Author: "J, Giovinazzo" - Searchworks@Jio Institute Digital Library Search Results

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51. New Isotopes and Proton Emitters–Crossing the Drip Line in the Vicinity ofSn100

Author: I. Čeliković, M. Lewitowicz, R. Gernhäuser, R. Krücken, S. Nishimura, H. Sakurai, D.S. Ahn, H. Baba, B. Blank, A. Blazhev, P. Boutachkov, F. Browne, G. de France, P. Doornenbal, T. Faestermann, Y. Fang, N. Fukuda, J. Giovinazzo, N. Goel, M. Górska, S. Ilieva, N. Inabe, T. Isobe, A. Jungclaus, D. Kameda, Y.-K. Kim, Y. K. Kwon, I. Kojouharov, T. Kubo, N. Kurz, G. Lorusso, D. Lubos, K. Moschner, D. Murai, I. Nishizuka, J. Park, Z. Patel, M. Rajabali, S. Rice, H. Schaffner, Y. Shimizu, L. Sinclair, P.-A. Söderström, K. Steiger, T. Sumikama, H. Suzuki, H. Takeda, Z. Wang, H. Watanabe, J. Wu, and Z. Xu
Subjects: Physics, Range (particle radiation), Isotope, Proton, 010308 nuclear & particles physics, Center (category theory), General Physics and Astronomy, 7. Clean energy, 01 natural sciences, 0103 physical sciences, Production (computer science), Atomic physics, 010306 general physics, Line (formation)
Abstract: Several new isotopes, ^{96}In, ^{94}Cd, ^{92}Ag, and ^{90}Pd, have been identified at the RIKEN Nishina Center. The study of proton drip-line nuclei in the vicinity of ^{100}Sn led to the discovery of new proton emitters ^{93}Ag and ^{89}Rh with half-lives in the submicrosecond range. The systematics of the half-lives of odd-Z nuclei with T_{z}=-1/2 toward ^{99}Sn shows a stabilizing effect of the Z=50 shell closure. Production cross sections for nuclei in the vicinity of ^{100}Sn measured at different energies and target thicknesses were compared to the cross sections calculated by epax taking into account contributions of secondary reactions in the primary target.
Published: 2016
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52. High-precision half-life measurements of atomic nuclei

Author: J. Giovinazzo, I. Matea, B. Blank, G. Canchel, T. Kurtukian Nieto, A. Bacquias, and J. Souin
Subjects: Nuclear physics, Physics, Coupling constant, Nuclear and High Energy Physics, Series (mathematics), Atomic nucleus, Physical and Theoretical Chemistry, Atomic physics, Weak interaction, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Standard Model
Abstract: In a series of measurements performed at the IGISOL facility at the Accelerator Laboratory of the University of Jyvaskyla, the half-lives of 26Si, 29P, 30,31S, 42Ti and 62Ga were measured with high precision. These half-lives are important ingredients for tests of the weak-interaction standard model and allow, together with other experimental inputs and theoretical correction terms, the determination of the vector coupling constant of the weak interaction. The IGISOL method used in Jyvakyla is an ideal tool for these measurements as it allows to access all elements without distinction of their chemical properties.
Published: 2012
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53. The decay of proton-rich nuclei in the mass region

Author: S. Czajkowski, A. Bey, A. J. Boston, F. Becker, M. Caamaño, F. de Oliveira Santos, Robert Grzywacz, S. Grévy, P. Mayet, Margareta Hellström, C. Dossat, F. Aksouh, Marielle Chartier, V. A. Maslov, C. Moore, M. Stanoiu, Georgi P. Georgiev, D. Cortina, A Fleury, J. Giovinazzo, M. Pfützner, J. C. Thomas, C. Mazzocchi, M. J. Lopez Jimenez, B. Blank, D. Karamanis, I. Matea, C. Borcea, Michio Honma, Z. Janas, J. Kurcewicz, M. Lewitowicz, G. Canchel, N. Adimi, I. Stefan, R. Borcea, and M.S. Pravikoff
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, Proton, 010308 nuclear & particles physics, Branching fraction, Nuclear Theory, Half-life, 01 natural sciences, 7. Clean energy, Mass formula, Nuclear physics, 0103 physical sciences, Isobaric process, Atomic physics, Proton emission, Nuclear Experiment, 010306 general physics, Multiplet
Abstract: In a series of experiments at the SISSI/LISE3 facility of GANIL conducted between 1999 and 2004, we have collected decay information for proton-rich nuclei between {sup 36}Ca and {sup 56}Zn. The data allowed us to study the decay properties of 26 nuclei. The main experimental information obtained for all nuclei is their {beta}-decay half-life and their total {beta}-delayed proton emission branching ratio. For many nuclei, individual proton groups and {gamma} rays were identified and allowed us to establish first partial decay schemes for some of the nuclei studied. In addition, mass-excess values have been determined for some of the nuclei by means of the isobaric multiplet mass equation. For {sup 50}Ni, the decay via {beta}-delayed two-proton emission could be tentatively identified. The decay of {sup 49}Ni allowed for the first time to identify the first 2{sup +} state in {sup 48}Fe. The experimental data are confronted to model predictions for the half-life and the mass-excess values.
Published: 2007
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54. High-precision half-life measurements for the superallowed Fermiβ+emitterNe18

Author: A. T. Laffoley, C. E. Svensson, C. Andreoiu, G. C. Ball, P. C. Bender, H. Bidaman, V. Bildstein, B. Blank, D. S. Cross, G. Deng, A. Diaz Varela, M. R. Dunlop, R. Dunlop, A. B. Garnsworthy, P. E. Garrett, J. Giovinazzo, G. F. Grinyer, J. Grinyer, G. Hackman, B. Hadinia, D. S. Jamieson, B. Jigmeddorj, D. Kisliuk, K. G. Leach, J. R. Leslie, A. D. MacLean, D. Miller, B. Mills, M. Moukaddam, A. J. Radich, M. M. Rajabali, E. T. Rand, J. C. Thomas, J. Turko, C. Unsworth, and P. Voss
Subjects: Nuclear and High Energy Physics
Published: 2015
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55. Super-Allowed β Decay of23Mg Studied with a High-Precision Germanium Detector

Author: M. Roche, H. Guérin, Annika Voss, T. Kurtukian Nieto, J. Giovinazzo, P. Alfaurt, Jani Hakala, C. Magron, Sami Rinta-Antila, B. Blank, Jukka Koponen, G. F. Grinyer, Ari Jokinen, Juuso Reinikainen, M. Gerbaux, H. Bouzomita, P. Delahaye, I. Matea, J. C. Thomas, Heikki Penttilä, S. Grévy, Tommi Eronen, Ilkka Pohjalainen, M. Reponen, Iain Moore, Veli Kolhinen, and Dmitry Gorelov
Subjects: Physics, nuclear mirror transitions, ta114, super-allowed decay, Analytical chemistry, quark-mixing matrix, Semiconductor detector
Published: 2015
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56. Competition of β-delayed protons and β-delayed γ rays in $^{56}$Zn and the exotic β-delayed γ-proton decay

Author: H. Fujita, S. Grévy, Takatoshi Suzuki, Atsushi Tamii, B. Bilgier, B. Rubio, J. C. Thomas, G. Susoy, Y. Fujita, C. Stodel, O. Kamalou, A. Algora, J. Giovinazzo, Jorge Agramunt, S. E. A. Orrigo, W. Gelletly, A. M. Rogers, M. Gerbaux, H. C. Kozer, B. Blank, P. Ascher, R. B. Cakirli, E. Ganioglu, Lucia Popescu, L. Kucuk, F. Molina, T. Kurtukian-Nieto, L. Caceres, Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), 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), 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), V. Greco, M. La Cognata, S. Pirrone, F. Rizzo, C. Spitaleri, 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)-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, 010308 nuclear & particles physics, Proton decay, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Gamma ray, I. Heavy and Superheavy Elements, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Beta (velocity), Nuclear Experiment, 010306 general physics
Abstract: This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.ISBN: 978-88-7438-101-2, Expérience GANIL/LISE3/EXOGAM; International audience; Remarkable results have been published recently on the β decay of 56Zn. In particular, the rare and exotic β-delayed γ-proton emission has been detected for the first time in the fp shell. Here we focus the discussion on this exotic decay mode and on the observed competition between β-delayed protons and β-delayed γ rays from the Isobaric Analogue State.
Published: 2015
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57. Half-life and branching ratios for the $\beta$ decay of $^{38}$Ca

