Author: "Montagnoli G." / Topic: nuclear theory - Searchworks@Jio Institute Digital Library Search Results

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46 results on '"Montagnoli G."'

1. Revised analysis of $^{40}$Ca+$^{96}$Zr fusion reactions

Author: Esbensen, H., Montagnoli, G., and Stefanini, A. M.
Subjects: Nuclear Theory
Abstract: Fusion data for $^{40}$Ca+$^{96}$Zr are analyzed by coupled-channels calculations that are based on a standard Woods-Saxon potential and include couplings to multiphonon excitations and transfer channels. The couplings to multiphonon excitations are the same as used in a previous work. The transfer couplings are calibrated to reproduce the measured neutron transfer data. This type of calculation gives a poor fit to the fusion data. However, by multiplying the transfer couplings with a $\sqrt{2}$ one obtains an excellent fit. The scaling of the transfer strengths is supposed to simulate the combined effect of neutron and proton transfer, and the calculated one- and two-nucleon transfer cross sections are indeed in reasonable agreement with the measured cross sections., Comment: 20 pages, 7 figures
Published: 2016
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2. Oscillations above the barrier in the fusion of 28Si + 28Si

Author: Montagnoli, G., Stefanini, A. M., Esbensen, H., Corradi, L., Courtin, S., Fioretto, E., Grebosz, J., Haas, F., Jia, H. M., Jiang, C. L., Mazzocco, M., Michelagnoli, C., Mijatovic, T., Montanari, D., Parascandolo, C., Scarlassara, F., Strano, E., Szilner, S., and Torresi, D.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: Fusion cross sections of 28Si + 28Si have been measured in a range above the barrier with a very small energy step (DeltaElab = 0.5 MeV). Regular oscillations have been observed, best evidenced in the first derivative of the energy-weighted excitation function. For the first time, quite different behaviors (the appearance of oscillations and the trend of sub-barrier cross sections) have been reproduced within the same theoretical frame, i.e., the coupled-channel model using the shallow M3Y+repulsion potential. The calculations suggest that channel couplings play an important role in the appearance of the oscillations, and that the simple relation between a peak in the derivative of the energy-weighted cross section and the height of a centrifugal barrier is lost, and so is the interpretation of the second derivative of the excitation function as a barrier distribution for this system, at energies above the Coulomb barrier., Comment: submitted to Physics Letters B
Published: 2015
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3. Nucleon-Nucleon Pairing Correlations probed in the 118Sn+206Pb Transfer Reactions

Author: Diklić, Josipa, Szilner, Suzana, Corradi, L., Čolovic, Petra, Colucci, G., Fioretto, E., Galtarossa, F., Goasduff, A., Gottardo, A., Grebosz, J., Illana Sisón, A., Jaworski, G., Jurado Gomez, M., Marchi, T., Mijatović, Tea, Montagnoli, G., Nurkić, Deni, Pollarolo, G., Scarlassara, F., Siciliano, M., Soić, Neven, Stefanini, A.M., Testov, D., Utepov, A., Valiente-Dobón, J.J., and Vukman, Nikola
Subjects: Physics, nuclear reaction, nucleon correlations, Nuclear Theory, Nuclear Experiment, transfer reaction
Abstract: Two nucleon transfer reactions at low bombarding energies are an ideal tool to investigate nucleon-nucleon correlations. With heavy ions one has the possibility to transfer several nucleon pairs, involving both neutrons and protons at the same time. In this work we will study how pair correlations can be probed in heavy ion collisions , and how the strong Coulomb field influences the reaction dynamic.
Published: 2021

4. Transition probabilities in neutron-rich $^{80,82}$Se and the role of the $νg_{9/2}$ orbital

Author: Litzinger, J., Blazhev, A., Dewald, A., Didierjean, F., Duchêne, G., Fransen, C., Lozeva, R., Verney, D., De Angelis, G., Bazzacco, D., Birkenbach, B., Bottoni, S., Bracco, A., Braunroth, T., Cederwall, B., Corradi, L., Crespi, F.C.L., Désesquelles, P., Eberth, J., Ellinger, E., Farnea, E., Fioretto, E., Gernhäuser, R., Goasduff, A., Görgen, A., Gottardo, A., Grebosz, J., Hackstein, M., Hess, H., Ibrahim, F., Jolie, J., Jungclaus, A., Kolos, K., Korten, W., Leoni, S., Lunardi, S., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Million, B., Möller, O., Modamio, V., Montagnoli, G., Montanari, D., Morales, A.I., Napoli, D.R., Niikura, M., Pietralla, N., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Sahin, E., Salsac, M.D., Scarlassara, F., Söderström, P.A., Stefanini, A.M., Stezowski, O., Szilner, S., Theisen, Ch., Valiente-Dobón, J.J., Vandone, V., Vogt, A., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre 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 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)
Subjects: Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: International audience; Transition probabilities of intermediate-spin yrast and non-yrast excitations in Se80,82 were investigated in a recoil distance Doppler-shift (RDDS) experiment performed at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. The Cologne Plunger device for deep inelastic scattering was used for the RDDS technique and was combined with the AGATA Demonstrator array for the γ-ray detection and coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In Se80, the level lifetimes of the yrast (61+) and (81+) states and of a non-yrast band feeding the yrast 41+ state are determined. A spin and parity assignment of the head of this sideband is discussed based on the experimental results and supported by large-scale shell-model calculations. In Se82, the level lifetimes of the yrast 61+ state and the yrare 42+ state and lifetime limits of the yrast (101+) state and of the 51− state are determined. Although the experimental results contain large uncertainties, they are interpreted with care in terms of large-scale shell-model calculations using the effective interactions JUN45 and jj44b. The excited states' wave functions are investigated and discussed with respect to the role of the neutron g9/2 orbital.
Published: 2018

5. High-spin structures in ¹³²\mathrmXe and ¹³³\mathrmXe and evidence for isomers along the ℕ=79 isotones

Author: Vogt, A., Siciliano, M., Birkenbach, B., Reiter, P., Hadyńska-Klęk, K., Wheldon, C., Valiente-Dobón, J.J., Teruya, E, Yoshinaga, N., Arnswald, K., Bazzacco, D., Blazhev, A., Bracco, A., Bruyneel, B, Chakrawarthy, R.S., Chapman, R., Cline, D., Corradi, L., Crespi, F.C.L., Cromaz, M., de Angelis, G., Eberth, J., Fallon, P., Farnea, E., Fioretto, E., Hess, H., Hetzenegger, R., Hirsch, R., Hua, H., John, P.R., Jolie, J., Jungclaus, A., Karayonchev, V., Kaya, L., Korten, W., Lee, I.Y., Leoni, S., Liang, X., Lunardi, S., Macchiavelli, A.O., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Müller-Gatermann, C., Napoli, D., Pearson, C.J., Podolyak, Zsolt, Pollarolo, G., Pullia, A., Queiser, M., Recchia, F., Regan, P.H., Régis, J.-M., Saed-Samii, N., Sahin, E., Scarlassara, F., Seidlitz, M., Siebeck, B., Sletten, G., Smith, J.F., Söderström, P.-A., Stefanini, A.M., Stezowski, O., Szilner, S., Szpak, B., Teng, R., Ur, C., Warner, D.D., Wolf, K., Wu, C.Y., and Zell, K.O.
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: The 50 � N,Z � 82 region of the Segrè chart, spanning the nuclei “northwest” of doubly-magic 132Sn, is an intriguing study ground to test the suitability and predictive power of nuclear models at both low and high spins. Low-spin excited states in the nearly spherical nuclei near proton- and neutronshell closures are well described as anharmonic vibrations [1] with a gradual change to rotational structures further away from the closed shells. Further on, quasiparticle excitations play a key role and are responsible for the presence of yrast-trap isomers. These long-lived states interrupt and fragment the decay flux in spectroscopic investigations. High-j couplings involving the unique-parity h11/2 neutron-hole orbital give rise to a wealth of high-spin states with multi-quasiparticle character. In particular, detailed knowledge of isomers is crucial to ascertain the active quasiparticle configurations in the specific nucleus.
Published: 2017

6. In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N = 126 shell gap

Author: John, PR, Valiente-Dob on, JJ, Mengoni, D, Modamio, V, Lunardi, S, Bazzacco, D, Gadea, A, Wheldon, C, Rodr guez, TR, Alexander, T, de Angelis, G, Ashwood, N, Barr, M, Benzoni, G, Birkenbach, B, Bizzeti, PG, Bizzeti-Sona, AM, Bottoni, S, Bowry, M, Bracco, A, Browne, F, Bunce, M, Camera, F, Corradi, L, Crespi, FCL, Melon, B, Farnea, E, Fioretto, E, Gottardo, A, Grente, L, Hess, H, Kokalova, T, Mijatovi c, T, Montagnoli, G, Montanari, D, Napoli, DR, Podolyak, Zsolt, Pollarolo, G, Recchia, F, Reiter, P, Roberts, OJ, Sahin, E, Salsac, M-D, Scarlassara, F, Sferrazza, M, Soderstrom, P-A, Stefanini, AM, Szilner, S, Ur, CA, Vogt, A, and Walshe, A
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
Abstract: The neutron-rich nucleus \nucleus{200}{Pt} is investigated via in-beam \gamma-ray spectroscopy in order to study the shape evolution in the neutron-rich platinum isotopes towards the N = 126 shell closure. The two-neutron transfer reaction \nucleus{198}{Pt}(\nucleus{82}{Se}, \nucleus{80}{Se})\nucleus{200}{Pt} is used to populate excited states of \nucleus{200}{Pt}. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects \gamma rays coincident with the \nucleus{80}{Se} recoils, the binary partner of \nucleus{200}{Pt}. The binary partner method is applied to extract the \gamma-ray transitions and build the level scheme of \nucleus{200}{Pt}. The level at 1884\,keV reported by Yates et. al [Phys. Rev. C 37, 1889] was confirmed to be at 1882.1\,keV and assigned as the (6^+_1) state. An additional \gamma ray was found and it presumably de-excites the (8^+_1) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even \nucleus{190-204}{Pt} isotopes, revealing that \nucleus{200}{Pt} marks the transition from the \gamma-unstable behaviour of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.
Published: 2017

