F. Humbert, Thomas Aumann, G. Münzenberg, Hans Geissel, Olof Tengblad, J. Cub, A. Surowiec, Joachim Stroth, F. Nickel, W. Schwab, R. Holzmann, 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), and Robert, Suzanne
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Ion, 0103 physical sciences, Invariant mass, Neutron, Atomic physics, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Nucleon, Spectroscopy, Excitation, Nuclear Physics
Abstract: Break-up of secondary Li-11 ion beams (280 MeV/nucleon) on C and Pb targets into Li-9 and neutrons is studied experimentally. Cross sections and neutron multiplicity distributions are obtained, characterizing different reaction mechanisms. Invariant-mass spectroscopy for Li-11 and Li-10 is performed. The E1 strength distribution, deduced from electromagnetic excitation of Li-11 up to an excitation energy of 4 MeV comprises similar to 8% of the Thomas-Reiche-Kuhn energy-weighted sumrule strength. Two low-lying resonance-like structures are observed for Li-10 at decay energies of 0.21(5) and 0.62(10) MeV, the former one carrying 26(10)% of the strength and likely to be associated with an s-wave neutron decay. A strong di-neutron correlation in Li-11 can be discarded. Calculations in a quasi-particle RPA approach are compared with the experimental results for Li-10 and Li-11. (C) 1997 Elsevier Science B.V.
Published: 1997

24. $^{40}$Ti $\beta$ decay and the neutrino capture cross section of $^{40}$Ar

Author: S. Leenhardt, M. Lewitowicz, W. Trinder, H. E. Swanson, A.C. Mueller, R. Anne, M. Bhattacharya, A. Garcia, M. G. Saint-Laurent, D. Guillemaud-Mueller, Eric Adelberger, O. Sorlin, C. Donzaud, N. I. Kaloskamis, F. Pougheon, 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), and 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)
Subjects: Physics, ICARUS, Nuclear and High Energy Physics, Decay scheme, Proton, 010308 nuclear & particles physics, Solar neutrino, Absorption cross section, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Cross section (physics), Excited state, 0103 physical sciences, Atomic physics, Neutrino, 010306 general physics, Nuclear Physics
Abstract: 40 Ti β decay was studied at GANIL using the LISE3 spectrometer. A decay scheme was deduced from twenty-one observed β-delayed proton transitions feeding the ground and first excited states of 39 Ca. The 40 Ti half-life was found to be 51.7(6) ms. These results imply that the ICARUS 40 Ar detector has an effective absorption cross section for 8 B solar neutrinos of 14.5(4) × 10 −43 cm 2 ; 73% of the total cross section arises from Gamow-Teller transitions that were neglected in early estimates of the ICARUS efficiency.
Published: 1997
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25. Cyclotron isochronism tuning by phase measurements with a fast scintillator at very low beam intensity

Author: A.C. Mueller, L. Boy, M.H. Moscatello, D. Bibet, B. Launé, 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Cyclotron, Detector, Phase (waves), Scintillator, 01 natural sciences, Particle detector, 010305 fluids & plasmas, law.invention, Nuclear magnetic resonance, Optics, law, Physics::Plasma Physics, 0103 physical sciences, Scintillation counter, Measuring instrument, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, business, Instrumentation, Beam (structure)
Abstract: International audience; The goal of this full-scale experiment was to tune the cyclotron at very low-intensity (102 – 103 pps). A special low-intensity probe for phase measurements was built and tested in the GANIL SSC2 cyclotron. It is based on a fast plastic scintillator and mounted on a radial probe. Using this detector the phase extension and the central phase of the beam were measured and the cyclotron isochronism was accurately tuned.
Published: 1997
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26. $^8$B studied as a secondary beam at Ganil