Author: F. Munoz, I. Matea, L. Audirac, L. Caceres, B. Blank, G. Canchel, J. Giovinazzo, N. A. Smirnova, M. Gerbaux, P. Ascher, F. Didierjean, J. Souin, L. Serani, J. C. Thomas, A. Bacquias, F. de Oliveira Santos, T. Kurtukian Nieto, L. Daudin, M. Roche, S. Grévy, 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), 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 Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-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), GANILEXP, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-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, 010308 nuclear & particles physics, Branching fraction, Hadron, Half-life, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Branching (polymer chemistry), 01 natural sciences, Nuclear physics, medicine.anatomical_structure, Distribution (mathematics), 0103 physical sciences, medicine, Nuclear fusion, Nuclide, 010306 general physics, Nucleus
Abstract: In an experiment at the LISE3 facility of GANIL, we have studied with high precision the $0^{+}\rightarrow 0^{+}$ $ \beta$ decay of 38Ca. The LISE3 facility allowed to produce close to pure samples of the nuclide of interest. We measured the half-life of this nucleus to be 443.63(35)ms, whereas the super-allowed branching ratio was determined to be 77.14(35)%. Both data are in nice agreement with previous high-precision measurements and thus improve the overall precision of the experimental inputs to determine the corrected $F t$ value for this nucleus. We also compare the experimental Gamow-Teller strength distribution with theoretical shell-model predictions. Finally, future opportunities at LISE3 are discussed.
Published: 2015
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58. Competition between $β$-delayed proton and $β$-delayed $γ$ decay of the exotic $T_z$ = -2 nucleus $^{56}$Zn and fragmentation of the IAS

Author: B. Bilgier, S. E. A. Orrigo, O. Kamalou, L. Kucuk, Yoshitaka Fujita, B. Blank, P. Ascher, B. Rubio, G. Susoy, S. Grévy, Atsushi Tamii, T. Suzuki, L. Popescu, J. Giovinazzo, W. Gelletly, J. Agramunt, T. Kurtukian-Nieto, H. C. Kozer, F. Molina, M. Gerbaux, A. M. Rogers, E. Ganioglu, R. B. Cakirli, J. C. Thomas, H. Fujita, C. Stodel, L. Cáceres, A. Algora, 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), 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), GANILEXP, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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: Isospin mixing, Nuclear Theory, proton-rich nuclei, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Isospin symmetry, Nuclear physics, symbols.namesake, Fragmentation (mass spectrometry), 56Zn, 0103 physical sciences, medicine, Matrix element, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Charge-exchange reactions, Nuclear structure, delayed -proton decay, fragmentation of the IAS, medicine.anatomical_structure, symbols, Atomic physics, Gamow-Teller transitions, Hamiltonian (quantum mechanics), Nucleus, Excitation, Fermi Gamma-ray Space Telescope
Abstract: Proceedings of the 2nd Conference on Advances in Radioactive Isotope Science ARIS2014. 6 pages, 4 figures; International audience; A very exotic decay mode at the proton drip-line, $\beta$-delayed $\gamma$-proton decay, has been observed in the $\beta$ decay of the $T_z$ = -2 nucleus $^{56}$Zn. Three $\gamma$-proton sequences have been observed following the $\beta$ decay. The fragmentation of the IAS in $^{56}$Cu has also been observed for the first time. The results were reported in a recent publication. At the time of publication the authors were puzzled by the competition between proton and $\gamma$ decays from the main component of the IAS. Here we outline a possible explanation based on the nuclear structure properties of the three nuclei involved, namely $^{56}$Zn, $^{56}$Cu and $^{55}$Ni, close to the doubly magic nucleus $^{56}$Ni. From the fragmentation of the Fermi strength and the excitation energy of the two populated 0$^{+}$ states we could deduce the off-diagonal matrix element of the charge-dependent part of the Hamiltonian responsible for the mixing. These results are compared with the decay of $^{55}$Cu with one proton less than $^{56}$Zn. For completeness we summarise the results already published.
Published: 2015
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59. The β-decay of 22Al

Author: B. Blank, C. Longour, Alison Laird, J. Giovinazzo, S. Czajkowski, Ari Jokinen, K. Peräjärvi, F. de Oliveira Santos, M. Lewitowicz, Peter Dendooven, Juha Äystö, N. L. Achouri, A. Emsallem, G. Canchel, J. C. Thomas, M. Stanoiu, N. Guillet, and N. Smirnova
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, Proton, 010308 nuclear & particles physics, Branching fraction, Half-life, Alpha particle, 01 natural sciences, Beta decay, Nuclear physics, 0103 physical sciences, Atomic physics, 010306 general physics, Nucleon, Radioactive decay
Abstract: In an experiment performed at the LISE3 facility of GANIL, we studied the decay of 22Al produced by the fragmentation of a 36Ar primary beam. A β-decay half-life of T1/2 = 91.1±0.5ms was measured. The β-delayed one- and two-proton emission as well as β-α and β-delayed γ-decays were measured and allowed us to establish a partial decay scheme for this nucleus. New levels were determined in the daughter nucleus 22Mg. The comparison with model calculations strongly favours a spin-parity of Iπ = 4+ for the ground state of 22Al.
Published: 2006
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60. The two-proton radioactivity in the A ∼ 50 mass region

Author: J Giovinazzo, 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), and P. Regan, P. Stevenson
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Proton decay, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, medicine, Atomic physics, 010306 general physics, Nucleus
Abstract: International audience; After $^{45}$Fe, another precursor nucleus for two-proton radioactivity has been observed: $^{54}$Zn. It has been produced and identified in an experiment performed at the GANIL/LISE3 facility. In addition to this first observation of $^{54}$Zn and its two-proton decay, the experiment allowed for a confirmation of previous results on the two-proton decay of $^{45}$Fe and of the existence of $^{48}$Ni, and gave first indications about its decay.
Published: 2005
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61. The N = Z nucleus 76 Sr: Gamow-Teller strength and nuclear deformation

Author: V. Rauch, A. Knipper, Ph. Dessagne, A. Jokinen, J. Giovinazzo, A. Huck, Olof Tengblad, María José García Borge, Ch. Miehé, M. Ramdhane, G. Walter, C. Longour, and G. Marguier
Subjects: 59 ≤ A ≤ 89 [[PACS] Properties of specific nuclei listed by mass ranges], Physics, Nuclear and High Energy Physics, [PACS] Properties of specific nuclei listed by mass ranges: 59 ≤ A ≤ 89, [PACS] Spin, parity, and isobaric spin, Branching fraction, Hadron, [PACS] γ transitions and level energies, Order (ring theory), Deformation (meteorology), medicine.anatomical_structure, medicine, Nuclear fusion, Proton emission, Atomic physics, Ground state, Nucleus, [PACS] Relation with nuclear matrix elements and nuclear structure
Abstract: 7 pages, 4 tables, 6 figures.--PACS nrs.: 21.10.Hw; 23.20.Lv; 23.40.Hc; 27.50.+e., Challenged by recent theoretical work, a, study of the β(+)-EC decay of the N = Z even-even nucleus Sr-76 has been undertaken in order to assign the parent ground-state deformation. lit this study 13 levels with J(π) = 1(+) have been located in Rb-76. The β-delayed proton emission has been observed for the first time in an N = Z even-even nucleus. The betap branching ratio has been determined to be (3.4 ± 0.8)x10(-5). The Sr-76 half-life has been remeasured and a more precise value of 7.89 ± 0.07 s has been obtained. On the basis of the comparison of measured Gamow-Teller strength with calculated strength distributions for both oblate and prolate deformation, it is concluded that the Sr-76 has strong prolate deformation in the ground state., This work was partially supported by the Spanish Agency CICYT under contract Nos. AEN96-1679 and AEN99-1046-C02-01, and by the French and Spanish Agreement IN2P3-CICYT.
Published: 2004
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62. Two-proton decay of 45Fe: a new type of radioactivity

Author: M. Lewitowicz, B. Blank, C. Borcea, F. de Oliveira Santos, M.S. Pravikoff, V. A. Maslov, A. Fleury, M. Pfützner, J. Giovinazzo, S. Czajkowski, M. J. Lopez Jimenez, Robert Grzywacz, J. C. Thomas, Marielle Chartier, M. Stanoiu, and B. A. Brown
Subjects: Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, Detector, Coincidence, Nuclear physics, Decay energy, Beta particle, Physics::Accelerator Physics, High Energy Physics::Experiment, Proton emission, Nuclear Experiment, Nucleon, Radioactive decay
Abstract: In an experiment at the SISSI-LISE3 facility of GANIL, the decay of the proton drip-line nucleus Fe45 has been studied after projectile fragmentation of a Ni58 primary beam at 75 MeV/nucleon impinging on a natural nickel target. Fragment-implantation events have been correlated with radioactive decay events in a 16x16 pixel silicon strip detector on an event-by-event basis. The decay-energy spectrum of Fe45 implants shows a distinct peak at (1.06+/-0.04)MeV with a half-life of T1/2 = (4.7+3.4-1.4)ms. None of the events in this peak is in coincidence with beta particles which were searched for in a detector next to the implantation detector. For a longer correlation interval, daughter decays of the two-proton daughter Cr43 can be observed after Fe45 implantation. The decay energy for Fe45 agrees nicely with several theoretical predictions for two-proton emission. Barrier-penetration calculations slightly favour a di-proton emission picture over an emission of two individual protons and point thus to a He2 emission mode.
Published: 2003
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63. First observation of two-proton radioactivity from an atomic nucleus