7. Structure of the N=50 As, Ge, Ga nuclei

Author: Sahin, Eda, de Angelis, G., Duchene, G., Faul, T., Gadea, A., Lisetskiy, A. F., Ackermann, D., Algora, A., Aydin, S., Azaiez, F., Bazzacco, D., Benzoni, G., Bostan, M., Byrski, T., Čeliković, Igor T., Chapman, R., Corradi, L., Courtin, S., Curien, D., Pramanik, U. Datta, Didierjean, F., Dorvaux, O., Erduran, M. N., Erturk, S., Farnea, E., Fioretto, E., de France, Gilles, Franchoo, S., Gall, B., Gottardo, Andrea, Guiot, B., Haas, F., Ibrahim, F., Ince, E., Khouaja, A., Kusoglu, A., La Rana, G., Labiche, M., Lebhertz, D., Lenzi, S., Leoni, S., Lunardi, S., Mason, P., Mengoni, D., Michelagnoli, Caterina, Modamio, V., Montagnoli, G., Montanari, D., Moro, R., Mouginot, B., Napoli, Daniel R., O'Donnell, D., Oliveira, J. R. B., Ollier, J., Orlandi, R., Pollarolo, G., Recchia, Francesco, Robin, J., Salsac, Marie Delphine, Scarlassara, F., Singh, R. P., Silvestri, R., Smith, J. F., Stefan, I., Stefanini, A. M., Subotić, Krunoslav M., Szilner, S., Tonev, D., Torres, D. A., Trotta, M., Ujić, Predrag, Ur, C., Valiente-Dobon, Jose Javier, Verney, D., Yalcinkaya, M., Wady, P. T., Wiedemann, K. T., Zuber, K., La Rana, Giovanni -- 0000-0003-2814-4113, Algora, Alejandro -- 0000-0002-5199-1794, O'Donnell, David -- 0000-0002-4710-3803, Ince, Elif -- 0000-0003-4821-5441, Napoli, Daniel Ricardo -- 0000-0002-8154-6958, Montanari, Daniele -- 0000-0002-1980-7686, Tonev, Dimitar -- 0000-0003-4431-6157, Gadea, Andres -- 0000-0002-4233-1970, Ujic, Predrag -- 0000-0002-2577-5633, Oliveira, Jose Roberto -- 0000-0003-1362-7382, Datta, Ushasi -- 0000-0001-8192-1407, benzoni, giovanna -- 0000-0002-7938-0338, Scarlassara, Fernando -- 0000-0002-4663-8216, GOTTARDO, Andrea -- 0000-0002-0390-5767, Recchia, Francesco -- 0000-0002-8428-0112, Ackermann, Dieter -- 0000-0001-6284-1516, de France, Gilles -- 0000-0002-7439-1759, Celikovic, Igor -- 0000-0002-5642-4393, Montagnoli, Giovanna -- 0000-0002-8944-1456, Sahin, Eda -- 0000-0003-0683-5140, Verney, David -- 0000-0001-7924-2851, MOUGINOT, Baptiste -- 0000-0003-0957-6666, and [Sahin, E. -- de Angelis, G. -- Gadea, A. -- Corradi, L. -- Fioretto, E. -- Gottardo, A. -- Guiot, B. -- Modamio, V. -- Napoli, D. R. -- Silvestri, R. -- Stefanini, A. M. -- Valiente-Dobon, J. J.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy -- [Sahin, E.] Univ Oslo, Dept Phys, NO-0316 Oslo, Norway -- [Duchene, G. -- Faul, T. -- Byrski, T. -- Courtin, S. -- Curien, D. -- Dorvaux, O. -- Gall, B. -- Haas, F. -- Khouaja, A. -- Lebhertz, D. -- Robin, J.] CNRS, IN2P3, IPHC, Strasbourg, France -- [Duchene, G. -- Faul, T. -- Byrski, T. -- Courtin, S. -- Curien, D. -- Dorvaux, O. -- Gall, B. -- Haas, F. -- Khouaja, A. -- Lebhertz, D.] Univ Strasbourg, Strasbourg, France -- [Gadea, A. -- Algora, A.] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain -- [Lisetskiy, A. F.] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA -- [Ackermann, D.] Helmholtzzentrum Schwerionenforsch GSI, Darmstadt, Germany -- [Algora, A.] Inst Nucl Res, H-4001 Debrecen, Hungary -- [Aydin, S.] Univ Aksaray, Dept Phys, Aksaray, Turkey -- [Aydin, S. -- Bazzacco, D. -- Farnea, E. -- Gottardo, A. -- Lenzi, S. -- Lunardi, S. -- Mason, P. -- Mengoni, D. -- Michelagnoli, C. -- Montagnoli, G. -- Montanari, D. -- Recchia, F. -- Scarlassara, F. -- Ur, C.] Univ Padua, Dipartimento Fis, Padua, Italy -- [Aydin, S. -- Bazzacco, D. -- Farnea, E. -- Gottardo, A. -- Lenzi, S. -- Lunardi, S. -- Mason, P. -- Mengoni, D. -- Michelagnoli, C. -- Montagnoli, G. -- Montanari, D. -- Recchia, F. -- Scarlassara, F. -- Ur, C.] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy -- [Azaiez, F. -- Franchoo, S. -- Ibrahim, F. -- Mouginot, B. -- Stefan, I. -- Verney, D.] Univ Paris 11, Orsay, France -- [Azaiez, F. -- Franchoo, S. -- Ibrahim, F. -- Mouginot, B. -- Stefan, I. -- Verney, D.] CNRS, IPNO, IN2P3, F-91405 Orsay, France -- [Benzoni, G. -- Leoni, S.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy -- [Benzoni, G. -- Leoni, S.] Univ Milan, Dipartimento Fis, Milan, Italy -- [Bostan, M. -- Kusoglu, A. -- Yalcinkaya, M.] Istanbul Univ, Dept Phys, Istanbul, Turkey -- [Celikovic, I. -- Subotic, K. -- Ujic, P.] Vinca Inst Nucl Sci, Belgrade, Serbia -- [Chapman, R. -- Mengoni, D. -- O'Donnell, D. -- Ollier, J. -- Orlandi, R. -- Smith, J. F. -- Torres, D. A. -- Wady, P. T.] Univ W Scotland, Paisley, Renfrew, Scotland -- [Pramanik, U. Datta] Saha Inst Nucl Phys, Kolkata, India -- [Didierjean, F.] Inst Pluridisciplinaire Hubert Curien, Strasbourg, France -- [Erduran, M. N.] Istanbul Sabahattin Zaim Univ, Istanbul, Turkey -- [Erturk, S.] Nigde Univ, Dept Phys, Nigde, Turkey -- [de France, G.] GANIL, F-14021 Caen, France -- [Ince, E.] Istanbul Univ, Hasan Ali Yucel Educ Fac, Istanbul, Turkey -- [La Rana, G. -- Moro, R. -- Trotta, M.] Univ Naples Federico II, Dipartimento Sci Fis, Naples, Italy -- [La Rana, G. -- Moro, R. -- Trotta, M.] Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy -- [Labiche, M.] SERC, Daresbury Lab, STFc, Warrington WA4 4AD, Cheshire, England -- [Oliveira, J. R. B. -- Wiedemann, K. T.] Univ Sao Paulo, Sao Paulo, Brazil -- [Pollarolo, G.] Univ Turin, Dipartimento Fis Teor, Turin, Italy -- [Salsac, M. -D.] CEA Saclay, IRFU SPhN, Gif Sur Yvette, France -- [Singh, R. P.] Interuniv Accelerator Ctr, New Delhi 67, India -- [Szilner, S.] Rudjer Boskovic Inst, HR-10001 Zagreb, Croatia -- [Tonev, D.] BAS, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria -- [Zuber, K.] Inst Nucl Phys, Krakow, Poland
Subjects: gamma gamma-coin, J, pi calculated levels, Nuclear Theory, NUCLEAR REACTIONS U-238(Se-82, Ga-81), (Se-82, Ge-82), (Se-82, As-83), E=515 MeV, (fragment)gamma-coin, Ge Compton-suppressed detectors of CLARA array, thin and thick target, gamma after deexcitation using Ge Compton-suppressed detectors of CLARA array, NUCLEAR REACTIONS U-238(Se-82, Ga-81), (Se-82, Ge-82), (Se-82, As-83), deduced sigma(theta), levels, J, pi, J, pi using shell model, reaction fragments, gamma after deexcitation, levels, measured E-gamma, I gamma (theta), gamma gamma-coin, reaction fragments, measured E gamma, E=515 MeV, calculated levels, J, pi using shell model, (fragment)gamma-coin using PRISMA magnetic spectrometer, PRISMA magnetic spectrometer, deduced sigma(theta), I-gamma (theta)
Abstract: WOS: 000310091000001, The level structures of the N = 50 As-83, Ge-82, and Ga-81 isotones have been investigated by means of multi-nucleon transfer reactions. A first experiment was performed with the CLARA PRISMA setup to identify these nuclei. A second experiment was carried out with the GASP array in order to deduce the gamma-ray coincidence information. The results obtained on the high-spin states of such nuclei are used to test the stability of the N = 50 shell closure in the region of Ni-78 (Z = 28). The comparison of the experimental level schemes with the shell-model calculations yields an N = 50 energy gap value of 4.7(3) MeV at Z = 28. This value, in a good agreement with the prediction of the finite-range liquid-drop model as well as with the recent large-scale shell model calculations, does not support a weakening of the N = 50 shell gap down to Z = 28. (c) 2012 Elsevier B.V. All rights reserved., NSF [PHY0244389, PHY0555396]; European Commission within the Sixth Framework Programme through I3-EURONS [RII3-CT-2004-506065]; DGF (Germany) [DE 1516/-1]; Science and Technology Facilities Council [ST/G000689/1 NuSTAR, ST/F004052/1, ST/G000689/1, ST/J000108/1], We thank O. Sorlin for the useful discussions and the accelerator crews of LNL for the excellent support. A.F.L. acknowledges partial support of this work from NSF grants PHY0244389 and PHY0555396. This work has been partially supported by the European Commission within the Sixth Framework Programme through I3-EURONS (contract No. RII3-CT-2004-506065) and the DGF (Germany under contract No. DE 1516/-1).
Published: 2012