Author: N. K. Skobelev, C. Borcea, A.J. Kordyasz, D. Guillemaud-Mueller, A. Fomitchev, V. Borrel, S. M. Lukyanov, J.M. Corre, P. Roussel-Chomaz, F. Carstoiu, R. Anne, Oleg B. Tarasov, Z. Dlouhy, Yu. E. Penionzhkevich, H. Keller, M. Lewitowicz, F. Negoita, D. Bazin, M. G. Saint-Laurent, A.C. Mueller, O. Sorlin, Blanchet, Marie-Christine, 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), 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), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, 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), Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), 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: Diffraction, Physics, Nuclear and High Energy Physics, Silicon, Spectrometer, 010308 nuclear & particles physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Dissociation (chemistry), law.invention, Nuclear physics, Telescope, chemistry, law, 0103 physical sciences, Coulomb, Halo, Atomic physics, Nuclear Experiment, 010306 general physics, ComputingMilieux_MISCELLANEOUS
Abstract: The LISE spectrometer at GANIL has been used to form a 8 B secondary beam. Using a multiple silicon telescope, data have been obtained for the reaction and break-up cross sections, as well as for the parallel momentum distribution of 7 Be from break-up. For the first time, separate contributions to the break-up of diffraction and/or Coulomb dissociation and absorption mechanisms have been determined. The ensemble of data supports the existence in 8 B of a “pigmy” halo.
Published: 1997
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27. Neutrons from the breakup of $^{19}$C

Author: P. G. Hansen, E. Liegard, M. H. Smedberg, G. Bizard, D. Guillemaud-Mueller, W. N. Catford, F. M. Marqués, B. Heusch, Y. Schutz, M. G. Saint-Laurent, G. Martınez, N. A. Orr, A.C. Mueller, D. D. Warner, F. Hanappe, Björn Jonson, M. Lewitowicz, Thomas Nilsson, Alain Ninane, J. C. Angélique, Leif Axelsson, C. Le Brun, Martin Freer, O. Sorlin, K. Riisager, Göran Hugo Nyman, G. J. Gyapong, L. Stuttge, F. Pougheon, B. Petersen, F. Lefebvres, N. M. Clarke, François-René Lecolley, S. Grévy, G.J. Costa, 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), 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 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), 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), Normandie Université (NU)-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), 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), 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, Nuclear Theory, Tantalum, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Breakup, 01 natural sciences, Momentum, Nuclear physics, chemistry, Reaction model, 0103 physical sciences, Neutron, Halo, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Beam (structure)
Abstract: Neutrons arising from the breakup of a 30 MeV/nucleon C-19 beam on a tantalum target have been measured using the 98 element array DEMON. A narrow, forward peaked neutron angular distribution, with a corresponding momentum spread considerably smaller than those measured simultaneously for N-21, O-22 and F-24 was observed for charged fragments with Z < Z(proj). Interpreted in terms of the core-breakup reaction model, the results support the existence of a one neutron halo in C-19.
Published: 1996
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28. Integral measurement of the breakup excitation function using a multiple silicon telescope

Author: Z. Dlouhy, N. K. Skobelev, F. Pougheon, S. M. Lukyanov, F. Negoita, O. Sorlin, C. Borcea, J.M. Corre, A.J. Kordyasz, V. Borrel, F. Carstoiu, M. G. Saint-Laurent, M. Lewitowicz, R. Anne, A. S. Fomichev, A.C. Mueller, D. Guillemaud-Mueller, Yu.E. Penoinzhkevich, 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), 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), 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, Excitation function, Nuclear and High Energy Physics, Silicon, 010308 nuclear & particles physics, business.industry, Detector, Monte Carlo method, Experimental data, chemistry.chemical_element, Breakup, 01 natural sciences, law.invention, Telescope, Optics, chemistry, law, 0103 physical sciences, 010306 general physics, business, Instrumentation, Energy (signal processing)
Abstract: A simple method is proposed for measuring the inclusive breakup excitation function in which the experimental device, consisting of a set of successive silicon detectors, serves the double purpose of decreasing the incident beam energy and of detecting and identifying the reaction products. Monte Carlo simulations revealed the merits and the limitations of the method. Finally, experimental data for tritons are treated in order to obtain relevant physical informations.
Published: 1995

29. Projectile coulomb excitation with fast radioactive beams

Author: María José García Borge, Rainer Neugart, O. Sorlin, Thomas Nilsson, D. Bazin, R. Anne, M. G. Saint-Laurent, Göran Hugo Nyman, P. Hornshøj, D. Guillemaud-Mueller, S. Dogny, Björn Jonson, J.M. Corre, P. G. Hansen, P. Jensen, M. Lewitowicz, H. Emling, A.C. Mueller, K. Wilhelmsen-Rolander, Olof Tengblad, F. Pougheon, R. Bimbot, G. Schrieder, 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), 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), 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, Projectile, Gamma ray, Perturbation (astronomy), Coulomb excitation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 3. Good health, Nuclear physics, symbols.namesake, 0103 physical sciences, symbols, Nuclear fusion, Atomic physics, 010306 general physics, Doppler effect, Nuclear Physics
Abstract: We report a search for gamma rays emanating from Coulomb excitation of fast (30-46 MeV/u) radioactive projectiles He-8, Be-11,Be-12,Be-14 interacting with a lead target. These are clearly identified by their Doppler shift. The 320 keV 1/2(-) --> 1/2(+)gamma transition from Be-11 was observed with a cross-section of 191 +/- 26 mb which is noticeably less than expected from the known lifetime and in the perturbation limit of pure Coulomb excitation. In the other nuclei rather stringent upper limits of 0.01 to 0.2 Weisskopf units, are placed on the hypothetical transition to 1(-) states.
Published: 1995