Author: M. Pfützner, Bertram Blank, and J. Giovinazzo
Subjects: Physics, Range (particle radiation), Proton, Nuclear Theory, General Engineering, Nuclear structure, Energy Engineering and Power Technology, Nuclear physics, Nuclear fission, Excited state, Atomic nucleus, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, Spontaneous fission
Abstract: Nature uses radioactivity to gain stability for an unstable atomic nucleus. The discovery of radioactivity is considered the starting point of nuclear physics. The classical types of radioactivity, α, β, γ decay and nuclear fission, have allowed for many detailed studies of nuclear structure and have found a wide range of applications in other fields of science. According to theoretical predictions, other types of nuclear transformation should occur for very short lived atomic nuclei. In recent experiments at the GANIL and GSI laboratories, two-proton radioactivity was observed for the first time in the decay of proton-rich 45Fe. To cite this article: B. Blank et al., C. R. Physique 4 (2003).
Published: 2003
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64. Beta-decay of the N = Z nucleus 72Kr

Author: V. Rauch, A. Knipper, A. Huck, Ph. Dessagne, Olof Tengblad, J. Giovinazzo, A. Jokinen, Ch. Miehé, M. Ramdhane, María José García Borge, Inmaculada Piqueras, G. Marguier, G. Walter, and C. Longour
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Decay scheme, Branching fraction, Hadron, Quasiparticle, Atomic physics, Random phase approximation, Ground state, Wave function, Beta decay
Abstract: The beta-decay of the N = Z, even-even nucleus 72Kr has been studied at the ISOLDE PSB facility at CERN. Measurements of βγ and βγγ coincidences have enriched the decay scheme of the daughter nucleus 72Br with 27 new low spin levels. A more precise half-life of T1/2 = 17.1(2) s has been determined. Strong feeding to the 72Br ground state is established yielding an unambiguous Jπ = 1+ assignment for this state. Candidates for the 72Br g.s. wave function are discussed in the framework of a self-consistent deformed mean-field calculation with SG2 Skyrme force and pairing correlations. A search for beta-delayed particle emission was made and an upper limit of 10-6 for this decay branch obtained. The cumulated experimental level density of 1+ states has been fitted with the constant temperature formula. The comparison indicates that most likely all 1+ levels up to 1.2 MeV have been observed in this investigation. The corresponding nearest-neighbour level spacing does not follow a Poisson distribution. The Gamow-Teller strength distribution is compared, in terms of nuclear deformation, with different calculations made in the framework of the quasiparticle random phase approximation.
Published: 2003
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65. Beta-decay half-lives of new neutron-rich isotopes of Re, Os and Ir approaching the r-process path near N = 126

Author: F. Becker, Enrique Casarejos, B. Jurado, F. Farget, O. Yordanov, Karlheinz Langanke, K.-H. Schmidt, B. Blank, Daniela Henzlova, L. Audouin, J. Benlliure, J. Giovinazzo, Gabriel Martínez-Pinedo, M. Fernandez-Ordoñez, Ivan Borzov, J. Pereira, T. Kurtukian-Nieto, 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), Noyaux exotiques (NEX), 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)-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), 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), Aval du cycle et Energie Nucléaire (ACEN), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-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)-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, Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Beta decay, Nuclear physics, Fragmentation (mass spectrometry), r-process, Nuclear fusion, Neutron, Nuclide, Atomic physics
Abstract: Expérience à GSI/FRS; Heavy neutron-rich nuclei close to N = 126 were produced by fragmentation of a 1A GeV 208Pb beam at the FRS at GSI. The β-decay half-lives of 7 nuclides have been determined using a novel numerical analysis method. The half-lives of 202,199Ir, 200,199Os and 196Re are reported for the first time. The comparison of the data with model calculations provides indications on the importance of first-forbidden transitions on the β-decay of nuclei around N = 126 and Z < 82.
Published: 2014
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66. $\beta $-delayed $\gamma $-proton Decay in $^{56}$Zn: Analysis of the Charged-particle Spectrum

Author: H. C. Kozer, Lucia Popescu, Toshio Suzuki, L. Caceres, L. Kucuk, J. C. Thomas, R. B. Cakirli, P. Ascher, A. M. Rogers, Ch. Stodel, J. Agramunt, Berta Rubio, Yoshitaka Fujita, F. Molina, G. Susoy, S. E. A. Orrigo, M. Gerbaux, J. Giovinazzo, Alejandro Algora, O. Kamalou, H. Fujita, T. Kurtukian-Nieto, E. Ganioglu, B. Blank, Atsushi Tamii, B. Bilgier, S. Grévy, W. Gelletly, 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), 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), GANILEXP, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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, 010308 nuclear & particles physics, Proton decay, Spectrum (functional analysis), Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Charged particle, 23.40.–s, 23.50.+z, 21.10.–k, 27.40.+z, Nuclear physics, medicine.anatomical_structure, Beta (plasma physics), 0103 physical sciences, medicine, High Energy Physics::Experiment, Física nuclear, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nucleus
Abstract: A study of the $\beta$ decay of the proton-rich $T_{z}$ = -2 nucleus $^{56}$Zn has been reported in a recent publication. A rare and exotic decay mode, $\beta$-delayed $\gamma$-proton decay, has been observed there for the first time in the $fp$ shell. Here we expand on some of the details of the data analysis, focussing on the charged particle spectrum., Comment: Proceedings of the Zakopane Conference on Nuclear Physics 2014 "Extremes of the Nuclear Landscape". 4 pages, 4 figures
Published: 2014
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67. Multiparticle emission in the decay ofAr31

Author: Antti Saastamoinen, J. C. Thomas, M. J. G. Borge, G. T. Koldste, Ángel Perea, J. H. Kusk, B. Blank, E. Picado, José Antonio Briz, J. Giovinazzo, M. Carmona-Gallardo, Thomas Nilsson, T. Kurturkian-Nieto, J. Van de Walle, K. Riisager, L. M. Fraile, Ari Jokinen, H. O. U. Fynbo, Olof Tengblad, Björn Jonson, V. Pesudo, B. D. Grann, and J. G. Johansen
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Branching fraction, Gamma ray, 7. Clean energy, 01 natural sciences, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, medicine, Isobaric process, Beta (velocity), Atomic physics, 010306 general physics, Nucleus, Spin-½, Fermi Gamma-ray Space Telescope
Abstract: A multihit capacity setup was used to study the decay of the dripline nucleus Ar-31, produced at the ISOLDE facility at CERN. A spectroscopic analysis of the beta-delayed three-proton decay of Ar-31 is presented for the first time together with a quantitative analysis of the beta-delayed 2p gamma decay. A new method for determination of the spin of low-lying levels in the beta p daughter 30S using proton-proton angular correlations is presented and used to determine that the spin of the 5.2-MeV level is most likely 3(+) with 4(+) also possible. The half-life of Ar-31 is found to be 15.1(3) ms. An improved analysis of the Fermi beta strength including the beta 3p-decay mode gives a total measured branching ratio of 3.60(44)%, which is lower than the theoretical value found to be 4.24(43)%. Finally, a previously unidentified. transition from the isobaric analog state in the decay of Ar-33 has been found.
Published: 2014
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68. Observation of theβ-Delayedγ-Proton Decay ofZn56and its Impact on the Gamow-Teller Strength Evaluation

Author: B. Bilgier, E. Ganioǧlu, S. Grévy, J. Giovinazzo, B. Rubio, P. Ascher, A. M. Rogers, J. C. Thomas, W. Gelletly, Atsushi Tamii, Hisanori Fujita, H. C. Kozer, Lucia Popescu, Y. Fujita, L. Kucuk, F. Molina, B. Blank, M. Gerbaux, T. Kurtukian-Nieto, S. E.A. Orrigo, O. Kamalou, C. Stodel, Takashi Suzuki, Alejandro Algora, J. Agramunt, L. Caceres, G. Susoy, and R. B. Cakirli
Subjects: Nuclear physics, Physics, Proton decay, Isospin, Double beta decay, Nuclear Theory, General Physics and Astronomy, High Energy Physics::Experiment, Nuclear Experiment, Nuclear theory, Beta decay, Fermi Gamma-ray Space Telescope
Abstract: We report the observation of a very exotic decay mode at the proton drip line, the $\ensuremath{\beta}$-delayed $\ensuremath{\gamma}$-proton decay, clearly seen in the $\ensuremath{\beta}$ decay of the ${T}_{z}=\ensuremath{-}2$ nucleus $^{56}\mathrm{Zn}$. Three $\ensuremath{\gamma}$-proton sequences have been observed after the $\ensuremath{\beta}$ decay. Here this decay mode, already observed in the $sd$ shell, is seen for the first time in the $fp$ shell. Both $\ensuremath{\gamma}$ and proton decays have been taken into account in the estimation of the Fermi and Gamow-Teller strengths. Evidence for fragmentation of the Fermi strength due to strong isospin mixing is found.
Published: 2014
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69. High-Precision Half-Life Measurements for the Superallowed Fermi $\beta$+ Emitters $^{14}$O and $^{18}$Ne