8. Multinucleon transfer reactions in the $^{40}$Ar + $^{208}$Pb system

Author: Mijatović, T., Szilner, S., Corradi, L., Montanari, D., Pollarolo, G., Fioretto, E., Gadea, A., Goasduff, A., Malenica, D. Jelavić, Mărginean, N., Milin, M., Montagnoli, G., Scarlassara, F., Soić, N., Stefanini, A.M., Ur, C.A., Valiente-Dobón, J.J., Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: PRIRODNE ZNANOSTI. Fizika, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], neutron-rich nuclei, multinucleon transfer reactions, magnetic spectrometer, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, NATURAL SCIENCES. Physics
Abstract: International audience; We measured multinucleon transfer reactions in the $^{40}$Ar + $^{208}$Pb system at an energy close to the Coulomb barrier, by employing the PRISMA magnetic spectrometer. We extracted differential and total cross sections of the different transfer channels, with a careful investigation of the total kinetic energy loss distributions. Comparisons between different systems having the same Pb208 target and with projectiles going from neutron-poor to neutron-rich nuclei, i.e., $^{40}$Ca, $^{58}$Ni, and $^{40}$Ar, as well as between the data and GRAZING calculations have been carried out. The neutron-rich (stable) $^{40}$Ar beam allowed us to get access to the channels involving proton pickup, whose behavior in connection with the production of neutron-rich heavy partner has been outlined.
Published: 2016

9. Light and heavy transfer products in Xe136+U238 multinucleon transfer reactions

Author: Vogt, A., Birkenbach, B., Reiter, P., Corradi, L., Mijatovic, T., Montanari, D., Szilner, S., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Crespi, F. C. L., Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Geibel, K., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Wolfram KORTEN, Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Montagnoli, G., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Recchia, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P. A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szpak, B., Theisen, Ch, Ur, C., Valiente-Dobon, J. J., Vandone, V., Wiens, A., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon
Subjects: [PHYS]Physics [physics], COLLISIONS, CM-248, NUCLEI, Nuclear Theory, U-238, GAMMA-RAY TRACKING, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], MAGNETIC SPECTROMETER PRISMA, Physical Sciences, ACTINIDE PRODUCTION, Fysik, SCATTERING, AGATA, Nuclear Experiment, DETECTOR
Abstract: International audience; Background: Multinucleon transfer reactions (MNT) are a competitive tool to populate exotic neutron-rich nuclei in a wide region of nuclei, where other production methods have severe limitations or cannot be used at all.Purpose: Experimental information on the yields of MNT reactions in comparison with theoretical calculations are necessary to make predictions for the production of neutron-rich heavy nuclei. It is crucial to determine the fraction of MNT reaction products which are surviving neutron emission or fission at the high excitation energy after the nucleon exchange.Method: Multinucleon transfer reactions in Xe-136 + U-238 have been measured in a high-resolution gamma-ray/particle coincidence experiment. The large solid-angle magnetic spectrometer PRISMA coupled to the high-resolution Advanced Gamma Tracking Array (AGATA) has been employed. Beamlike reaction products after multinucleon transfer in the Xe region were identified and selected with the PRISMA spectrometer. Coincident particles were tagged by multichannel plate detectors placed at the grazing angle of the targetlike recoils inside the scattering chamber.Results: Mass yields have been extracted and compared with calculations based on the GRAZING model for MNT reactions. Kinematic coincidences between the binary reaction products, i.e., beamlike and targetlike nuclei, were exploited to obtain population yields for nuclei in the actinide region and compared to x-ray yields measured by AGATA.Conclusions: No sizable yield of actinide nuclei beyond Z = 93 is found to perform nuclear structure investigations. In-beam gamma-ray spectroscopy is feasible for few-neutron transfer channels in U and the -2p channel populating Th isotopes.
Published: 2015

10. Light and heavy transfer products inXe136+U238multinucleon transfer reactions

Author: Vogt, A., Birkenbach, B., Reiter, P., Corradi, L., Mijatović, Tea, Montanari, D., Szilner, Suzana, Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Crespi, F. C. L., de Angelis, G., Désesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Geibel, K., Gengelbach, A., Giaz, A., Görgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Montagnoli, G., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Recchia, F., Rosso, D., Şahin, E., Salsac, M. D., Scarlassara, F., Söderström, P.-A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szpak, B., Theisen, Ch., Ur, C., Valiente-Dobón, J. J., Vandone, V., and Wiens, A.
Subjects: NATURAL SCIENCES, Nuclear Theory, Nuclear Experiment, Nuclear Physics
Abstract: Background: Multinucleon transfer reactions (MNT) are a competitive tool to populate exotic neutron-rich nuclei in a wide region of nuclei, where other production methods have severe limitations or cannot be used at all. Purpose: Experimental information on the yields of MNT reactions in comparison with theoretical calculations are necessary to make predictions for the production of neutron-rich heavy nuclei. It is crucial to determine the fraction of MNT reaction products which are surviving neutron emission or fission at the high excitation energy after the nucleon exchange. Method: Multinucleon transfer reactions in 136Xe+238U have been measured in a high-resolution γ-ray/particle coincidence experiment. The large solid-angle magnetic spectrometer PRISMA coupled to the high-resolution Advanced Gamma Tracking Array (AGATA) has been employed. Beamlike reaction products after multinucleon transfer in the Xe region were identified and selected with the PRISMA spectrometer. Coincident particles were tagged by multichannel plate detectors placed at the grazing angle of the targetlike recoils inside the scattering chamber. Results: Mass yields have been extracted and compared with calculations based on the grazing model for MNT reactions. Kinematic coincidences between the binary reaction products, i.e., beamlike and targetlike nuclei, were exploited to obtain population yields for nuclei in the actinide region and compared to x-ray yields measured by AGATA. Conclusions: No sizable yield of actinide nuclei beyond Z=93 is found to perform nuclear structure investigations. In-beam γ-ray spectroscopy is feasible for few-neutron transfer channels in U and the −2p channel populating Th isotopes. Background: Multinucleon transfer reactions (MNT) are a competitive tool to populate exotic neutron-rich nuclei in a wide region of nuclei, where other production methods have severe limitations or cannot be used at all. Purpose: Experimental information on the yields of MNT reactions in comparison with theoretical calculations are necessary to make predictions for the production of neutron-rich heavy nuclei. It is crucial to determine the fraction of MNT reaction products which are surviving neutron emission or fission at the high excitation energy after the nucleon exchange. Method: Multinucleon transfer reactions in 136Xe+238U have been measured in a high-resolution γ-ray/particle coincidence experiment. The large solid-angle magnetic spectrometer PRISMA coupled to the high-resolution Advanced Gamma Tracking Array (AGATA) has been employed. Beamlike reaction products after multinucleon transfer in the Xe region were identified and selected with the PRISMA spectrometer. Coincident particles were tagged by multichannel plate detectors placed at the grazing angle of the targetlike recoils inside the scattering chamber. Results: Mass yields have been extracted and compared with calculations based on the grazing model for MNT reactions. Kinematic coincidences between the binary reaction products, i.e., beamlike and targetlike nuclei, were exploited to obtain population yields for nuclei in the actinide region and compared to x-ray yields measured by AGATA. Conclusions: No sizable yield of actinide nuclei beyond Z=93 is found to perform nuclear structure investigations. In-beam γ-ray spectroscopy is feasible for few-neutron transfer channels in U and the −2p channel populating Th isotopes.
Published: 2015

11. Shell evolution beyond N = 40: $^{69,71,73}$Cu

Author: Sahin, E., Doncel, M., Sieja, K., de Angelis, G., Gadea, A., Quintana, B., Gorgen, A., Modamio, V., Mengoni, D., Valiente-Dobon, J.J., John, P.R., Albers, M., Bazzacco, D., Benzoni, G., Birkenbach, B., Cederwall, B., Clement, E., Curien, D., Corradi, L., Desesquelles, P., Dewald, A., Didierjean, F., Duchene, G., Eberth, J., Erduran, M.N., Farnea, E., Fioretto, E., de France, G., Fransen, C., Gernhauser, R., Gottardo, A., Hackstein, M., Hagen, T., Hernandez-Prieto, A., Hess, H., Huyuk, T., Jungclaus, A., Klupp, S., Korten, W., Kusoglu, A., Lenzi, S. M., Ljungvall, J., Louchart, C., Lunardi, S., Menegazzo, R., Michelagnoli, C., Mijatović, Tea, Million, B., Molini, P., Montagnoli, G., Montanari, D., Moller, O., Napoli, D. R., Obertelli, A., Orlandi, R., Pollarolo, G., Pullia, A., Recchia, F., Reiter, P., Rosso, D., Rother, W., Salsac, M.-D., Scarlassara, F., Schlarb, M., Siem, S., Singh, Pushpendra P., Soderstrom, P.-A., Stefanini, A.M., Stezowski, O., Sulignano, B., Szilner, Suzana, Theisen, Ch., Ur, C.A., Yalcinkaya, M., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-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, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université 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), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 21.10.Tg, 21.60.Cs, 23.20.Lv, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], multinucleon transfer reactions, AGATA Demonstrator, recoil-distance Doppler-shift method, Nuclear Experiment
Abstract: International audience; The level structure of the neutron-rich 69Cu, 71Cu, and 73Cu isotopes has been investigated by means ofmultinucleon transfer reactions. The experiment was performed at Laboratori Nazionali di Legnaro using theAGATA Demonstrator array coupled to the PRISMA magnetic spectrometer. Lifetimes of excited states inCu nuclei were measured with the recoil-distance Doppler-shift method. The resulting electromagnetic matrixelements for transitions from excited states in 69,71,73Cu nuclei are used to assess the collective or single-particlecharacter of these states. The results are compared with predictions of large-scale shell-model calculations, givingfurther insight into the evolution of the proton pf shell as neutrons fill the 1g9/2 orbital.
Published: 2015

12. Spectroscopy of the neutron-rich actinide nucleus 240U following multinucleon-transfer reactions

Author: Birkenbach, B., Vogt, A., Geibel, K., Recchia, F., Reiter, P., Valiente-Dobón, J.J., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F.C.L., de Angelis, G., Désesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Gengelbach, A., Giaz, A., Görgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P.R., Jolie, J., Judson, D.S., Jungclaus, A., Korten, W., Lenzi, S., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, Tea, Montagnoli, G., Montanari, D., Napoli, D., Pellegri, L., Pullia, A., Quintana, B., Radeck, F., Rosso, D., Sahin, E., Salsac, D.-M., Scarlassara, F., Söderström, P.-A., Stefanini, A.M., Steinbach, T., Stezowski, O., Szilner, Suzana, Szpak, B., Theisen, Ch., Ur, C., Vandone, V., and Wiens, A.
Subjects: Nuclear Theory, gamma-spectroscopy, the neutron-rich actinide region, AGATA and CLARA spectrometers, PRISMA spectrometer, Nuclear Experiment
Abstract: Background: Spectroscopic information in the neutron-rich actinide region are important to test theory in order to make predictions for the heaviest nuclei. Purpose: Gamma-ray spectroscopy of neutron-rich heavy nuclei in the actinide region. Method: Multinucleon-transfer reactions in 70Zn+238U and in 136Xe+238U have been measured in two epxeriments performed at INFN Legnaro, Italy. In the 70Zn experiment the high resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the 136Xe experiment the high-resolution Advanced Gamma Tracking Array (AGATA) was used in combination with PRISMA and the DANTE MCP detectors. Results: The ground-state band of 240U was measured up to the 24+ level. Results from a gamma-gamma coincidence and from particle coincidence are shown. Moments of inertia show clear upbend. Intriguing evidence for an extended first negative-parity band of 240U is found. Conclusions: Detailed comparison with latest calculations show best agreement with cranked relativistic Hartree-Bogoliubov (CRHB) for the g. s. band properties. The negative-parity band shows the characteristics of a band based on an octupole vibration.
Published: 2015