30. Identification of mu-s-isomers produced in the fragmentation of 112Sn beam

Author: J.M. Corre, Yu. E. Penionzhkevich, J. Szerypo, C. Borcea, R. Hue, H. Keller, Oleg B. Tarasov, K.-H. Schmidt, W.-D. Schmidt-Ott, M. Pfützner, Robert Grzywacz, Michel Gaelens, M. Lewitowicz, G. Auger, F. Pougheon, J. Żylicz, V. Borrel, D. Guillemaud-Mueller, A.C. Mueller, D. Bazin, S. M. Lukyanov, Z. Janas, T. Dörfler, K. Rykaczewski, Marc Huyse, M. G. Saint-Laurent, O. Sorlin, R. Anne, J. Wauters, A. Fomichov, 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Isotope, Spectrometer, 010308 nuclear & particles physics, Projectile, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Ion, Time correlation, Fragmentation (mass spectrometry), 0103 physical sciences, Atomic physics, 010306 general physics
Abstract: Decays of over forty short-lived ( T 1 2 from ≈ 50 ns to 70 μs) isomeric states including a new isomer 66mAs produced in the fragmentation of a 112Sn beam (58 A·MeV, 63 A·MeV) on a natNi target were observed at the final focus of the LISE3 spectrometer at GANIL. Their detection, based on the slow (≈ 10 μs) time correlation of identified ions with the characteristic γ-radiation, represents a novel method to search for new isomers and can be used for unambiguous isotope identification for projectile fragment separator experiments. Isomeric yields and isomer-to-total production ratios were determined.
Published: 1995
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31. Production of isomeric $^{44}$V and $^{42}$Sc in high energy heavy ion reactions

Author: A. Knipper, F. Didierjean, F. Pougheon, A. Huck, H. Keller, M. G. Saint-Laurent, G. Walter, O. Sorlin, M. Lewitowicz, P. Baumann, A.C. Mueller, V. Borrel, D. Guillemaud-Mueller, G. Marguier, D. Bazin, R. Anne, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de 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), 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), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), 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 Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, High energy, Spectrometer, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nickel, chemistry, 0103 physical sciences, Nuclear fusion, Heavy ion, Atomic physics, 010306 general physics
Abstract: Beta-coincidentγ-rays were measured from implanted44V and42Sc nuclei. These were selected after58Ni+nickel reactions by means of the LISE3 spectrometer at GANIL. The production of the isomeric states was identified by detecting their typicalβ-delayedγ-ray cascades. From the intensities of the detectedγ-lines the ratio between isomer and ground-state production of44V follows to be 1 to 3.0(4).
Published: 1994
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32. Identification of the doubly-magic nucleus $^{100}$Sn in the reaction $^{112}$Sn+$^{nat}$Ni at 63 MeV/nucleon

Author: W.-D. Schmidt-Ott, J. Zylicz, S. M. Lukyanov, M. Pfützner, K.-H. Schmidt, M. Lewitowicz, V. Borrel, R. Hue, Z. Janas, Oleg B. Tarasov, R. Anne, O. Sorlin, J. Wauters, J. Szerypo, C. Borcea, T. Dörfler, Yu. E. Penionzhkevich, H. Keller, J.M. Corre, G. Auger, D. Guillemaud-Mueller, Robert Grzywacz, D. Bazin, F. Pougheon, M. G. Saint-Laurent, A.C. Mueller, A. Fomichov, Marc Huyse, K. Rykaczewski, 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), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, 010308 nuclear & particles physics, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 01 natural sciences, 7. Clean energy, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, medicine, MAGIC (telescope), Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Nucleus, Nuclear Physics
Abstract: We report on the production of the doubly-magic nucleus 100 Sn and other proton-rich nuclei in the A ∼ 100 region in the reaction 112 Sn + nat Ni at 63 MeV/nucleon. The experiment was carried out using the high acceptance device SISSI and the Alpha and LISE3 spectrometers at GANIL. The identification of the reaction products ( A , Z and Q ) was made using the measurements of time-of-flight, energy-loss and kinetic energy.
Published: 1994
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33. The response of BGO scintillation detectors to light charged nuclei