Author: B. Hadinia, A. J. Radich, G. Deng, K. G. Leach, Corina Andreoiu, J. C. Thomas, A. B. Garnsworthy, D. S. Jamieson, E. R. Tardiff, D.W. Miller, H. Bouzomita, G. F. Grinyer, G. C. Ball, A. D. MacLean, Bertram Blank, Steffen Ketelhut, P. C. Bender, D. S. Cross, Rae Austin, M. Moukaddam, P. Voss, Mustafa Rajabali, H. Bidaman, E. T. Rand, J. Giovinazzo, B. Mills, M. R. Dunlop, A. T. Laffoley, A. Diaz Varela, P. Finlay, V. Bildstein, R. Dunlop, C. Unsworth, D. Kisliuk, P. E. Garrett, B. Jigmeddorj, J. Turko, J Grinyer, J. R. Leslie, C. E. Svensson, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Nuclear physics, Physics, Oxygen-14, half-life, Neon-18, Half-life, Superallowed beta decay, Beta (velocity), Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS, Fermi Gamma-ray Space Telescope
Abstract: International audience
Published: 2014
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70. Observation of the β-delayed γ-proton decay of (56)Zn and its impact on the Gamow-Teller strength evaluation

Author: S E A, Orrigo, B, Rubio, Y, Fujita, B, Blank, W, Gelletly, J, Agramunt, A, Algora, P, Ascher, B, Bilgier, L, Cáceres, R B, Cakirli, H, Fujita, E, Ganioğlu, M, Gerbaux, J, Giovinazzo, S, Grévy, O, Kamalou, H C, Kozer, L, Kucuk, T, Kurtukian-Nieto, F, Molina, L, Popescu, A M, Rogers, G, Susoy, C, Stodel, T, Suzuki, A, Tamii, and J C, Thomas
Abstract: We report the observation of a very exotic decay mode at the proton drip line, the β-delayed γ-proton decay, clearly seen in the β decay of the T_{z}=-2 nucleus ^{56}Zn. Three γ-proton sequences have been observed after the β decay. Here this decay mode, already observed in the sd shell, is seen for the first time in the fp shell. Both γ and proton decays have been taken into account in the estimation of the Fermi and Gamow-Teller strengths. Evidence for fragmentation of the Fermi strength due to strong isospin mixing is found.
Published: 2014

71. Production cross sections of heavy neutron-rich nuclei approaching the nucleosynthesis r-process path around A = 195

Author: F. Becker, J. Pereira, M. Fernandez-Ordoñez, K.-H. Schmidt, B. Blank, T. Kurtukian-Nieto, Enrique Casarejos, Daniela Henzlova, J. Giovinazzo, L. Audouin, F. Farget, O. Yordanov, J. Benlliure, B. Jurado, 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), Noyaux exotiques (NEX), 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)-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), 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), Aval du cycle et Energie Nucléaire (ACEN), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-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)-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 physics, Nuclear and High Energy Physics, 26.30.Hj, 25.70.Mn, 27.80.+w, Nucleosynthesis, Path (graph theory), r-process, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published: 2014
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72. Beta decay of the exotic Tz = - 2, $^{56}$Zn nucleus and half-life of various proton-rich Tz = -1 nuclei

Author: B. Rubio, E. Ganioglu, W. Gelletly, H. C. Kozer, Lucia Popescu, F. Molina, L. Kucuk, T. Kurtukian-Nieto, B. Blank, A. M. Rogers, J. C. Thomas, S. E.A. Orrigo, Takashi Suzuki, G. Susoy, O. Kamalou, J. Giovinazzo, M. Gerbaux, Y. Fujita, Alejandro Algora, Hisanori Fujita, Atsushi Tamii, B. Bilgier, S. Grévy, P. Ascher, C. Stodel, R. B. Cakirli, J. Agramunt, L. Caceres, Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Noyaux exotiques (NEX), 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)-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), Department of Physics, University of Surrey, University of Surrey (UNIS), 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), Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan, SKC CEN, Belgique, Physics Division, Argonne National Laboratory, Argonne National Laboratory [Lemont] (ANL), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 physics, 23.40.-s, 23.50.+z, 21.10.-k, 27.40.+z, medicine.anatomical_structure, Proton, medicine, General Physics and Astronomy, Half-life, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Beta decay, Nucleus
Abstract: Expérience GANIL/LISE3/EXOGAM; International audience; Preliminary results of an experimental study of the beta -decay of the exotic T$_z$ = - 2, $^{56}$Zn nucleus and other proton-rich T$_z$ = -1 nuclei are presented. The ions were produced at GANIL using fragmentation reactions, separated by the LISE3 spectrometer and implanted in a double-sided silicon strip detector surrounded by Ge detectors. The half-lives of $^{56}$Zn and four T$_z$ = -1 nuclei in the fp-shell have been measured. While the decay of the T$_z$ = -1 nuclei proceeds essentially by -delayed gamma emission, in the case of $^{56}$Zn -delayed proton emission is also observed. Moreover, the exotic -delayed gamma-proton decay is seen for the first time. The information from the decay study has been used to determine the absolute Fermi and Gamow-Teller transition strengths. The results for $^{56}$Zn have been compared with the mirror Charge Exchange process, the ($^3$He,t) reaction on the T$_z$ = +2, $^{56}$Fe target nucleus. This comparison is important for understanding the $^{56}$Zn decay data.
Published: 2014
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73. Sizeable beta-strength in $^{31}$Ar (β3p) decay

Author: J. A. Briz, G. T. Koldste, K. Riisager, H. O. U. Fynbo, Olof Tengblad, M. J. G. Borge, Thomas Nilsson, T. Kurturkian-Nieto, J. Giovinazzo, E. Picado, M. Carmona-Gallardo, J. Van de Walle, Antti Saastamoinen, Ari Jokinen, B. Blank, L. M. Fraile, Ángel Perea, J. C. Thomas, J. G. Johansen, Björn Jonson, V. Pesudo, Noyaux exotiques (NEX), 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)-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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 SCOAP
Subjects: Nuclear and High Energy Physics, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, 01 natural sciences, Nuclear physics, ESPECTROSCOPÍA, 0103 physical sciences, Nuclear Physics - Experiment, Beta (velocity), Nuclear Experiment (nucl-ex), 010306 general physics, FÍSICA NUCLEAR, Nuclear Experiment, Physics, ta114, Isotope, 010308 nuclear & particles physics, Isotopes of chlorine, Isotopes of argon, SPECTROSCOPIC, Beta decay, lcsh:QC1-999, DESINTEGRATION, 3. Good health, Física nuclear, High Energy Physics::Experiment, Atomic physics, EMISSION, lcsh:Physics, FÍSICA, Energy (signal processing), Excitation, Radioactive decay
Abstract: 5 pags. ; 7 figs. ; Open Access funded by SCOAP3 - Sponsoring Consortium for Open Access Publishing in Particle Physics, © 2014 The Authors. We present for the first time precise spectroscopic information on the recently discovered decay mode β-delayed 3p-emission. The detection of the 3p events gives an increased sensitivity to the high energy part of the Gamow-Teller strength distribution from the decay of 31Ar revealing that as much as 30% of the strength resides in the β3p-decay mode. A simplified description of how the main decay modes evolve as the excitation energy increases in 31Cl is provided., This work was supported by the European Union Seventh Framework through ENSAR (Contract No. 262010), it was partly supported by the Spanish Funding Agency under Projects No. FPA2012-32443, No. FPA2010-17142, CPAN ConsoliderCSD-2007-00042, and No. AIC-D-2011-0684.
Published: 2014
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74. The delayed proton emission in the –77 mass region, statistical aspects and structure effects

Author: Ph. Dessagne, J. Giovinazzo, and Ch. Miehé
Subjects: Physics, Nuclear and High Energy Physics, Series (mathematics), Proton, Nuclear Theory, Structure (category theory), Nuclear structure, Statistical model, Stability (probability), Nuclear physics, Statistical analysis, Atomic physics, Proton emission, Nuclear Experiment
Abstract: In the decay of the series of T Z =1/2 nuclei, 65 Ge, 69 Se, 73 Kr and 77 Sr, a statistical analysis was applied to the β delayed proton emission to obtain nuclear structure information. New results emerge from this study, in the light of improvements in the experimental techniques and developments of the analysis method. Experimental results are analysed by comparison with a statistical model, in order to extract information on level densities and partial transition widths of the proton emitting nuclei. Limitations of the existing descriptions of processes for nuclei far from stability are pointed out.
Published: 2000
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75. Observation of theZ=N+1NucleiY3977,Z4079r, andM4283o