13. Light and heavy transfer products in 136Xe+238U multinucleon transfer reactions

Author: Vogt, A.: Birkenbach, B., Reiter, P., Corradi, L., Mijatovic, Tea, Montanari, D., Szilner, Suzana, Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Geibel, K., Gengelbach, A., Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D.S., Jungclaus, A., Korten, W., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Montagnoli, G., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Recchia, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P.-A., Stefanini, A. M., Steinbach, T., Stezowski, O., Szpak, B., Theisen, Ch., Ur, C., Valiente-Dobon, J. J., Vandone, V., and Wiens, A.
Subjects: Nuclear Theory, Heavy ion transfer reactions, gamma transitions, magnetic spectrometer, Nuclear Experiment
Abstract: Background: Multinucleon transfer reactions (MNT) are a competitive tool to populate exotic neutron-rich nuclei in a wide region of nuclei, where other production methods have severe limitations or cannot be used at all. Purpose: Experimental information on the yields of MNT reactions in comparison with theoretical calculations are necessary to make predictions for the production of neutron-rich heavy nuclei. It is crucial to determine the fraction of MNT reaction products which are surviving neutron emission or fission at the high excitation energy after the nucleon exchange. Method: Multinucleon transfer reactions in Xe136+U238 have been measured in a high-resolution γ-ray/particle coincidence experiment. The large solid-angle magnetic spectrometer PRISMA coupled to the high-resolution Advanced Gamma Tracking Array (AGATA) has been employed. Beamlike reaction products after multinucleon transfer in the Xe region were identified and selected with the PRISMA spectrometer. Coincident particles were tagged by multichannel plate detectors placed at the grazing angle of the targetlike recoils inside the scattering chamber. Results: Mass yields have been extracted and compared with calculations based on the grazing model for MNT reactions. Kinematic coincidences between the binary reaction products, i.e., beamlike and targetlike nuclei, were exploited to obtain population yields for nuclei in the actinide region and compared to x-ray yields measured by AGATA. Conclusions: No sizable yield of actinide nuclei beyond Z=93 is found to perform nuclear structure investigations. In-beam γ-ray spectroscopy is feasible for few-neutron transfer channels in U and the −2p channel populating Th isotopes.
Published: 2015

14. Spectroscopy of the neutron-rich actinide nucleus U-240 following multinucleon-transfer reactions

Author: Birkenbach, B., Vogt, A., Geibel, K., Recchia, F., Reiter, P., Valiente-Dobon, J. J., Bazzacco, D., Bowry, M., Bracco, A., Bruyneel, B., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gadea, A., Gengelbach, Aila, Giaz, A., Gorgen, A., Gottardo, A., Grebosz, J., Hess, H., John, P. R., Jolie, J., Judson, D. S., Jungclaus, A., Korten, W., Lenzi, S., Leoni, S., Lunardi, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Mijatovic, T., Montagnoli, G., Montanari, D., Napoli, D., Pellegri, L., Pollarolo, G., Pullia, A., Quintana, B., Radeck, F., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Soderstrom, P. -A, Stefanini, A. M., Steinbach, T., Stezowski, O., Szilner, S., Szpak, B., Theisen, Ch, Ur, C., Vandone, V., Wiens, A., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM SNO), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Univ. Paris-Sud, 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 de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], PARITY, DEFORMATION, Nuclear Theory, Physical Sciences, OCTUPOLE CORRELATIONS, ISOTOPES, Fysik, BANDS, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, SPINS
Abstract: International audience; Background: Nuclear structure information for the neutron-rich actinide nuclei is important since it is the benchmark for theoretical models that provide predictions for the heaviest nuclei.Purpose: gamma-ray spectroscopy of neutron-rich heavy nuclei in the actinide region.Method: Multinucleon-transfer reactions in Zn-70 + U-238 and Xe-136 + U-238 have been measured in two experiments performed at the INFN Legnaro, Italy. In the Zn-70 experiment the high-resolution HPGe Clover Array (CLARA) coupled to the magnetic spectrometer PRISMA was employed. In the Xe-136 experiment the high-resolution Advanced Gamma Tracking Array (AGATA) was used in combination with PRISMA and the Detector Array for Multinucleon Transfer Ejectiles (DANTE).Results: The ground-state band (g.s. band) of U-240 was measured up to the 20(+) level and a tentative assignment was made up to the (24(+)) level. Results from gamma gamma coincidence and from particle coincidence analyses are shown. Moments of inertia (MoI) show a clear upbend. Evidence for an extended first negative-parity band of U-240 is found.Conclusions: A detailed comparison with latest calculations shows best agreement with cranked relativistic Hartree-Bogoliubov (CRHB) calculations for the g.s. band properties. The negative-parity band shows the characteristics of a K-pi = 0 band based on an octupole vibration.
Published: 2015

15. Neutron Pair Transfer in Ni-60+116-Sn Far below the Coulomb Barrier

Author: Corradi, L., Szilner, S., Pollarolo, S., Fioretto, E., Montagnoli, G., Scarlassara, F., Stefanini, AM., Courtin, S., Goasduff, A., Haas, F., Malenica, DJ., Michelagnoli, C., Mijatovic, T., Soic, N., Ur, CA., Pajtler, MV., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Department of Mechanical and Aerospace Engineering [Princeton] (MAE), and Princeton University
Subjects: Nuclear Theory, nuclei, collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Heavy-ion reactions
Abstract: International audience; An excitation function of one-and two-neutron transfer channels for the Ni-60 + 116-Sn system has been measured with the magnetic spectrometer PRISMA in a wide energy range, from the Coulomb barrier to far below it. The experimental transfer probabilities are well reproduced, for the first time with heavy ions, in absolute values and in slope by microscopic calculations which incorporate nucleon-nucleon pairing correlations.
Published: 2014

16. Shape evolution in the neutron-rich osmium isotopes: Prompt gamma-ray spectroscopy of Os196

Author: John, P. R., Modamio, V., Valiente-Dobon, J. J., Mengoni, D., Lunardi, S., Rodriguez, T. R., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Cederwall, B., Corradi, L., Crespi, F. C. L., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Goergen, A., Gottardo, A., Grebosz, J., Grente, L., Hess, H., Jungclaus, A., Kokalova, Tz, Korichi, A., Wolfram KORTEN, Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Maron, G., Meczynski, W., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., Napoli, D. R., Nolan, P., Oziol, Ch, Podolyak, Zs, Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Roberts, O. J., Rosso, D., Sahin, E., Salsac, M. D., Scarlassara, F., Sferrazza, M., Simpson, J., Soderstrom, P. A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch, Ur, C. A., and Walshe, J.
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states
Published: 2014

17. Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os196

Author: R. John, P., Modamio, V., Valiente-Dobón, J.J., Mengoni, D., Lunardi, S., R. Rodríguez, T., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., De Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., G. Bizzeti, P., M. Bizzeti-Sona, A., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Cederwall, B., Corradi, L., C. L. Crespi, F., Désesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Görgen, A., Gottardo, A., Grebosz, J., Grente, L., Hess, H., Jungclaus, A., Kokalova, Tz., Korichi, A., Korten, W., Kuşoğlu, A., Lenzi, S., Leoni, S., Ljungvall, J., Maron, G., Meczynski, W., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatović, T., Million, B., Molini, P., Montagnoli, G., Montanari, D., R. Napoli, D., Nolan, P., Oziol, Ch., Podolyák, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., J. Roberts, O., Rosso, D., Şahin, E., Salsac, M.-D., Scarlassara, F., Sferrazza, M., Simpson, J., Söderström, P.-A., M. Stefanini, A., Stezowski, O., Szilner, S., Theisen, Ch., Ur, C.A., Walshe, J., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188−198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.
Published: 2014

18. Barrier distributions and signatures of transfer channels in the Ca40+Ni58,64 fusion reactions at energies around and below the Coulomb barrier

Author: Bourgin, D., Courtin, S., Haas, F., Stefanini, A. M., Montagnoli, G., Goasduff, A., Montanari, D., Corradi, L., Fioretto, E., Huiming, J., Scarlassara, F., Rowley, N., Szilner, S., Mijatović, T., Département Recherches Subatomiques (DRS-IPHC), 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 National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut d'Etudes Avancées de l'Université de Strasbourg, and Institut de Physique Nucléaire d'Orsay (IPNO)
Subjects: [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Theory
Abstract: International audience; Background: The nuclear structure of colliding nuclei is known to influence the fusion process. Couplings of the relative motion to nuclear shape deformations and vibrations lead to an enhancement of the sub-barrier fusion cross section in comparison with the predictions of one-dimensional barrier penetration models. This enhancement is explained by coupled-channels calculations including these couplings. The sub-barrier fusion cross section is also affected by nucleon transfer channels between the colliding nuclei.Purpose: The aim of the present experiment is to investigate the influence of the projectile and target nuclear structures on the fusion cross sections in the Ca40+Ni58 and Ca40+Ni64 systems.Methods: The experimental and theoretical fusion excitation functions as well as the barrier distributions were compared for these two systems. Coupled-channels calculations were performed using the ccfull code.Results: Good agreement was found between the measured and calculated fusion cross sections for the Ca40+Ni58 system. The situation is different for the Ca40+Ni64 system where the coupled-channels calculations with no nucleon transfer clearly underestimate the fusion cross sections below the Coulomb barrier. The fusion excitation function was, however, well reproduced at low and high energies by including the coupling to the neutron pair-transfer channel in the calculations.Conclusions: The nuclear structure of the colliding nuclei influences the fusion cross sections below the Coulomb barrier for both Ca40+Ni58,64 systems. Moreover, we highlighted the effect of the neutron pair-transfer channel on the fusion cross sections in Ca40+Ni64.
Published: 2014