Author: D. Guillemaund-Mueller, L. Nosek, R. Anne, S. M. Lukyanov, V. Borrel, A. Kugler, S. Dogny, J. Svanda, A.J. Kordyasz, V. Wagner, A.C. Mueller, C. Borcea, Yu. E. Penionzhkevich, F. Pougheon, R. Bimbot, Z. Dlouhý, M. G. Saint-Laurent, M. Lewitowicz, 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), 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), 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, Linear function (calculus), Scintillation, Range (particle radiation), 010308 nuclear & particles physics, Gamma ray, 01 natural sciences, Particle detector, Ion, Nuclear physics, 0103 physical sciences, Scintillation counter, Measuring instrument, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment, 010306 general physics, Instrumentation
Abstract: Results of the comparative studies of the response of BGO crystals to gamma rays and light nuclei (He, Li, Be, B, C and N) in the energy range from 20 to 35 MeV/A are discussed. The light output isa linear function of the particle energy in all cases, the slope of the function however, is different for various ions. The general dependence of the slope parameter on the In (AZ 2 ) value of detected light ions is reported for the first time.
Published: 1992
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34. New neutron-rich isotopes in the scandium-to-nickel region, produced by fragmentation of a 500 MeV/u $^{86}$Kr beam

Author: K. Sümmerer, C. Donzaud, D. Guillemaud-Mueller, M. Pfützner, G. Münzenberg, K. P. Rykaczewski, A. Magel, C. Stephan, E. Roeckl, A. Grewe, D. J. Vieira, F. Nickel, M. Lewitowicz, A. Piechaczek, J.P. Dufour, I. Schall, Bernd Voss, H. Keller, Hans Geissel, M.S. Pravikoff, L. Tassan-Got, Max Weber, M. G. Saint-Laurent, A.C. Mueller, 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), 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 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)
Subjects: Physics, Nuclear and High Energy Physics, Isotope, Spectrometer, 010308 nuclear & particles physics, Nuclear Theory, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Nickel, chemistry, 0103 physical sciences, Nuclear fusion, Neutron, Scandium, Nuclide, Beryllium, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: We have measured production cross-sections of the new neutron-rich isotopes58Ti,61V,63Cr,66Mn,69Fe,71Co and neighbouring isotopes that have been identified as projectile fragments from reactions between a 500 MeV/u86Kr beam and a beryllium target. The isotope identification was performed with the zero-degree magnetic spectrometer FRS at GSI, using in addition time-of-flight and energy-loss measurements. The experimental production cross-sections for the new nuclides and neighbouring isotopes are compared with an empirical parametrization. The resulting prospects for reaching even more neutron-rich isotopes, such as the doubly-magic nuclide78Ni, are discussed.
Published: 1992
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35. Two-neutron removal reactions for very neutron-rich nuclei

Author: Björn Jonson, S. Mattsson, P. G. Hansen, Achim Richter, M. G. Saint-Laurent, A. Latimier, Rainer Neugart, R. Bimbot, A. Richard, K. Wilhelmsen, O. Sorlin, R. Anne, K. Riisager, M. Lewitowicz, H. Emling, G. Schrieder, D. Guillemaud-Mueller, L. Johannsen, F. Pougheon, S.E. Arnell, Gunnar Nyman, A.C. Mueller, 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), 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), 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: Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Projectile, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Neutron cross section, Neutron detection, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The two-neutron removal reactions of beams of 11 Li, 14 Be and 8 He upon Be, Ni and Au targets were studied at 30 MeV/u. The cross sections and the neutron forward angular distributions were measured; they correlate strongly with the two-neutron separation energy of the projectile. Even though the coverage of the neutron detectors was limited, a rough neutron-neutron distribution could be extracted. A simplified interpretation of the data is presented.
Published: 1992
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36. The decay modes of proton drip-line nuclei with A between 42 and 47