Author: N. Curtis, A.T. Reed, Ph. Dessagne, Alison Bruce, J. A. Sheikh, W. Gelletly, C. Longour, B. Blank, J. Giovinazzo, D. D. Warner, M. Lewitowicz, M.S. Pravikoff, J. S. Winfield, SM Vincent, R. Wadsworth, Robert Grzywacz, Ch. Miehé, A. Fleury, C. Marchand, S. Czajkowski, C. Chandler, W. N. Catford, R. D. Page, M. G. Saint-Laurent, Z. Janas, C. J. Pearson, P. H. Regan, and N. A. Orr
Subjects: Physics, Crystallography, Proton, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Prolate spheroid, 010306 general physics, 01 natural sciences
Abstract: The very neutron deficient $Z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}N+1$ nuclei ${}_{39}^{77}\mathrm{Y}$, ${}_{40}^{79}\mathrm{Zr}$, and ${}_{42}^{83}\mathrm{Mo}$ have been observed for the first time following the fragmentation of a ${}^{92}\mathrm{Mo}$ beam. In contrast, no evidence was found for the existence of ${}_{41}^{81}\mathrm{Nb}$ and ${}_{43}^{85}\mathrm{Tc}$. The observation of ${}_{39}^{77}\mathrm{Y}$ is of particular interest in light of the instability of the odd-proton, $Z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}N+1$ systems, ${}_{35}^{69}\mathrm{Br}$, ${}_{37}^{73}\mathrm{Rb}$, ${}_{41}^{81}\mathrm{Nb}$, and ${}_{43}^{85}\mathrm{Tc}$, and may be explained as a consequence of the shape polarizing effect of the highly deformed, prolate $Z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}N\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}38$ core. The experimental results are discussed within the framework of the shell-correction model, which together with proton-decay calculations allow an estimate of the proton separation energies of these highly exotic systems to be calculated.
Published: 1999
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76. Observation of Fermi Superallowedβ+Decays in Heavy Odd-Odd,N=ZNuclei: Evidence for0+Ground States inY78,N82b, andT86c

Author: Ph. Dessagne, L. Frankland, J. Giovinazzo, Robert Grzywacz, Leif Axelsson, R. M. Clark, C. Longour, A. Fleury, B. Blank, W. Gelletly, P. H. Regan, M. Lewitowicz, C. J. Pearson, D. M. Cullen, R. Wadsworth, W. N. Catford, J. M. Daugas, K. L. Jones, O. Sorlin, D. Applebe, Ch. Miehé, B. J. Greenhalgh, J. Garcés Narro, C. Chandler, R. D. Page, Marie K. Harder, A.T. Reed, Alison Bruce, S. Czajkowski, N. S. Kelsall, and T. Kszczot
Subjects: Physics, Nuclear physics, Particle physics, General Physics and Astronomy, Beta (velocity), Fermi Gamma-ray Space Telescope
Published: 1998
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77. Low Energy Levels in Ni-72

Author: M. Sawicka, R. Grzywacz, I. Matea, H. Grawe, M. Pfützner, J. Daugas, M. Lewitowicz, D. Balabanski, F. Becker, G. Bélier, C. Bingham, C. Borcea, E. Bouchez, A. Buta, E. Dragulescu, G. de France, G. Georgiev, J. Giovinazzo, M. Górska, F. Hammache, M. Hass, M. Hellström, F. Ibrahim, Z. Janas, H. Mach, P. Mayet, V. Méot, F. Negoita, G. Neyens, F. de Oliveira Santos, R. Page, O. Perru, Z.s. Podolyák, O. Roig, K. Rykaczewski, M. Saint Laurent, J. Sauvestre, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, C.h. Theisen, D. Verney, J. Żylicz, LA COMMARA, MARCO, M., Sawicka, R., Grzywacz, I., Matea, H., Grawe, M., Pfützner, J., Dauga, M., Lewitowicz, D., Balabanski, F., Becker, G., Bélier, C., Bingham, C., Borcea, E., Bouchez, A., Buta, LA COMMARA, Marco, E., Dragulescu, G., de France, G., Georgiev, J., Giovinazzo, M., Górska, F., Hammache, M., Ha, M., Hellström, F., Ibrahim, Z., Jana, H., Mach, P., Mayet, V., Méot, F., Negoita, G., Neyen, F., de Oliveira Santo, R., Page, O., Perru, Podolyák, Z. s., O., Roig, K., Rykaczewski, M., Saint Laurent, J., Sauvestre, O., Sorlin, M., Stanoiu, I., Stefan, C., Stodel, Theisen, C. h., D., Verney, and J., Żylicz
Abstract: The yrast J(pi)=8(+) states in neutron-rich Ni-70,Ni-72,Ni-74,Ni-76 nuclei are predicted to be isomeric. The present paper describes two GANIL experiments. In the first of them a search was made for the 8(+) isomeric states in Ni-72,Ni-74 nuclei via fragmentation of Ge-76 using the ion gamma-decay correlation technique. Although these states were not observed, limits for their lifetimes were determined. In the second experiment the decay spectroscopy of Co-70,Co-72 nuclei was performed using fragmentation of a Kr-86(36+) beam and the new LISE2000 spectrometer. The beta delayed gamma rays from the decay of Co-70,Co-72 to Ni-70,Ni-72 were observed using the EXOGAM germanium detectors. The half life of Co-72 was measured to be 62(3) ms and the level sequence of the lowest excited states in Ni-72 was suggested, with the 2(+) state at 1096 keV. An attempt to reproduce the level scheme in terms of shell-model calculations was undertaken. The reasons for the disappearance of the 8(+) isomer in Ni-72 are discussed.
Published: 2003

78. High-precision half-life measurements for the superallowed Fermiβ+emitter14O

Author: J. Giovinazzo, D. S. Jamieson, A. Diaz Varela, D.W. Miller, G. Hackman, B. Blank, P. C. Bender, J Grinyer, R. Dunlop, M. R. Dunlop, A. B. Garnsworthy, H. Bidaman, A. D. MacLean, C. Unsworth, Corina Andreoiu, A. J. Radich, J. C. Thomas, P. Voss, B. Jigmeddorj, J. Turko, A. T. Laffoley, J. R. Leslie, C. E. Svensson, D. S. Cross, G. C. Ball, D. Kisliuk, G. F. Grinyer, G. Deng, Mustafa Rajabali, E. T. Rand, B. Mills, V. Bildstein, P. E. Garrett, M. Moukaddam, B. Hadinia, and K. G. Leach
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, Double beta decay, 0103 physical sciences, Half-life, Atomic physics, 010306 general physics, 01 natural sciences, Common emitter, Fermi Gamma-ray Space Telescope
Abstract: The half-life of the superallowed Fermi ${\ensuremath{\beta}}^{+}$ emitter $^{18}\mathrm{Ne}$ has been determined via two high-precision $\ensuremath{\beta}$ counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Using two different $4\ensuremath{\pi}$ continuous-flow gas-proportional counters, two independent measurements were made, yielding a weighted average of ${T}_{1/2}=1.{66400}_{\ensuremath{-}0.00048}^{+0.00057}$ s, which is consistent with but approximately 2 times more precise than a previous high-precision measurement based on $\ensuremath{\gamma}$-ray counting. The present work achieves $\ifmmode\pm\else\textpm\fi{}0.034%$ precision for the $^{18}\mathrm{Ne}$ half-life and will enable the inclusion of $^{18}\mathrm{Ne}$ among the set of precisely measured superallowed Fermi $\ensuremath{\beta}$-decay $ft$ values once improved measurements are made for its $Q$ value and superallowed branching ratio. As a test of systematic uncertainties, the half-life of $^{23}\mathrm{Ne}$ was measured and the world average has been improved, by a factor of 1.7, to $37.148\ifmmode\pm\else\textpm\fi{}0.032$ s.
Published: 2013
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79. High-Precision Half-life Measurements for the Superallowed $\beta$+ Emitter $^{14}$O

Author: Baharak Hadinia, P. E. Garrett, R. Dunlop, C. Unsworth, A. Diaz Varela, B. Blank, R. A. E. Austin, J. C. Thomas, A. B. Garnsworthy, J. Giovinazzo, G. C. Ball, G. Hackman, J. R. Leslie, D. S. Cross, Corina Andreoiu, C. E. Svensson, A. T. Laffoley, K. G. Leach, G. F. Grinyer, Steffen Ketelhut, H. Bouzomita, D. S. Jamieson, E. R. Tardiff, P. Finlay, Department of Physics [Guelph], University of Guelph, Department of Astronomy and Physics [Halifax], Saint Mary's University [Halifax], TRIUMF [Vancouver], Noyaux exotiques (NEX), 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)-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), 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), Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Isotope, Spectrometer, QC1-999, Analytical chemistry, chemistry.chemical_element, Germanium, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Semiconductor detector, chemistry, Excited state, Statistical physics, Fermi Gamma-ray Space Telescope, Common emitter
Abstract: The half-life of 14 O, a superallowed Fermi β + emitter, has been determined via simultaneous γ and β counting experiments at TRIUMF’s Isotope Separator and Accelerator facility. Following the implantation of 14 O samples at the center of the 8 π spectrometer, a γ counting measurement was performed by detecting the 2313 keV γ -rays emitted from the first excited state of the daughter 14 N using 20 high-purity germanium (HPGe) detectors. A simultaneous β counting experiment was performed using a fast plastic scintillator positioned directly behind the implantation site. The results, T ½ ( γ ) = 70:632 ± 0:094 s and T ½ ( β ) = 70:610 ± 0:030 s, are consistent with one another and, together with eight previous measurements, establish a new average for the 14 O half-life of T ½ = 70:619 ± 0:011 s with a reduced χ 2 of 0.99.
Published: 2013
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80. High-precision half-life and branching-ratio measurements for superallowed Fermi + emitters at TRIUMF - ISAC