19. Neutron pair transfer in 60Ni+116Sn far below the Coulomb barrier

Author: Montanari, D., Corradi, L., Szilner, Suzana, Pollarolo, G., Fioretto, E., Montagnoli, G., Scarlassara, F., Stefanini, A.M., Courtin, S., Goasduff, A., Haas, F., Jelavić Malenica, Deša, Michelagnoli, C., Mijatovic, Tea, Soić, Neven, Ur, C. A., and Varga Pajtler, Maja
Subjects: Nuclear Theory, nucleon-nucleon correlations, excitation function, subbarrier energies, Nuclear Experiment
Abstract: An excitation function of one- and two-neutron transfer channels for the 60Ni+116Sn system has been measured with the magnetic spectrometer PRISMA in a wide energy range, from the Coulomb barrier to far below it. The experimental transfer probabilities are well reproduced, for the first time with heavy ions, in absolute values and in slope by microscopic calculations which incorporate nucleon-nucleon pairing correlations.
Published: 2014

20. Shape evolution in the neutron-rich Osmium isotopes: prompt gamma-ray spectroscopy of 196Os

Author: John, P.R., Modamio, V., Valiente-Dobon, J.J., Mengoni, D., Lunardi, S., Rodriguez, T.R., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., de Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P.G., Bizzeti-Sona, A.M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Camera, F., Cederwall, B., Corradi, L., Crespi, F.C.L., Desesquelles, P., Eberth, J., Farnea, E., Fioretto, E., Gorgen, A., Gottardo, A., Grebosz, J., Grente, L., Hess, H., Jungclaus, A., Kokalova, Tz., Korichi, A., Korten, W., Kusoglu, A., Lenzi, S., Leoni, S., Ljungvall, J., Maron, G., Meczynski, W., Menegazzo, R., Michelagnoli, C., Mijatovic, Tea, Million, B., Molini, P., Montagnoli, G., Montanari, D., Napoli, D.R., Nolan, P., Oziol, Ch., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Roberts, O.J., Rosso, D., Sahin, E., Salsac, M.-D., Scarlassara, F., Sferrazza, M., Simpson, J., Soderstrom, P.-A., Stefanini, A.M., Stezowski, O., Szilner, Suzana, Theisen, Ch., Ur, C.A., and Walshe, J.
Subjects: Nuclear Theory, shape transition, neutron rich nuclei, gamma-ray spectroscopy, Nuclear Experiment
Abstract: The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron rich 196Os nucleus through in-beam gamma-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA and the coincident gamma rays were measured with the AGATA demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even 188, 198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behaviour towards predominately vibrational nuclei through triaxial configurations. An almost perfect gamma-unstable/triaxial rotor yrast-band is predicted for 196Os which is in agreement with the experimentally measured excited states.
Published: 2014

21. Collective nature of low-lying excitations in ^{70,72,74}Zn from lifetime measurements using the AGATA spectrometer demonstrator

Author: Louchart, C., Obertelli, A., Görgen, A., Korten, W., Bazzacco, D., Birkenbach, B., Bruyneel, B., Clément, E., Coleman Smith, P. J., Corradi, L., Curien, D., de Angelis, G., de France, G., Delaroche, J. P., Dewald, A., Didierjean, F., Doncel, M., Duchêne, G., Eberth, J., Erduran, M. N., Farnea, E., Finck, C., Fioretto, E., Fransen, C., Gadea, A., Girod, M., Gottardo, A., Grebosz, J., Habermann, T., Hackstein, M., Huyuk, T., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Klupp, S., Krücken, R., Kusoglu, A., Lenzi, S. M., Libert, J., Ljungvall, J., Lunardi, S., Maron, G., Menegazzo, R., Mengoni, D., Michelagnoli, C., Million, B., Molini, P., Möller, O., Montagnoli, G., Montanari, D., Napoli, D. R., Orlandi, R., Pollarolo, Giovanni, Prieto, A., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Rother, W., Sahin, E., Salsac, M. D., Scarlassara, F., Schlarb, M., Siem, S., Singh, P. P., Söderström, P. A., Stefanini, A. M., Stézowski, O., Sulignano, B., Szilner, S., Theisen, C. h., C. A., Ur, Valiente Dobón, J. J., Zielinska, M., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM ELEC, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre 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), CSNSM SNO, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AGATA, 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), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 23.20.−g, 27.50.+e, 29.30.Kv, 29.40.Gx, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, spectrometers, AGATA, PRISMA, spectroscopic information on Zn isotopes
Abstract: Neutron-rich nuclei with protons in the fp shell show an onset of collectivity around N=40. Spectroscopic information is required to understand the underlying mechanism and to determine the relevant terms of the nucleon-nucleon interaction that are responsible for the evolution of the shell structure in this mass region.
Published: 2013

22. Spectroscopy of odd-mass cobalt isotopes toward the N=40 subshell closure and shell-model description of spherical and deformed states

Author: Recchia, F., Lenzi, S. M., Lunardi, S., Farnea, E., Gadea, A., Mǎrginean, N., Napoli, D. R., Nowacki, Frédéric, Poves, Alfredo, Valiente-Dobón, J. J., Axiotis, M., Aydin, S., Bazzacco, D., Benzoni, G., Bizzeti, P. G., Bizzeti-Sona, A. M., Bracco, A., Bucurescu, D., Caurier, E., Corradi, L., De Angelis, G., Della Vedova, F., Fioretto, E., Gottardo, A., Ionescu-Bujor, M., Iordachescu, A., Leoni, S., Mǎrginean, R., Mason, P., Menegazzo, R., Mengoni, D., Million, B., Montagnoli, G., Orlandi, R., Pollarolo, G., Sahin, E., Scarlassara, F., Singh, R. P., Stefanini, A. M., Szilner, S., Ur, C. A., Wieland, O., and UAM. Departamento de Física Teórica
Subjects: neutron-rich Cobalt isotopes, Nuclear Theory, Física, Nuclear Experiment
Abstract: The neutron-rich cobalt isotopes up to A = 67 have been studied through multinucleon transfer reactions by bombarding a 238U target with a 460-MeV 70Zn beam. Unambiguous identification of prompt γ rays belonging to each nucleus has been achieved using coincidence relationships with the ions detected in a high-acceptance magnetic spectrometer. The new data are discussed in terms of the systematics of the cobalt isotopes and interpreted with large-scale shell-model calculations in the fpgd model space. In particular, very different shapes can be described in 67Co, at the edge of the island of inversion at N = 40, where a low-lying highly deformed band coexists with a spherical structure, This work was partially supported by the European Community FP6, Structuring the ERA Integrated Infrastructure Initiative Contract No. EURONS RII3-CT-2004-506065, by MICINN, Spain (Contract No. FPA2011-29854), by IN2P3, France (Contract No. AIC-D-2011-648), by Comunidad de Madrid, Spain (Contract No. HEPHACOS S2009-ESP-1473), and by Generalitat Valenciana, Spain (Contract No. PROMETEO/ 2010/101). A. Gadea and E. Farnea acknowledge the support of MICINN, Spain, and INFN, Italy, through the AIC-D-2011-0746 bilateral action
Published: 2012

23. Structure of the N = 50 As, Ge, Ga nuclei

Author: Sahin, E., de Angelis, G., Duchene, G., Faul, T., Gadea, A., Lisetskiy, A.F., Ackermann, D., Algora, A., Aydin, S., Azaiez, F., Bazzacco, D., Benzoni, G., Bostan, M., Byrski, T., Čeliković, I., Chapman, R., Corradi, L., Courtin, S., Curien, D., Datta Pramanik, U., Didierjean, F., Dorvaux, O., Erduran, M.N., Erturk, S., Farnea, E., Fioretto, E., de Frances, G., Franchoo, S., Gall, B., Gottardo, A., Guiot, B., Haas, F., Ibrahim, F., Ince, E., Khouaja A., Kusoglu, A., La Rana, G., Labiche, M., Lebhertz, D., Lenzi, S., Leoni, S., Lunardi, S., Mason, P., Mengoni, D., Michelagnoli, C., Modamio, V., Montagnoli, G., Montanari, D., Moro, R., Mouginot, B., Napoli, D.R., O’Donnell, D., Oliveira, J.R.B., Ollier, J., Orlandi, R., Pollarolo, G., Recchia, F., Robin, J., Salsac, M.-D., Scarlassara, F., Singh, R.P., Silvestri, R., Smith, J.F., Stefan, I., Stefanini, A.M., Subotić, K., Szilner, Suzana, Tonev, D., Torres, D.A., Trotta, M., Ujic, P., Ur, C., Valiente-Dobón, J.J., Verney, D., Yalcinkaya, M., Wadyn, P.T., Wiedemann, K.T., Zuber, K., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: nuclear reactions, magnetic spectrometer, Compton-suppressed detectors, shell model, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract: The level structures of the N = 50, 83As, 82Ge, and 81Ga isotones have been investigated by means of multi-nucleon transfer reactions. A first experiment was performed with the CLARA–PRISMA setup to identify these nuclei. A second experiment was carried out with the GASP array in order to deduce the γ -ray coincidence information. The results obtained on the high-spin states of such nuclei are used to test the stability of the N = 50 shell closure in the region of 78Ni (Z = 28). The comparison of the experimental level schemes with the shell-model calculations yields an N = 50 energy gap value of 4.7(3) MeV at Z = 28. This value, in a good agreement with the prediction of the finite-range liquid-drop model as well as with the recent large-scale shell model calculations, does not support a weakening of the N = 50 shell gap down to Z = 28.
Published: 2012