Author: L. Faux, D. Guillemaud-Mueller, O. Sorlin, C. Marchand, F. Pougheon, M. G. Saint-Laurent, J.P. Dufour, R. Anne, C. Détraz, V. Borrel, A.C. Mueller, M. Lewitowicz, E. Kashy, D. Bazin, L.K. Fifield, S. Dogny, A. Fleury, C. Borcea, R. Del Moral, F. Hubert, M.S. Pravikoff, G. G. Chubarian, 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), 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), 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 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), 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: Physics, implicit anthropology, Nuclear and High Energy Physics, Proton, Isotope, Spectrometer, 010308 nuclear & particles physics, Nuclear Theory, human représentation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], methods for information and communication, 7. Clean energy, 01 natural sciences, Mass formula, Nuclear physics, 0103 physical sciences, Nuclear fusion, Atomic physics, Proton emission, Nuclear Experiment, 010306 general physics, Nucleon, Multiplet, interpretation
Abstract: Neutron-deficient isotopes with Z=21 to 26 have been produced as projectile-like fragments of an intense 58Ni GANIL beam of 69 MeV/nucleon. The nuclei selected by the upgraded LISE3 spectrometer were identified and implanted in a silicon detector telescope. The 43Cr, 47Fe and 46Fe isotopes were identified for the first time whereas 45Fe, 45Mn, 44Mn and 42V were not observed, indicating probable instability of these nuclei against particle emission. Measurements of the half-lives of 43Cr and 46Mn have been performed and the analysis of their measured beta-delayed proton spectra has given, through the isobaric multiplet mass equation, an empirical estimation of their masses. Half-lives of 44Cr, 43V, 47Fe and 46Fe have also been measured. A discussion of various mass predictions for nuclei at the proton drip-line is given.
Published: 1992
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37. Search for new radioactivities at the proton drip-line

Author: F. Pougheon, D. Guillemaud-Mueller, C. Détraz, M.S. Pravikoff, V. Borrel, R. Anne, M. Lewitowicz, Dominique Bazin, F. Hubert, A. Fleury, A.C. Mueller, J.P. Dufour, 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), 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), 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 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), 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: Physics, Proton, 010308 nuclear & particles physics, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, medicine, Physics::Accelerator Physics, Proton emission, Nuclear Experiment, 010306 general physics, Nucleon, Nucleus, ComputingMilieux_MISCELLANEOUS
Abstract: A major achievement in the study of nuclei far from stability has been the observation of new radioactive modes 1. Besides broadening the scope of reported nuclear processes, new radioactive modes provide specific structure information. Among them, direct emission of more than one nucleon carries unaltered informations on nuclear correlations. The simplest case is the long-predicted and not yet observed: direct two-proton radioactivity. At the proton drip-line, it might happen that a nucleus is bound by a one-proton emission but is able to decay by the direct emission of two protons. This process, discussed long time ago by Goldanski 2 and Janecke 3 is governed by barrier penetration.
Published: 1991

38. The beta decay of $^{18}$C

Author: E. Hanelt, M.S. Pravikoff, J. Frehaut, J.P. Dufour, R. Del Moral, G. Giraudet, F. Hubert, A.C. Mueller, D. Jean, M. Beau, K. Sümmerer, B. A. Brown, A. Fleury, K.-H. Schmidt, 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), Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, 010308 nuclear & particles physics, Branching fraction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Beta decay, Nuclear physics, Internal conversion, Double beta decay, 0103 physical sciences, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Delayed neutron, Radioactive decay
Abstract: 18 C has been produced as a projectile fragment in the interaction of a 60 MeV/u 22 Ne beam with a thick beryllium + carbon target. Using the LISE spectrometer of GANIL tuned according to the PFIS method allowed an unprecedented measurement of its β-delayed γ spectroscopy, along with redetermination of half-life and β-neutron branching ratio. A partial decay scheme is proposed. A comparison with theoretical predictions provides a qualitative understanding of the decay of 18 C.
Published: 1991