Author: S. Triambak, A. B. Garnsworthy, Chandana Sumithrarachchi, J. Giovinazzo, Steffen Ketelhut, B. Blank, S. Chagnon-Lessard, D. Bandyopadhyay, G. Hackman, J. Wong, A. A. Phillips, A. Diaz Varela, Corina Andreoiu, E. T. Rand, I. S. Towner, D. S. Jamieson, G. C. Ball, S. J. Williams, G. F. Grinyer, G. A. Demand, M. Djongolov, C. J. Pearson, K. G. Leach, J. R. Leslie, E. F. Zganjar, D. S. Cross, C. E. Svensson, R. Dunlop, A. T. Laffoley, H. Bouzomita, C. Unsworth, K. L. Green, R. A. E. Austin, J. C. Thomas, J. Glister, A. Chester, S. W. Yates, S. Ettenauer, Baharak Hadinia, P. E. Garrett, K. Starosta, E. R. Tardiff, P. Finlay, Department of Physics [Guelph], University of Guelph, Instituut voor Kern-en Stralingsfysica (IKS), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), 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), Department of Astronomy and Physics [Halifax], Saint Mary's University [Halifax], TRIUMF [Vancouver], Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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)-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, Ion beam, Isotope, half-life, Branching fraction, QC1-999, Half-life, Superallowed Fermi β decay, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Standard Model, Nuclear physics, Isospin, Physics::Accelerator Physics, Symmetry breaking, branching ratio, Nuclear Experiment, 26Alm, Fermi Gamma-ray Space Telescope
Abstract: International audience; A program of high-precision half-life and branching-ratio measurements for superallowed Fermi emitters is being carried out at TRIUMF's Isotope Separator and Accelerator (ISAC) radioactive ion beam facility. Recent half-life measurements for the superallowed decays of 14O, 18Ne, and 26Alm, as well as branching-ratio measurements for 26Alm and 74Rb are reported. These results provide demanding tests of the Standard Model and the theoretical isospin symmetry breaking (ISB) corrections in superallowed Fermi decays.
Published: 2013
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81. Relative proton andγwidths of astrophysically important states in30S studied in theβ-delayed decay of31Ar

Author: J. G. Johansen, José Antonio Briz, Ángel Perea, G. T. Koldste, J. H. Kusk, E. Picado, J. C. Thomas, J. Van de Walle, Thomas Nilsson, T. Kurturkian-Nieto, V. Pesudo, K. Riisager, Antti Saastamoinen, J. Giovinazzo, L. M. Fraile, Björn Jonson, H. O. U. Fynbo, M. J. G. Borge, Olof Tengblad, M. Carmona-Gallardo, Ari Jokinen, and Bertram Blank
Subjects: Physics, Nuclear and High Energy Physics, Large Hadron Collider, Proton, Ion beam, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, European research, Gamma ray, 01 natural sciences, Gamma gamma, 0103 physical sciences, Beta (velocity), Atomic physics, 010306 general physics
Abstract: Resonances just above the proton threshold in S-30 affect the P-29(p, gamma)S-30 reaction under astrophysical conditions. The (p,gamma)-reaction rate is currently determined indirectly and depends on the properties of the relevant resonances. We present here a method for finding the ratio between the proton and gamma partial widths of resonances in S-30. The widths are determined from the beta 2p- and beta p gamma-decay of Ar-31, which is produced at the ISOLDE radioactive ion beam facility at the European research organization CERN. Experimental limits on the ratio between the proton and gamma partial widths for astrophysical relevant levels in S-30 have been found for the first time. A level at 4689.2(24) keV is identified in the gamma spectrum, and an upper limit on the Gamma(p)/ Gamma gamma ratio of 0.26 (95% C.L.) is found. In the two-proton spectrum two levels at 5227(3) keV and 5847(4) keV are identified. These levels were previously seen to gamma decay and upper limits on the Gamma(gamma)/Gamma(p) ratio of 0.5 and 9, respectively, (95% C.L.) are found, where the latter differs from previous calculations.
Published: 2013
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82. β Decay in the Region of Neutron-deficient $^{69,70,71}$Kr

Author: Jason A. Clark, S. Gros, G. Canchel, S. Grévy, E. A. McCutchan, C. J. Lister, J. C. Thomas, Guy Savard, A. M. Rogers, D. Seweryniak, F. de Oliveira Santos, J. Giovinazzo, B. Blank, I. Stefan, Noyaux exotiques (NEX), 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)-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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Proton, 010308 nuclear & particles physics, Krypton, chemistry.chemical_element, Half-life, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Beta decay, Nuclear physics, chemistry, Isospin, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Ground state, Spectroscopy
Abstract: Expérience GANIL/LISE3; International audience; Decay spectroscopy was performed for neutron-deficient nuclei ranging from zinc to krypton with isospin View the MathML source−32≤Tz≤0. Measurements of correlated β -delayed protons allowed us to determine the isobaric analog states fed from the decay of 65Se and 69Kr, constraining the spin of the 69Kr ground state. Preliminary results regarding the half lives for the Tz=−1Tz=−1 systems, relevant to the rapid proton capture (rp) process, are discussed.
Published: 2013
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83. Two-proton radioactivity: 10 years of experimental progresses

Author: G. Canchel, J. Pibernat, L. Perrot, C. Dossat, L. Serani, J.-L. Pedroza, S. Leblanc, C. Stodel, L. Audirac, C.-E. Demonchy, C. Borcea, B. Blank, P. Ascher, S Grvy, F. De Oliveira-Santos, J. C. Thomas, I Matea, J. Giovinazzo, Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INSTRU, 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), ELEC, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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, History, Proton, Field (physics), 010308 nuclear & particles physics, Direct observation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Tracking (particle physics), 01 natural sciences, Computer Science Applications, Education, Nuclear physics, 0103 physical sciences, Silicon detector, Physics::Accelerator Physics, 010306 general physics, Nuclear Experiment, Projectile fragmentation
Abstract: International audience; The two-proton radioactivity has been observed experimentally in 2002, at projectile fragmentation facilities, more than 40 years after the rst theoretical prediction of this process. First observations were indirect measurements, using standard silicon detector devices. Since then, a new generation of experiments allowed for a direct observation, and opened the eld of more detailed studies, using tracking devices for the detection of the emitted protons.
Published: 2013
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84. Two-proton radioactivity of45Fe

Author: B. Blank, J. Giovinazzo, and M. Pfützner
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, 0103 physical sciences, Radiochemistry, 010306 general physics, 01 natural sciences
Published: 2003
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85. Two-proton radioactivity, a new probe for structure at the proton drip-line

Author: G. Canchel, J. Pibernat, J. Giovinazzo, S. Leblanc, P. Ascher, L. Audirac, L. Serani, B. Blank, C. Borcea, F. De Oliveira-Santos, L. Perrot, J. C. Thomas, J.-L. Pedroza, C.-E. Demonchy, S. Grévy, C. Dossat, I. Matea, C. Stodel, Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INSTRU, ELEC, 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 Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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, Decay scheme, Proton, Theoretical models, Nuclear structure, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Atomic physics, Nuclear Experiment, Decay correct, Line (formation)
Abstract: International audience; The two-proton radioactivity has been evidenced experimentally in 2002 in the ground-state decay of 45Fe, while this new decay mode was predicted since the 60's. The first observations have been done indirectly, from various global quantities measured in the decay process (half-file, Q-value, daughter decay,...). Since then, new devices have been developed in order to perform energy and angular measurements of the emitted particles. The comparison of full experimental observations with theoretical models opens a new access to nuclear structure a the drip-line.
Published: 2012
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86. Direct and β-delayed multi-proton emission from atomic nuclei with a time projection chamber: the cases of $^{43}$Cr, $^{45} $Fe, and $^{51}$Ni

Author: J. Pibernat, J. Giovinazzo, I. Matea, L. Perrot, S. Grévy, J. L. Pedroza, F. de Oliveira Santos, S. Leblanc, L. Audirac, J. Huikari, B. Blank, P. Ascher, L. Serani, L. Hay, C. Borcea, C. Stodel, B. A. Brown, J. C. Thomas, G. Canchel, C. Dossat, C. E. Demonchy, Noyaux exotiques (NEX), 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)-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), RAEN, INSTRU, 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), ELEC, Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Time projection chamber, Proton, 010308 nuclear & particles physics, Hadron, Theoretical models, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Atomic nucleus, Physics::Accelerator Physics, Nuclear fusion, Atomic physics, Proton emission, Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract: Expérience GANIL/LISE3; The two-proton radioactivity of 45Fe was studied experimentally with a time projection chamber. The aim of the experiment was the reconstruction of the proton tracks in three dimensions. Energy and angular correlations have been determined and the data are compared with theoretical models, in particular with a three-body model. Moreover, the decay of 43Cr was studied and β-delayed one-, two- and threeproton emission could be established. The correlations observed for β-delayed two-proton emission favour a sequential emission. Finally, β-delayed two-proton emission was observed for the first time for 51Ni.
Published: 2012
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87. High-precision half-life measurements of atomic nuclei

Author: B. Blank, A. Bacquias, G. Canchel, J. Giovinazzo, T. Kurtukian Nieto, I. Matea, and J. Souin
Published: 2012
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88. Beta decay of exotic T[sub Z] = −1 and T[sub Z] = −2 nuclei