24. gamma-ray spectroscopy of neutron-rich S-40

Author: Wang, Z. M., Chapman, R., Liang, X., Haas, F., Azaiez, F., Behera, B.R., Burns, M., Caurier, E., Corradi, L., Curien, D., Deacon, A.N., Dombradi, Zs., Farnea, E., Fioretto, E., Gadea, A., Hodsdon, A., Ibrahim, F., Jungclaus, A., Keyes, K., Kumar, V., Latina, A., Lunardi, S., Marginean, N., Montagnoli, G., Napoli, D.R., Nowacki, F., Ollier, J., O’Donnell, D., Papenberg, A., Pollarolo, G., Salsac, M.-D., Scarlassara, F., Smith, J.F., Spohr, K.M., Stanoiu, M., Stefanini, A.M., Szilner, Suzana, Trotta, M., and Verney, D.
Subjects: Nuclear Theory, grazing collsions, 38Cl, PRISMA+CLARA, shell-model calculations, Nuclear Experiment
Abstract: Yrast states up to (6+) in the neutron-rich 40S nucleus have been studied using binary grazing reactions produced by the interaction of a 215 MeV beam of 36S ions with a thin 208Pb target. The novel experimental setup that combines the large acceptance magnetic spectrometer, PRISMA, and the high-efficiency γ -ray detection array, CLARA, was used. A new γ -ray transition at an energy of 1572 keV was observed and tentatively assigned to the (6+) → (4+) transition. A comparison of experimental observations and the results of large-scale 0hω sd-pf shell-model calculations indicates that one- and two-proton excitations from the 2s1/2 to the 1d3/2 orbitals play an important role in reproducing the 40S yrast level structure and the published B(E2 ; 0+g.s.→ 2+) value. The structure of the yrast states of the even-A isotopes of sulfur is interpreted in terms of the configurations of valence protons and neutrons within the context of large-scale 0hω sd-pf shell-model calculations.
Published: 2010

25. Proton-hole states in the N=30 neutron-rich 49K isotope

Author: Broda, R., Wrzesinski, J, Gadea, A., Marginean, N., Fornal, B., Corradi, L., Stefanini, A.M., Krolas, W., Pawlat, T., Szpak, B., Lunardi, S., Valiente-Dobon, J.J., Mengoni, D., Farnea, E., Carpenter, M.P., De Angelis, G., Della Vedova, F., Fioretto, E., Guiot, B., Janssens, R.V.F., Mantica, P.F., Mason, P., Montagnoli, G., Napoli, D.R., Orlandi, R., Pokrovskiy, I., Pollarolo, G., Sahin, E., Scarlassara, F., Silvestri, R., Szilner, Suzana, Ur, C.A., Trotta, M., and Zhu, S.
Subjects: multinucleon transfer reaction, particle-gamma coincidence, gamma-gamma coincidence, shell model, Nuclear Theory, Nuclear Experiment
Abstract: Excited states in the N = 30 neutron-rich 49K have been studied using multi-nucleon transfer reactions with thin targets and the PRISMA-CLARA spectrometer combined with thick-target - coincidence data from Gammasphere. The d3/2 proton-hole state is located 92 keV above the s1/2 ground state and the proton-particle f7/2 state is suggested at 2104 keV. Three other levels are established as involving the coupling to 2+ of two neutrons above the N = 28 shell. The measured or estimated lifetimes served to reinforce the interpretation of the observed level structure which is found to be in satisfactory agreement with shell model calculations.
Published: 2010

26. Lifetime measurements of excited states in neutron-rich 44, 46Ar populated via a multinucleon transfer reaction

Author: Mengoni, Daniele, Valiente-Dobon, J.J., Gadea, A., Lunardi, Santo, Lenzi, S.M., Broda, R., Dewald, A., Pissulla, T., Angus, L.J., Aydin, S., Bazzacco, D., Benzoni, G., Bizzeti, P.G., Bizzeti-Sona, A.M., Boutachkov, P., Corradi, Lorenzo, Crespi, F., de Angelis, G., Farnea, E., Fioretto, E., Goergen, A., Gorska, Magda, Gottardo, A., Grodner, E., Howard, A.M., Krolas, W., Leoni, S., Mason, P., Montanari, D., Montagnoli, G., Napoli, D.R., Obertelli, A., Orlandi, R., Pawlat, T., Pollarolo, G., Recchia, F., Algora, A., Rubio, B., Sahin, Eda, Scarlassara, F., Silvestri, R., Smith, J.F., Stefanini, A.M., Steppenbeck, D., Szilner, Suzana, Ur, C.A., Wady, P.T., and Wrzesinski, J.
Subjects: Nuclear Theory, multinucleon transfer reactions, the differential recoil distance Doppler shift method, lifetimes, shell-model calculations
Abstract: Lifetimes of low-lying excited states of the neutron-rich 44, 46Ar nuclei, populated via multinucleon transfer reactions, are measured by means of the differential recoil distance Doppler shift method. The extracted electromagnetic transition probabilities are compared with previous intermediate-energy Coulomb-excitation measurements and with large-scale shell-model calculations. The increase in the deduced B(E2 ; 2+→0+) transition probability from 44Ar to the closed-shell nucleus 46Ar contradicts the earlier results of Coulomb-excitation experiments. Shell-model calculations using different effective interactions agree with the new measured values.
Published: 2010

27. Spectroscopy of neutron-rich Dy-168,Dy-170: Yrast band evolution close to the NpNn valence maximum

Author: Algora, Alejandro, Gadea, Andrés, Soderstrom, P. A., Nyberg, J., Regan, P. H., De Angelis, G., Ashley, S. F., Aydin, S., Bazzacco, D., Casperson, R. J., Catford, W.N., Cederkäll, J., Chapman, R., Corradi, L., Fahlander, C., Farnea, E., Fioretto, E., Freeman, S. J., Gelletly, W., Gottardo, A., Grodner, E., He, C. Y., Jones, G. A., Keyes, K., Labiche, M., Liang, X., Liu, Z., Lunardi, S., Marginean, N., Mason, P., Menegazzo, R., Mengoni, D., Montagnoli, G., Napoli, D.R., Ollier, J., Pietri, S., Podolyák, Zs., Pollarolo, G., Recchia, F., Sahin, E., Scarlassara, F., Silvestri, R., Smith, J. F., Spohr, K. M., Steer, S. J., Stefanini, A. M., Szilner, S., Thompson, N. J., Tveten, G. M., Ur, C. A., Valiente-Dobón, J. J., Werner, V., Williams, S. J., Xu, F. R., and Zhu, J. Y.
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: The yrast sequence of the neutron-rich dysprosium isotope Dy-168 has been studied using multinucleon transfer reactions following collisions between a 460-MeV Se-82 beam and an Er-170 target. The reaction products were identified using the PRISMA magnetic spectrometer and the gamma rays detected using the CLARA HPGe-detector array. The 2(+) and 4(+) members of the previously measured ground-state rotational band of Dy-168 have been confirmed and the yrast band extended up to 10(+). A tentative candidate for the 4(+) -> 2(+) transition in Dy-170 was also identified. The data on these nuclei and on the lighter even-even dysprosium isotopes are interpreted in terms of total Routhian surface calculations and the evolution of collectivity in the vicinity of the proton-neutron valence product maximum is discussed., This work was partially supported by the European Commission within the Sixth Framework Programme through I3-EURONS contract RII3-CT-2004-506065, the Swedish Research Council, EPSRC/STFC (UK) and U.S. DOE grant No. DE-FG02-91ER40609.
Published: 2010

28. γ-ray spectroscopy of neutron-rich 40S

Author: M. Wang, Z., Chapman, R., Liang, X., Haas, F., Azaiez, F., R. Behera, B., Burns, M., Caurier, E., Corradi, L., Curien, D., N. Deacon, A., Dombrádi, Zs., Farnea, E., Fioretto, E., Gadea, A., Hodsdon, A., Ibrahim, F., Jungclaus, A., Keyes, K., Kumar, V., Latina, A., Lunardi, S., Mărginean, N., Montagnoli, G., R. Napoli, D., Nowacki, F., Ollier, J., O'Donnell, D., Papenberg, A., Pollarolo, G., Salsac, M.-D., Scarlassara, F., F. Smith, J., M. Spohr, K., Stanoiu, M., M. Stefanini, A., Szilner, S., Trotta, M., Verney, D., Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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: Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: Yrast states up to (6+) in the neutron-rich 40S nucleus have been studied using binary grazing reactions produced by the interaction of a 215 MeV beam of 36S ions with a thin 208Pb target. The novel experimental setup that combines the large acceptance magnetic spectrometer, PRISMA, and the high-efficiency γ-ray detection array, CLARA, was used. A new γ-ray transition at an energy of 1572 keV was observed and tentatively assigned to the (6+)→(4+) transition. A comparison of experimental observations and the results of large-scale 0ℏω sd-pf shell-model calculations indicates that one- and two-proton excitations from the 2s1/2 to the 1d3/2 orbitals play an important role in reproducing the 40S yrast level structure and the published B(E2;0g.s.+→21+) value. The structure of the yrast states of the even-A isotopes of sulfur is interpreted in terms of the configurations of valence protons and neutrons within the context of large-scale 0ℏω sd-pf shell-model calculations.
Published: 2010

29. Spectroscopy of neutron-rich 168, 170Dy : Yrast band evolution close to the NpNn valence maximum

Author: Soderstrom, P.-A., Nyberg, J., Regan, P.H., Ashley, S.F., Catford, W.N., Gelletly, W., Jones, G.A., Liu, Z., Pietri, S., Podolyak, Zs., Steer, S.J., Thompson, N.J., Williams, S.J., Algora, A., de Angelis, G., Corradi, L., Fioretto, E., Gottardo, A., Grodner, E., He, C.Y., Napoli, D., Recchia, F., Sahin, E., Silvestri, R., Stefanini, A.M., Valiente-Dobon, J.J., Aydin, S., Bazzacco, D., Farnea, E., Lunardi, S., Mason, P., Menegazzo, R., Mengoni, D., Montagnoli, G., Scarlassara, F., Ur, C.A., Casperson, R.J., Werner, V., Cederkall, J., Chapman, R., Keyes, K., Labiche, M., Liang, X., Smith, J.F., Spohr, K.-M., Fahlander, C., Freeman, S.J., Gadea, A., Marginean, N., Ollier, J., Pollarolo, G., Szilner, S., Tveten, G.M., Xu, F.R., and Zhu, J.Y.
Subjects: nuclear structure, yrast band, transfer reaction, Nuclear Theory, FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: The yrast sequence of the neutron-rich dysprosium isotope 168Dy has been studied using multi-nucleon transfer reactions following collisions between a 460-MeV 82Se beam and a 170Er target. The reaction products were identified using the PRISMA magnetic spectrometer and the gamma rays detected using the CLARA HPGe-detector array. The 2+ and 4+ members of the previously measured ground state rotational band of 168Dy have been confirmed and the yrast band extended up to 10+. A tentative candidate for the 4+ to 2+ transition in 170Dy was also identified. The data on these nuclei and on the lighter even-even dysprosium isotopes are interpreted in terms of Total Routhian Surface calculations and the evolution of collectivity in the vicinity of the proton-neutron valence product maximum is discussed., 15 pages, 7 figures, submitted to Phys. Rev. C
Published: 2010