39. $^{31}$Ar and $^{27}$S: beta-delayed two-proton emission and mass excess

Author: R. Del Moral, F. Hubert, D. Guillemaud-Mueller, E. Roeckl, V. Borrel, D. Bazin, M.S. Pravikoff, R. Anne, J.P. Dufour, F. Pougheon, C. Détraz, J.C. Jacmart, A.C. Mueller, 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), 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), 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 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), 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: Physics, Nuclear and High Energy Physics, Mass excess, Isotope, 010308 nuclear & particles physics, Nuclear Theory, organisation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Proton energy, 7. Clean energy, 01 natural sciences, Spectral line, Nuclear physics, patent, Fragmentation (mass spectrometry), 0103 physical sciences, Isobaric process, High Energy Physics::Experiment, Atomic physics, Proton emission, Nuclear Experiment, 010306 general physics, Decay correct
Abstract: Beta-delayed two-proton decay is reported for the T z = − 5 2 isotopes 31 Ar and 27 S wnich were produced by fragmentation of 36 Ar at 85 MeV/u. The two-proton nature of this decay is established on the basis of the number of events which trigger two detectors or more in a silicon-detector telescope. The proton energy spectra give experimental values for the daughter energy levels and for the branching ratios. The deduced values of the 31 Ar and 27 S masses are discussed and compared with mass predictions. For both nuclei, other channels like β3p and βpα are to be searched for since the observed β2p and βp branches do not fully account for the total decay width of the isobaric analog states in the daughter nuclei. Partial decay schemes are proposed for 31 Ar and 27 S.
Published: 1991
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40. Search for direct two-protons radioactivity from Ti isotopes at the proton drip line

Author: A. Fleury, Yu Hu Zhang, J.C. Jacmart, M.S. Pravikoff, J.P. Dufour, M. Lewitowicz, F. Hubert, A.C. Mueller, D. Bazin, R. Anne, D. Guillemaud-Mueller, F. Pougheon, C. Détraz, P. Bricault, A. Richard, V. Borrel, 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), 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), 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 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 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: Physics, Nuclear and High Energy Physics, Isotope, Proton, 010308 nuclear & particles physics, Nuclear Theory, Radiochemistry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Isotopes of oxygen, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, ComputingMilieux_MISCELLANEOUS, Line (formation)
Abstract: The neutron-deficient isotopes 39 Ti and 40 Ti have been produced as fragments of 58 Ni projectiles at 65 MeV per nucleon. Decay by β-delayed charged-particle emission has been observed for both of them with half-lives of 26 −7 +8 ms for 39 Ti and 56 −12 +18 ms for 40 Ti. No evidence for direct two-proton emission from 39 Ti was obtained. The conditions that would make such a new radioactive mode possible are discussed.
Published: 1990
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41. First observation of the neutron-rich nuclei42Si,45, 46P,48S, and51Cl from the interaction of 44 MeV/u48Ca +64Ni

Author: D. Bazin, S. M. Lukyanov, Yu. E. Penionzhkevich, W. D. Schmidt-Ott, M. Lewitowicz, A. Latimier, A. Richard, R. Anne, F. Pougheon, Y. Zhang, D. Guillemaud-Mueller, C. Détraz, E. Kashy, A.V. Belozyorov, A. G. Artukh, J.C. Jacmart, A.C. Mueller, P. Bricault, 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), 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), 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 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), 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), and 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)
Subjects: Physics, Nuclear and High Energy Physics, Isotope, 010308 nuclear & particles physics, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 3. Good health, Nuclear physics, 0103 physical sciences, Nuclear fusion, Neutron, 010306 general physics, Beam (structure)
Abstract: Five new very neutron-rich isotopes, 42Si,45,46p, 48 S and 51CI, are identiled from the interaction of a 44 MeV/b 48Ca beam with a 64Ni target.
Published: 1990
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42. Matter distribution in neutron-rich light nuclei and total reaction cross-section

Author: Tsan Ung Chan, J.F. Bruandet, E. Liatard, R. Bimbot, Ch. Heitz, F. Hanappe, G. Costa, D. Guillemaud-Mueller, S. Kox, Y. El Masri, F. Glasser, A.C. Mueller, 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), 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), 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), 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)-Université Grenoble Alpes (UGA)
Subjects: Physics, SIMPLE (dark matter experiment), Isotope, 010308 nuclear & particles physics, Projectile, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Nuclear physics, Cross section (physics), Distribution (mathematics), Isospin, 0103 physical sciences, Neutron, Nuclear drip line, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: Mean square radii of light radioactive projectiles, including exotic isotopes close to the neutron drip line (11Li, 14Be, and 17B), have been deduced from total reaction cross-section measurements, using a simple microscopic model. The isospin dependence of nuclear radii is discussed and compared to other experimental results.
Published: 1990