Author: B. Bilgier, B. Blank, B. Rubio, H. Fujita, R. B. Cakirli, Yoshitaka Fujita, A. Algora, E. Ganioglu, G. Susoy, J. C. Thomas, J. Giovinazzo, F. Molina, C. Stodel, Lucia Popescu, L. Kucuk, A. M. Rogers, Atsushi Tamii, S. Grévy, T. Kurtukian-Nieto, M. Gerbaux, S. E. A. Orrigo, O. Kamalou, P. Ascher, W. Gelletly, H. C. Kozer, L. Caceres, Jorge Agramunt, and Toshio Suzuki
Subjects: Physics, Nuclear physics, Isotope, 010308 nuclear & particles physics, 0103 physical sciences, Beta (velocity), 010306 general physics, 7. Clean energy, 01 natural sciences, Beta decay, Charge exchange
Abstract: The half-lives of the Tz = -2, 56Zn and Tz = -1, 58Zn isotopes and other nuclei were measured in a {\beta}-decay experiment at GANIL. The energy levels populated by the 56Zn {\beta} decay were determined. The 56Zn results are compared with the results of the mirror process, the charge exchange reaction 56Fe(3He,t)56Co.
Published: 2012
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89. Precision half-life determination of a mirror β transition: The decay of 31S

Author: Jani Hakala, J. Giovinazzo, L. Audirac, B. Blank, Juha Äystö, Saidur Rahaman, P. Ascher, M. Reponen, V.-V. Elomaa, Juho Rissanen, Tommi Eronen, Iain Moore, Anu Kankainen, Veli Kolhinen, A. Bacquias, Antti Saastamoinen, Pasi Karvonen, J. Souin, T. Kurtukian-Nieto, Ari Jokinen, Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Hadron, Half-life, Beta (velocity), Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, 01 natural sciences
Abstract: The half-life of the mirror $\beta$ decay of 31S has been measured at the IGISOL facility at the University of Jyvaskyla. The value obtained is $T_{1/2}(^{31}S)=(2553.4\pm 1.8)$ ms, in agreement with previous measurements, but with a precision that is better by a factor of ten than the literature value previously adopted. When the new result is combined with the QEC value measured recently at JYFLTRAP, a precision of better than $10^{-3}$ is obtained for the ft value.
Published: 2012
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90. β-decay measurements forN>40Mn nuclei and inference of collectivity for neutron-rich Fe isotopes

Author: C. R. Bingham, F. Becker, F. de Oliveira Santos, Georgi P. Georgiev, I. Matea, O. Roig, Ch. Stodel, H. Grawe, Robert Grzywacz, M. Lewitowicz, M. Sawicka, J. Giovinazzo, G. Belier, E. Bouchez, E. Dragulescu, D. Verney, F. Ibrahim, J. Libert, M. Pfützner, M. Stanoiu, K. P. Rykaczewski, P. Mayet, J. P. Delaroche, O. Perru, F. Hammache, V. Méot, A. Buta, J. E. Sauvestre, Ch. Theisen, J. Żylicz, Michel Girod, R. Borcea, O. Sorlin, I. Stefan, F. Negoita, M. G. Saint-Laurent, and J. M. Daugas
Subjects: Physics, Nuclear and High Energy Physics, Isotope, 010308 nuclear & particles physics, Neutron emission, Branching fraction, 7. Clean energy, 01 natural sciences, Nuclear physics, Neutron number, Isotopes of vanadium, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Delayed neutron, Radioactive decay
Abstract: A decay spectroscopic study of the neutron-rich isotopes has been performed using fragmentation of a 86Kr primary beam. Fragments from this reaction have been selected by the LISE2000 spectrometer at the Grand Acc el erateur National d Ions Lourds (GANIL). Half-lives of 29 isotopes, including the first ones identified for 61Ti (15 4 ms), 64V (19 8 ms), and 71Fe (28 5 ms), have been determined and compared with model predictions. 67,68Mn -delayed rays were observed for the first time. The branching for the -delayed neutron emission was measured to be greater than 10(5)% in the 67Mn decay. The 67Fe isomeric level is firmly determined at higher energy than assigned in previous works. The excitation energies of the first (2+) and (4+) states of 68Fe are suggested to lie at 522(1) and 1389(1) keV, respectively, thus bringing confirmation of assignments based on in-beam -ray spectroscopy. Beyond-mean-field calculations with the Gogny D1S force have been performed for even-mass nuclei through the Fe isotopic chain. Not only 68Fe but most of the neutron-rich Fe isotopes with neutron numbers below N = 50 are interpreted as soft rotors. The calculated mean occupancy of the neutron g9/2 and d5/2 orbitals in correlated ground statesmore » is steadily growing with increasing neutron number throughout the isotopic chain. Interpretation of 67Fe data is based upon the present calculations for the 66Fe and 68Fe even cores.« less
Published: 2011
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91. Precision half-life and Q -value measurement of the super-allowed b emitter 30S

Author: J. Giovinazzo, S. Rahaman, J. Souin, B. Blank, Antti Saastamoinen, Iain Moore, Juha Äystö, Veli Kolhinen, P. Ascher, Juho Rissanen, V.-V. Elomaa, Tommi Eronen, Pasi Karvonen, Ari Jokinen, L. Audirac, Jani Hakala, J. C. Thomas, 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), 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 Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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, Q value, Hadron, Value (computer science), Half-life, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Beta decay, Nuclear physics, 0103 physical sciences, Nuclear fusion, Relative precision, Atomic physics, 010306 general physics
Abstract: The b \beta -decay half-life and the ground-state-to-ground-state Q EC -value of 30S were measured with a relative precision of 14 and 2 parts in 104, respectively. The half-life measurement yields a value of 1175.9(17)ms which is in agreement with previous measurements but has a precision that is better by a factor of three. The new super-allowed Q EC -value 5464.32(20)keV is 20 times more precise and slightly larger than the previously adopted value. The experiment was performed at the IGISOL facility at the Accelerator Laboratory of the University of Jyväskylä., This work was supported in part by the Conseil Regional d’Aquitaine. We also acknowledge support from the Academy of Finland under the Finnish Center of Excellence Programme 2006-2011 (Project No. 213503, Nuclear and Accelerator Based Physics Programme at JYFL).
Published: 2011
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92. Two-Proton Radioactivity as a Tool for Nuclear Structure

Author: S. Leblanc, F. de Oliveira Santos, I. Matea, T. Kurtukian-Nieto, L. Perrot, B. Blank, Carole Dossat, G. Canchel, L. V. Grigorenko, P. Ascher, I. Companis, L. Serani, F. Delalee, L. Audirac, C. Borcea, C. Stodel, Praveen C. Srivastava, J. Huikari, S. Grévy, J. Pibernat, J. C. Thomas, B. A. Brown, C. E. Demonchy, N. Adimi, J. L. Pedroza, L. Hay, J. Giovinazzo, 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), MECA, Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), INSTRU, ELEC, 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), H. Otsu, T. Motobayashi, P. Roussel-Chomaz, T. Otsuka, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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: Materials science, Time projection chamber, Proton, Radiochemistry, Nuclear structure, two-proton radioactivity, time-projection chamber, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS, Exotic nuclei
Abstract: International audience
Published: 2011
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93. Gamow-Teller Transitions in Proton Rich Nuclei Deduced from the Combined Study of β-Decay and Charge-Exchange Reactions

Author: T. Adachi, R. B. Cakirli, T. Suzuki, C. Stodel, L. Cáceres, J. C. Thomas, H. C. Kozer, S. E. A. Orrigo, T. Kurtukian-Nieto, F. Molina, J. Giovinazzo, M. Gerbaux, B. Rubio, A. Algora, L. Kucuk, L. Popescu, W. Gelletly, Yoshitaka Fujita, G. Susoy, A. M. Rogers, Atsushi Tamii, B. Bilgier, H. Fujita, B. Blank, E. Ganioglu, P. Ascher, S. Grévy, J. Agramunt, O. Kamalou, Noyaux exotiques (NEX), 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)-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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université 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), H. Otsu, T. Motobayashi, P. Roussel-Chomaz, T. Otsuka, Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Proton, β decay, charge-exchange reaction, Atomic physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Gamow-Teller transition, ComputingMilieux_MISCELLANEOUS, Charge exchange
Abstract: International audience
Published: 2011
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94. β-delayed emission of protons at the proton drip-line: the cases of [sup 43]Cr and [sup 51]Ni

Author: L. Audirac, N. Adimi, P. Ascher, B. Blank, C. Borcea, G. Canchel, C. E. Demonchy, I. Companis, F. Delalee, F. de Oliveira Santos, C. Dossat, J. Giovinazzo, S. Grévy, L. Hay, J. Huikari, T. Kurtukian-Nieto, S. Leblanc, I. Matea, J.-L. Pedroza, L. Perrot, J. Pibernat, L. Serani, C. Stodel, P. Strivatava, J.-C. Thomas, Bertram Blank, 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, B. Blank, 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 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, Time projection chamber, Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, 23.40.-s, 23.50.+z, 27.40.+z, 29.40.Cs, 29.40.Gx, beta-delayed emission of protons, Ionization, Time Projection Chamber, 0202 electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, 020201 artificial intelligence & image processing, Atomic physics, Nuclear Experiment, Exotic nuclei, Line (formation)
Abstract: International audience; Studies of -delayed emission of protons for 43Cr and 51Ni were performed with a Time Projection Chamber. This detection setup allows to reconstruct in the three-dimensional space the tracks of the protons emitted. For the first time, -delayed emission of two protons is directly observed for 43Cr and 51Ni. The question about correlations between protons can be accessed. Finally, we show that 43Cr can emit up to three delayed protons.
Published: 2011
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95. Approaching r-process nuclei at N=126