30. Evolution of deformation in the neutron-rich krypton isotopes: The 96Kr nucleus

Author: Mărginean, N., Bucurescu, D., Ur, C. A., Mihai, C., Corradi, L., Farnea, E., Filipescu, D., Fioretto, E., Ghiă, D., Guiot, B., Górska, M., Ionescu-Bujor, M., Iordăchescu, A., Jelavić-Malenica, D., Lenzi, S. M., Mason, P., Mărginean, R., Mengoni, D., Montagnoli, G., Napoli, D. R., Pascu, S., Pollarolo, G., Recchia, F., Stefanini, A. M., Silvestri, R., Sava, T., Scarlassara, F., Szilner, Suzana, and Zamfir, N. V.
Subjects: Nuclear Theory, spectrometer PRISMA, fission, quadrupole collectivity, Nuclear Experiment
Abstract: The energy of the first excited 2+ state in 96Kr was measured as 241 keV. The nucleus was produced in the fission of 238U induced by a 954-MeV 136Xe beam and prompt rays were observed using the clover array CLARA in coincidence with fission products identified with the PRISMA spectrometer. The evolution of the quadrupole collectivity in the Kr isotopes with N50 is discussed by comparison with that from the Rb to Mo isotones and with predictions of various theoretical calculations.
Published: 2009

31. Lifetime measurements of the neutron-rich N=30 isotones 50Ca and 51Sc: Orbital dependence of effective charges in the fp shell

Author: Valiente-Dobon, J. J., Mengoni, D., Gadea, A., Farnea, E., Lenzi, S. M., Lunardi, S., Dewald, A., Pissulla, T., Szilner, Suzana, Stefanini, A. M., Broda, R., Recchia, F., Algora, A., Angus, L., Bazzacco, D., Benzoni, G., Bizzeti, P. G., Bizzeti-Sona, A. M., Boutachkov, P., Corradi, L., Crespi, F., de Angelsi, G., Fioretto, E., Gorgen, A., Gorska, M., Gottardo, A.: Grodner, E., Howard, A., Krolas, W., Leoni, S., Mason, P., Menegazzo, R., Montanari, D., Montagnoli, G., Napoli, D. R., Obertelli, A., Pawlat, T., Rubio, B., Sahin, E., Scarlassara, F., Smith, J. F., Steppenbeck, D., Ur, C. A., Wady, P. T., Wrzesinski, J., Maglione, E., and Hamamoto, I.
Subjects: lifetime measurement, fp shell, 50Ca, 51Sc, effective charges, Nuclear Theory, Nuclear Experiment
Abstract: The lifetimes of the first excited states of the N=30 istones 50Ca and 51Sc have been determined using a novel techinique that combines the Recoil Distance Doppler Shift method with the CLARA-PRISMA sepctrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This exteneds the lifetime knowledge beyond the f7/2 shell closure and allows to derive the effective proton and neutron charges in the fp shell near the doubly-magic nucleus 48Ca, using large-scale shell-model claculations. These results seem to indicate an orbital dependence of the core polarization along the fp shell.
Published: 2009

32. Lifetime Measurements of the Neutron-Rich N=30 Isotones Ca-50 and Sc-51: Orbital Dependence of Effective Charges in the fp Shell

Author: Valiente-Dobón, J. J., Mengoni, D., Gadea, Andrés, Farnea, E., Lenzi, Silvia M., Lunardi, S., Dewald, A., Pissulla, Th., Szilner, S., Broda, R., Recchia, F., Algora, Alejandro, Agus, L., Bazzacco, D., Benzoni, G., Bizzeti, P. G., Bizzeti-Sona, A. M., Boutachkov, P., Corradi, L., Crespi, F.C.L., De Angelis, G., Fioretto, E., Görgen, A., Gorska, M., Gottardo, A., Grodner, E., Guiot, B., Howard, A., Krolas, W., Leoni, Silvia, Mason, P., Menegazzo, R., Montanari, D., Montagnoli, G., Napoli, D. R., Obertelli, A., Pawlat, T., Rubio, Berta, Sahin, E., Scarlassara, F., Silvestri, R., Stefanini, A. M., Smith, J. F., Steppenbeck, D., Ur, C. A., Wady, P. T., Wrzesinksi, J, Maglione, E., and Hanamoto, I.
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: The lifetimes of the first excited states of the N=30 isotones Ca-50 and Sc-51 have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f(7/2) shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus Ca-48, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.
Published: 2009

33. Lifetime measurements using the CLARA-PRISMA setup around the (48)Ca doubly-magic nucleus

Author: Valiente-Dobon, J. J., Mengoni, D., Gadea, A., Farnea, E., Lenzi, S. M., Lunardi, S., Dewald, A., Pissulla, T., Szilner, S., Stefanini, A. M., Broda, R., Angus, L., Bazzacco, D., Benzoni, G., Bizzeti, P. G., Bizzeti-Sona, A. M., Boutachkov, P., Corradi, L., Crespi, F., Angelis, G., Fioretto, E., Gorgen, A., Gorska, M., Gottardo, A., Grodner, E., Howard, A., Krolas, W., Leoni, S., Mason, P., Montanari, D., Montagnoli, G., Napoli, D. R., Obertelli, A., Pawlat, T., Recchia, F., Algora, A., Berta Rubio, Sahin, E., Scarlassara, F., Smithl, J. F., Steppenbeck, D., Ur, C. A., Wady, P. T., Wrzesinski, J., Demetriou, P., Julin, R., and Harissopulos, S.V.
Subjects: doubly-magic nucleus 48Ca, lifetime measurement, Recoil Distance Doppler Shift, Nuclear Theory, Nuclear Experiment
Abstract: The lifetimes of the first excited states of nuclei around the doubly-magic nucleus 48Ca have been determined using a novel method that combines the Recoil Distance Doppler Shift (RDDS) method with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This novel method and some preliminary results on lifetimes are presented.
Published: 2008

34. Yrast structure of the neutron-rich N=31 isotones (51)Ca and (52)Sc

Author: Fornal, B, Janssens, RVF, Broda, R, Marginean, N, Beghini, S, Corradi, L, Carpenter, MP, De Angelis, G, Della Vedova, F, Farnea, E, Fioretto, E, Gadea, A, Guiot, B, Honma, M, Krolas, W, Lauritsen, T, Lunardi, S, Mantica, PF, Mason, P, Montagnoli, G, Napoli, DR, Otsuka, Taka, Pawlat, T, Pollarolo, Giulia, Scarlassara, F, Stefanini, AM, Seweryniak, D, Szilner, S, Ur, CA, Trotta, M, Valiente-Dobon, JJ, Wrzesinski, J, and Zhu, S
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: The low-lying yrast states in the 51 Ca and 52 Sc nuclei were investigated to obtain information on the evolution of the p 1 / 2 and f 5 / 2 neutron single-particle orbitals in neutron-rich nuclei near proton number Z = 20. Level structures associated with neutron excitations into these two orbitals and with proton excitations across the Z = 20 shell gap were identified. Shell-model calculations with the recently proposed GXPF1A interaction account reasonably well for the fp -shell states. The energy separation between the νp 1 / 2 and νf 5 / 2 orbitals in the Ca isotopes appears to be overestimated by the GXPF1A Hamiltonian. ispartof: Physical Review C, Nuclear Physics vol:77 issue:1 status: published
Published: 2008

35. Yrast structure of the neutron-rich N=31 isotones Ca51 and Sc52

Author: Fornal, B., Janssens, R. V. F., Broda, R., Marginean, N., Beghini, S., Corradi, L., Carpenter, M. P., De Angelis, G., Della Vedova, F., Farnea, E., Fioretto, E., Gadea, A., Guiot, B., Honma, M., Krolas, W., Lauritsen, T., Lunardi, S., Mantica, P. F., Mason, P., Montagnoli, G., Napoli, D. R., Otsuka, T., Pawlat, T., Pollarolo, G., Scarlassara, F., Stefanini, A. M., Seweryniak, D., Szilner, Suzana, C. Ur, A., Trotta, Monica, Valiente-Dobon, Javier-Jose, Wrzesinski, J., and Zhu, S.
Subjects: yrats states, 51Ca, 52Sc, shellmodel calculation GXPF1A, Nuclear Theory, Nuclear Experiment
Abstract: The low-lying yrast states in the Ca-51 and Sc-52 nuclei were investigated to obtain information on the evolution of the p(1/2) and f(5/2) neutron single-particle orbitals in neutron-rich nuclei near proton number Z=20. Level structures associated with neutron excitations into these two orbitals and with proton excitations across the Z=20 shell gap were identified. Shell-model calculations with the recently proposed GXPF1A interaction account reasonably well for the fp-shell states. The energy separation between the nu p(1/2) and nu f(5/2) orbitals in the Ca isotopes appears to be overestimated by the GXPF1A Hamiltonian.
Published: 2008
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36. gamma--ray spectroscopy of the neutron-rich nuclei 89Rb, 92Y, and 93Y with multinucleon transfer reactions

Author: Bucurescu, D., Rusu, C., M&#259rginean, N., Ur, C.A., De Angelis, G., Corradi, L., Bazzacco, D., Beghini, S., Della Vedova, F., Duchene, G., Farnea, E., Faul, T., Fioretto, E., Gadea, A., Gelletly, W., Guiot, B., Ionescu-Bujor, M., Iord&#259chescu, A., Landown, S.D., Lenzi, S.M., Lunardi, S., Mason, P., Mihai, C., M&#259rginean, R., Menegazzo, R., Montagnoli, G., Napoli, D., Podolyák, Zs., Regan, P.H., Scarlassara, F., Stefanini, A.M., Suliman, G., Szilner, S., Trotta, M., Valiente-Dobón, J.J., Zhang, Y.H., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and PRISMA-CLARA
Subjects: neutron rich 89Rb, 92Y, and 93Y, level scheme grazing reaction, PRISMA spectrometer, CLARA array, shell-model calculation, Astrophysics::High Energy Astrophysical Phenomena, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Nuclear Theory, 21.60.Cs, 23.20.Lv, 25.70.Jj, 27.60.+j, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: The positive-parity yrast states in the 89Rb, 92Y, and 93Y nuclei were studied using gamma-ray spectroscopy with heavy-ion induced reactions. In the multinucleon transfer reactions 208Pb+90Zr (590 MeV) and 238U+82Se (505 MeV), several gamma-ray transitions were identified in these nuclei by means of coincidences between recoiling ions identified with the PRISMA spectrometer and gamma rays detected with the CLARA gamma-ray array in thin target experiments. Level schemes were subsequently determined from triple gamma coincidences recorded with the GASP array in a thick target experiment, in the reactions produced by a 470 MeV 82Se beam with a 192Os target. The observed level schemes are compared to shell-model calculations.
Published: 2007