43. Measurement and QRPA calculation of the beta-delayed neutron emission of $^{21-22}$N and $^{23-24}$O

Author: A. G. Artukh, J.C. Jacmart, A.V. Belozyorov, A. Richard, D. Guillemaud-Mueller, A.C. Mueller, Yu. E. Penionzhkevich, W. D. Schmidt-Ott, D. Bazin, R. Anne, H.V. Klapdor-Kleingrothaus, M. Lewitowicz, F. Pougheon, A. Staudt, C. Détraz, S. M. Lukyanov, P. Bricault, E. Kashy, 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), 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), 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 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, Isotope, Spectrometer, 010308 nuclear & particles physics, Neutron emission, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Isotopes of nitrogen, Nuclear physics, Decay energy, 0103 physical sciences, Neutron detection, Atomic physics, Nuclear Experiment, 010306 general physics, Delayed neutron, Radioactive decay
Abstract: Neutron-rich isotopes of nitrogen and oxygen have been produced as projectile-like fragments in the reaction of a 44 MeV/u 48 Ca beam with a 173mg/cm 2 181 Ta target. The fragments have been analyzed by the doubly achromatic spectrometer LISE and implanted in a semiconductor identification telescope, surrounded by a 4π neutron detector in order to observe their radioactive decay. The β-delayed neutron emission has been measured for the isotopes 21,22 N and 23,24 O for the first time and the β-half-lives T 1 2 and delayed neutron-emission probabilities P n are determined. These values are discussed within the framework of a QRPA calculation. The influence of the decay energy Q β used in the calculation is examined, indicating the reliability of predicted matrix elements. Furthermore, P n values are calculated and compared to the experimental data.
Published: 1990
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44. Observation of forward neutrons from the break-up of the 11Li neutron halo

Author: Achim Richter, F. Pougheon, R. Bimbot, K. Riisager, Björn Jonson, M. G. Saint-Laurent, Rainer Neugart, P. G. Hansen, H. Emling, G. Schrieder, A.C. Mueller, O. Sorlin, K. Wilhelmsen, L. Johannsen, R. Anne, S. Mattsson, S.E. Arnell, M. Lewitowicz, D. Guillemaud-Mueller, Göran Hugo Nyman, 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), 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), 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, Break-Up, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Radius, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Neutron temperature, Nuclear physics, 0103 physical sciences, Neutron, Halo, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The cross-sections and forward angular distributions of fast neutrons have been studied for the reaction (11Li, 9Li) at 29 MeV/u on targets of Be, Ni and Au. The cross-sections are large and arise essentially from peripheral reactions. The angular distributions of the neutrons are very narrow and indicate the existence of a neutron halo with radius of about 12 fm.
Published: 1990
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45. Zero degree measurements of isotopic distributions in 44 MeV/u $^{86}$Kr-induced reactions for the production of nuclei far from stability

Author: M. G. Saint-Laurent, A.C. Mueller, D. Bazin, D. Guerreau, R. Anne, D. Guillemaud-Mueller, 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), and 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)
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Fusion, Spectrometer, 010308 nuclear & particles physics, Projectile, Nuclear Theory, Zero (complex analysis), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Stability (probability), Degree (temperature), 0103 physical sciences, Dissipative system, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The velocity and isotopic distributions of nuclei produced in 44 MeV/u 86Kr-induced reactions on 27Al, 103Rh and 197Au targets are investigated by means of the magnetic spectrometer LISE. These distributions are compared with two different models, and indicate that no real projectile fragmentation occurs, but rather highly dissipative processes such as incomplete fusion or deep-inelastic transfer. Consequently, the yields of nuclei far from stability is much lower relative to those observed with lighter projectiles such as 40Ar at the same energy.
Published: 1990
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46. Beta-delayed proton decay of $^{28}$S

Author: R. Del Moral, F. Hubert, E. Roeckl, V. Borrel, R. Anne, J.C. Jacmar, M.S. Pravikoff, D. Guillemaud-Mueller, G. Audi, A.C. Mueller, F. Pougheon, C. Détraz, J.P. Dufour, D. Bazin, B. A. Brown, 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), 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), 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), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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: Physics, Nuclear and High Energy Physics, Isotope, Proton, 010308 nuclear & particles physics, Proton decay, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Spectral line, Mass formula, Nuclear physics, 0103 physical sciences, Isobaric process, Atomic physics, Nuclear Experiment, 010306 general physics, Multiplet, Excitation
Abstract: Beta-delayed proton radioactivity has been observed for the 28 S isotope ( T z = −2), produced by projectile fragmentation of 85 MeV/u 36 Ar. The measured half-life of 28 S is 125 ± 10 ms. Energy spectra of beta-delayed protons have been measured. The lowest T = 2 state in the daughter nucleus 28 P has been located at an excitation energy of 5900 ± 21 keV. A comparison of the experimental data to the quadratic form of the isobaric multiplet mass equation shows that the energies of the five T = 2 states of the A = 28 quintet are well represented by that relation. Shell-model predictions for the half-life of 28 S and the location and decay properties of the lowest T = 2 state of 28 P are in good agreement with experimental data.
Published: 1989
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47. $^{35}$Na: a new neutron-rich sodium isotope