Author: B. Jurado, K.-H. Schmidt, A. I. Morales, B. Blank, Enrique Casarejos, J. Giovinazzo, F. Rejmund, L Langanke, L. Audouin, F. Becker, Daniela Henzlova, O. Yordanov, J. Pereira, Ivan Borzov, J. Benlliure, H. Alvarez-Pol, P. Napolitani, B. Fernández, D. Cortina-Gil, T. Kurtukian-Nieto, Gabriel Martínez-Pinedo, 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), Noyaux exotiques (NEX), 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)-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), 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), Aval du cycle et Energie Nucléaire (ACEN), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-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)-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, History, 010308 nuclear & particles physics, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Computer Science Applications, Education, Nuclear physics, 0103 physical sciences, 25.75.-q, 27.90.+b, 95.30.Cq, 25.70.Mn, 27.60.+j, r-process, Nuclide, Atomic physics, 010306 general physics, Nuclear Experiment
Abstract: International audience; The production of heavy neutron-rich nuclei approaching the r-process waiting point at N$\approx$126 has been investigated in fragmentation reactions of relativistic 238U and 208Pb projectiles. Using this technique we were able to identify 73 new heavy neutron-rich nuclei expanding considerably the north-west frontier of the chart of nuclide. Moreover, we were able to determine the half lives of 13 of those nuclides. The measured values are significantly shorter than the predictions used for r-process model calculations. These shorter half lives are understood as due to the role of first-forbidden transitions in the decays of these nuclei. The confirmation of these results for r-process nuclei at N$\approx$126 would indicate that the r-process at this point is faster than expected, leading to a larger production of the heaviest nuclei.
Published: 2011
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96. The Spectroscopic study of [sup 33]Ar

Author: N. Adimi, R. Dominguez-Reyes, M. Alcorta, A. Bey, B. Blank, M. J. G. Borge, F. de Oliveira Santos, C. Dossat, H. O. U. Fynbo, J. Giovinazzo, H. H. Knudsen, M. Madurga, I. Matea, A. Perea, K. Sümmerer, O. Tengblad, J. C. Thomas, Paraskevi Demetriou, Rauno Julin, and Sotirios Harissopulos
Subjects: Physics, Decay scheme, Proton, Nuclear Theory, Nuclear structure, 020206 networking & telecommunications, 02 engineering and technology, 7. Clean energy, Beta decay, Spectral line, Nuclear physics, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Gamma spectroscopy, Atomic physics, Nuclear Experiment, Nucleon, Radioactive decay
Abstract: The proton‐rich nucleus 33Ar has been produced at the low‐energy facility SPIRAL at GANIL. Spectroscopic studies of gamma and p emission of this nucleus were performed with the “Silicon Cube” detection system. The analysis of proton and gamma singles and coincidence spectra allowed us to establish a complete decay scheme of this nucleus. The comparison of the Gamow‐Teller strength distribution deduced from our experiment and the theoretical one obtained with the Shell Model permitted the determination of a quenching factor for the Gamow‐Teller strength.
Published: 2011
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97. Direct observation of two protons in the decay of $^{54}$Zn

Author: F. Delalee, N. Adimi, J. L. Pedroza, L. V. Grigorenko, B. A. Brown, P. Ascher, F. de Oliveira Santos, B. Blank, L. Serani, C. Borcea, J. Pibernat, S. Leblanc, J. C. Thomas, S. Grévy, J. Giovinazzo, C. E. Demonchy, T. Kurtukian-Nieto, Praveen C. Srivastava, L. Perrot, I. Companis, L. Audirac, 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), 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 Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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, 23.50.+z, 27.40.+z, 29.40.Cs, 29.40.Gx, 010308 nuclear & particles physics, Branching fraction, Hadron, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Baryon, Decay energy, 0103 physical sciences, Atomic physics, 010306 general physics, Ground state, Nucleon, Nuclear Experiment, Energy (signal processing), Radioactive decay
Abstract: Accepted for publication in Physical Review Letters, Expérience au GANIL E457b (juillet 2008), LISE3 Commune au CENBG avec ACEN, MECA, INSTRU et ELEC; The two protons emitted in the decay of 54Zn have been individually observed for the rst time in a Time Projection Chamber. The total decay energy and the half-life measured in this work agree with the results obtained in a previous experiment. Angular and energy correlations between the two protons are determined and compared to theoretical distributions of a three-body model. Within the shell model framework, the relative decay probabilities show a strong contribution of the p2 con guration for the two-proton emission. After 45Fe, the present result on 54Zn constitutes only the second case of a direct observation of the ground state two-proton decay of a long-lived isotope.
Published: 2011
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98. Progress in nuclei approaching the r-process waiting point at A=195

Author: J. Benlliure, F. Becker, Daniela Henzlova, Enrique Casarejos, M. Fernandez-Ordoñez, B. Blank, O. Yordanov, F. Rejmund, J. Giovinazzo, D. Cortina-Gil, L. Audouin, T. Kurtukian-Nieto, B. Jurado, K. Schmitt, and J. Pereira
Subjects: Nuclear physics, Physics, Astrophysics and Astronomy, r-process, Point (geometry)
Published: 2010
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99. Experimental studies of an exotic decay mode at the proton drip‐line: the two‐proton radioactivity

Author: L. Audirac, N. Adimi, P. Ascher, B. Blank, B. A. Brown, C. Borcea, G. Canchel, I. Companis, F. Delalee, C. E. Demonchy, F. de Oliveira Santos, C. Dossat, J. Giovinazzo, S. Grévy, L. V. Grigorenko, L. Hay, J. Huikari, T. Kurtukian-Nieto, S. Leblanc, I. Matea, J.-L. Pedroza, L. Perrot, J. Pibernat, L. Serani, C. Stodel, P. Strivastava, J.-C. Thomas, Paraskevi Demetriou, Rauno Julin, Sotirios Harissopulos, 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), 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 Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), P. Demetriou, R. Julin, S. Harissopulos, 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 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, Time projection chamber, Isotope, Proton, Nuclear Theory, Hadron, 020206 networking & telecommunications, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, Beta decay, Particle detector, Nuclear physics, 0202 electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, 020201 artificial intelligence & image processing, Atomic physics, Nuclear Experiment, Nucleon, Radioactive decay
Abstract: Two‐proton radioactivity is an exotic decay mode for very proton‐rich nuclei. It was observed experimentally for the first time in 2002 for the nucleus 45Fe but the two protons could not be directly detected. So a new detector has been developed, a Time Projection Chamber, to individually observe the two protons emitted. It was used successfully during two experiments for the study of 45Fe and 54Zn. Energy correlations have been studied and the relative angle between the two protons is calculated.
Published: 2010
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100. Fundus autofluorescence and optical coherence tomographic findings in acute zonal occult outer retinopathy

Author: Yutaka Imamura, Richard F. Spaide, Takamitsu Fujiwara, and Vincent J Giovinazzo
Subjects: Adult, Male, medicine.medical_specialty, Pathology, genetic structures, Visual Acuity, Spectral domain, Retina, Optical coherence tomography, Retinal Diseases, Ophthalmology, medicine, Electroretinography, Humans, Fluorescein Angiography, Scotoma, Acute zonal occult outer retinopathy, Aged, Retrospective Studies, medicine.diagnostic_test, business.industry, General Medicine, Coherence (statistics), Middle Aged, Fluorescein angiography, eye diseases, Fundus autofluorescence, Acute Disease, Female, sense organs, Tomography, Visual Fields, business, Tomography, Optical Coherence
Abstract: The purpose of this study was to investigate the fundus autofluorescence and optical coherence tomography findings in eyes with acute zonal occult outer retinopathy (AZOOR).A retrospective observational case series of the fundus autofluorescence and spectral domain optical coherence tomography in a series of patients with AZOOR.There were 19 eyes of 11 patients (10 women), who had a mean age of 49.1 +/- 13.9 years. Fundus autofluorescence abnormalities were seen in 17 of the 19 eyes, were more common in the peripapillary area, and were smaller in extent than the optical coherence tomography abnormalities. Nine eyes showed progression of hypoautofluorescence area during the mean follow-up of 69.7 months. The mean thickness of the photoreceptor layer at fovea was 177 microm in eyes with AZOOR, which was significantly thinner than controls (193 microm, P = 0.049). Abnormal retinal laminations were found in 12 eyes and were located over areas of loss of the photoreceptors. The subfoveal choroidal thickness was 243 microm, which is normal.Fundus autofluorescence abnormalities in AZOOR showed distinct patterns of retinal pigment epithelial involvement, which may be progressive. Thinning of photoreceptor cell layer with loss of the outer segments and abnormal inner retinal lamination in the context of a normal choroid are commonly found in AZOOR.
Published: 2010

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