Author: M. Langevin, D. Guillemaud-Mueller, C. Thibault, F. Touchard, M. Epherre, A.C. Mueller, C. Détraz, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and 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)
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Neutron emission, Radiochemistry, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Isotopes of sodium, 01 natural sciences, Isotope separation, law.invention, law, 0103 physical sciences, Neutron, 010306 general physics
Abstract: 35 Na produced by on-line isotope separation has been identified by the detection of β-delayed neutron emission. The measured half-life is (1.5±0.5) ms.
Published: 1983

48. First observation of the exotic nucleus $^{22}$C

Author: D. Guerreau, C. Détraz, M. Bernas, Stephen D. Hoath, M. G. Saint Laurent, E. Quiniou, J.C. Jacmart, F. Pougheon, R. Anne, A.C. Mueller, Dominique Bazin, D. Guillemaud-Mueller, 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), 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), 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 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, Isotope, 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, Fragmentation (weaponry), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Nuclear drip line, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The fragmentation of 44 MeV/u 40Ar projectiles on a 166 mg/cm2 181Ta target was used to search for extremely neutron-rich nuclei at the the neutron drip line. The 22C isotope (Tz = +5) is identified for the first time and the recent observations of 19B and 23N are confirmed.
Published: 1986
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49. Observation of new neutron rich nuclei $^{29}$F, $^{35,36}$Mg, $^{38,39}$Al, $^{40,41}$Si $^{43,44}$P, $^{45,47}$S, $^{46,49}$Cl and $^{49,51}$Ar from the interactions of 55 MeV/u $^{48}$Ca + Ta

Author: V.V. Kamanin, B.A. Gvozdev, J.C. Jacmart, V. Borrel, A.C. Mueller, D. Guerreau, V.B. Kutner, A.M. Kalinin, A. G. Artukh, D. Guillemaud-Mueller, M. G. Saint-Laurent, Yu. E. Penionzhkevich, W. D. Schmidt-Ott, F. Pougheon, A. Richard, N. Hoai Chau, C. Détraz, R. Anne, D. X. Jiang, S. M. Lukyanov, M. Lewitowicz, D. Bazin, 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), 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), 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 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), 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: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Magnetic separation, Analytical chemistry, Tantalum, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Crystallography, Time of flight, chemistry, 0103 physical sciences, Nuclear fusion, Neutron, 010306 general physics, Beam (structure)
Abstract: After magnetic separation, identification through time of flight and δE×E measurements has allowed the observation of the new nuclei,29F,35,36Mg,38,39Al,40,41Si,43,44P,45,46,47S;46,47,48,49Cl;49,50,51Ar from the interaction of a48Ca beam of 55 MeV/u with tantalum targets.
Published: 1989
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50. Production of spin-aligned unstable nuclei in projectile fragmentation at intermediate energies

Author: R. Bimbot, J. Kasagi, D. Guillemaud-Mueller, W. D. Schmidt-Ott, Koichiro Asahi, T. Ichihara, D. Bazin, T. Kubo, R. Anne, Y. Gono, M. Ishihara, M. Fukuda, A.C. Mueller, Robert, Suzanne, Institut de Physique Nucléaire d'Orsay (IPNO), and 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)
Subjects: Physics, Nuclear and High Energy Physics, SIMPLE (dark matter experiment), 010308 nuclear & particles physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Momentum, Yield (chemistry), 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Spin (physics), Anisotropy, Projectile fragmentation, Beam (structure)
Abstract: Spin alignment of 14B products in projectile fragmentation reaction induced by 18O beam at E/A = 60 MeV/u has been measured through observation of anisotropy in β-delayed γ ray emission. The alignment A is small in the momentum region corresponding to the peak in the yield, whereas it takes a large negative value for the high-momentum tail. The result is discussed in terms of a simple model of projectile fragmentation. The relevance of the present result to other applications is also mentioned.
Published: 1988

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