37. Spectroscopy of neutron-rich Fe isotopes populated in the 64Ni+238U reaction

Author: Lunardi, S., Lenzi, S.M., Della Vedova, F., Farnea, E., Gadea, A., M&#259rginean, N., Bazzacco, D., Beghini, S., Bizzeti, P.G., Bizzeti-Sona, A.M., Bucurescu, D., Corradi, L., Deacon, A.N., De Angelis, G., Fioretto, E., Freeman, S.J., Ionescu-Bujor, M., Iordachescu, A., Mason, P., Mengoni, D., Montagnoli, G., Napoli, D.R., Nowacki, F., Orlandi, R., Pollarolo, G., Recchia, F., Scarlassara, F., Smith, J.F., Stefanini, A.M., Szilner, S., Ur, C.A., Valiente-Dobón, J.J., Varley, B.J., Département Recherches Subatomiques (DRS-IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
Subjects: 21.10.Re, 21.60.Cs, 23.20.Lv, 27.50.+e, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, reaction 64Ni+238U, neutron-rich Fe isotopes, level structure, shell model calculations
Abstract: The neutron-rich Fe isotopes from A=61 to 66 were studied through multinucleon transfer reactions by bombarding a $^{238}$U target with a 400 MeV $^{64}$Ni beam. Unambiguous identification of prompt $\gamma$ rays belonging to each nucleus was achieved using coincidence relationships with the ions detected in a high-acceptance magnetic spectrometer. The new data extend our knowledge of the level structure of Fe isotopes, which is discussed in terms of the systematics of the region and compared with large-scale shell-model calculations.
Published: 2007

38. Gamma-ray Spectroscopy of the Neutron-Rich Nuclei Rb-89, Y-92, and Y-93 with Multinucleon Transfer Reactions

Author: Bucurescu, D, Rusu, C, Marginean, N, Ur, C A, de Angelis, G, Corradi, L, Bazzacco, D, Beghini, S, Della Vedova, F, Duchene, G, Farnea, E, Faul, T, Fioretto, E, Gadea, A, Gelletly, W, Guiot, B, Ionescu-Bujor, M, Lordachescu, A, Landown, S D, Lenzi, S M, Lunardi, S, Mason, P, Mihai, C, Marginean, R, Menegazzo, R, Montagnoli, G, Napoli, D, Podolyak, Z, Regan, P H, Scarlassara, F, Stefanini, A M, Suliman, G, Szilner, S, Trotta, M, Valiente-Dobon, J J, and Zhang, Y H
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
Abstract: The positive-parity yrast states in the Rb-89, Y-92, and Y-93 nuclei were studied using gamma-ray spectroscopy with heavy-ion induced reactions. In the multinucleon transfer reactions Pb-208+Zr-90 (590 MeV) and U-238+Se-82 (505 MeV), several gamma-ray transitions were identified in these nuclei by means of coincidences between recoiling ions identified with the PRISMA spectrometer and gamma rays detected with the CLARA gamma-ray array in thin target experiments. Level schemes were subsequently determined from triple-gamma coincidences recorded with the GASP array in a thick target experiment, in the reactions produced by a 470 MeV Se-82 beam with a Os-192 target. The observed level schemes are compared to shell-model calculations.
Published: 2007

39. Spectroscopy of neutron-rich $^{37}$P

Author: Hodsdon, A., Chapman, R., Liang, X., Haas, F., Ollier, J., Caurier, E., Nowacki, F., Salsac, M.-D., Azaiez, F., Beghini, S., Behera, B., Burns, M., Corradi, L., Curien, D., Deacon, A.N., Dombrádi, Zs., Farnea, E., Fioretto, E., Gadea, A., Jungclaus, A., L. Keyes, K., Latina, A., M&#259rginean, N., Montagnoli, G., Napoli, D., O'Donnell, D., Papenberg, A., Scarlassara, F., Smith, J.F., Spohr, K.-M., Stanoiu, M., Stefanini, A., Szilner, S., Trotta, M., Ur, C., Verney, D., Wang, Z., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and 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: neutron rich 37P, level scheme grazing reaction, PRISMA spectrometer, CLARA array, shell-model calculation, 23.20.Lv, 25.70.Lm, 27.30.+t, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: The excited states of the neutron-rich nucleus $_{15}^{37}P_{22}$ have been populated in grazing reactions, using a beam of $^{36}$S ions (at 215 MeV) delivered onto a thin $^{208}$Pb target. Emitted $\gamma$ rays from excited projectile-like nuclei were detected using the CLARA array of 25 escape-suppressed Ge clover detectors in coincidence with reaction products detected and identified with the PRISMA magnetic spectrometer. A level scheme is presented for $^{37}$P together with proposed spin assignments. The level structure of $^{37}$P is discussed within the context of shell-model calculations by using an improved sdpf effective interaction.
Published: 2007

40. Spectroscopy of moderately neutron-rich nuclei with CLARA-PRISMA setup

Author: Gadea, A., Marginean, N., Farnea, E., Lenzi, S.M., de Angelis, G., Napoli, D.R., Corradi, L., Stefanini, A.M., Fioretto, E., Szilner, Suzana, Axiotis, M., Behera, B.R., Latina, A., Rusu, C., Zhimin, W., Valiente-Dobon, V.V., Pokrovskiy, I., Bazzacco, D., Beghini, S., Ur, C.A., Lunardi, S., Montagnoli, G., Menegazzo, R., Scarlassara, F., della Vedova, F., Bracco, A., Camera, F., Leoni, S., Million, B., Pignanelli, M., Pollarolo, G., Trotta, M., Bizzeti, P.G., Bizzeti-Sona, A.M., Duchene, G., Curien, D., Chapman, R., Liang, X., Azaiez, F., Stanoiu, M., Freeman, S.J., Varley, B.J., Pucknell, V., Harissopulos, S., Demetriou, P., and Julin, R.
Subjects: deep-inelastic and multi-nucleon transfer reactions, CLARA-PRISMA setup, nuclear structure, neutron-rich nuclei, Nuclear Theory, Nuclear Experiment
Abstract: Deep-inelastic and multi-nucleon transfer reactions can be used to populate nuclei with relatively large neutron excess. Recently, at the Laboratori Nazionali di Legnaro, a setup consisting on an efficient gamma-ray detection system CLARA coupled to the large acceptance magnetic spectrometer PRISMA, capable of tracking the trajectories of the reaction products, has been assembled. During the first year of activity, the experiments performed with the CLARA-PRISMA setup, have been focused mainly on the nuclear structure of neutron-rich nuclei. In particular, nuclei around N=20, N=50 and lying in the A~60 transitional region with
Published: 2006

41. Fusion hindrance and quasi-fission in heavy-ion induced reactions: Disentangling the effect of different parameters

Author: Fioretto, E., Trotta, M., Steafnini, A.M., Behera, B.R., Chizhov, A.Yu., Corradi, L., Courtin, S., Gadea, A., Gomes, P.R.S., Haas, F., Itkis, I.M., Itkis, G.M., Kniajeva, G.N., Kondratiev, N.A., Kozulin, E.M., Latina, A., Montagnoli, G., Pokrovsky, I.V., Rowley, N., Sagaidak, R.N., Scarlassara, F., Szanto de Toledo, A., Szilner, Suzana, Voskressensky, V.M., Harissopulos, S., Demetriou, P, and Julin, R.
Subjects: Ca induced fusion close to the Coulomb barrier, quasi-fission mechanism, fusion inhibition effect, Nuclear Theory, Nuclear Experiment
Abstract: Experimental results on the fusion inhibition effect near the Coulomb barrier due to the onset of the quasi-fission mechanism are presented. The investigation was focused on reactions induced by 48Ca projectiles on different heavy targets and comparing them to reactions induced by light ions such as ^12C and ^16O leading to the same compound nuclei. Cross sections and angular distributions of evaporation residues and fission fragments have been measured.
Published: 2005

42. multinucleon transfer processes in $^{40}$Ca+$^{208}$Pb

Author: Szilner, S., Corradi, L., Pollarolo, G., Beghini, S., Behera, B.R., Fioretto, E., Gadea, A., Haas, F., Latina, A., Montagnoli, G., Scarlassara, F., Stefanini, A.M., Trotta, M., Vinodkumar, A.M., Wu, Y., Institut de Recherches Subatomiques (IReS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
Subjects: 25.70.Hi,24.10.-i,25.70.Bc, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: Multinucleon transfer reactions in $^{40}$Ca+$^{208}$Pb have been studied at bombarding energies close to the Coulomb barrier. Projectilelike fragments have been identified in nuclear mass and charge with a time-of-flight spectrometer. Angular and total kinetic energy loss distributions and inclusive cross sections have been compared with those of semiclassical models. The analysis shows that a successive transfer mechanism of single nucleons does not account for the data, and a direct nucleon pair transfer has to be included in the description. Nucleon evaporation effects are taken into account.
Published: 2005

43. Unexpected entrance-channel effect in the fission of $^{216}$Ra

Author: Chizhov, A. Yu, Itkis, M. G., Itkis, I. M., Kniajeva, G. N., Kozulin, E. M., Kondratiev, N. A., Pokrovsky, I. V., Sagaidak, R. N., Voskressensky, V. M., Yeremin, A. V., Corradi, L., Gadea, A., Latina, A., Stefanini, A. M., Szilner, S., Trotta, M., Vinodkumar, A. M., Beghini, S., Montagnoli, G., Fernando Scarlassara, Rusanov, A. Ya, Hanappe, F., Dorvaux, O., Rowley, N., Stuttgé, L., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette
Subjects: heavy-ion reactions, quasi-fission, bimodal fission, mass-asymmetry, fusion, nucleus, modes, collisions, quasifission, relaxation, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: We have studied the mass and energy distributions of fission fragments from the two reactions 12C+204Pb and 48Ca+168Er that lead to the same compound nucleus 216Ra*. Despite the fact that the excitation energy was around 40 MeV in both cases, the contribution from asymmetric fission in the first reaction is only around 1.5% but is about 30% in the second. This marked increase in the yield of asymmetric products is connected to the quasifission process, in which important shell effects become evident. The mass-energy distributions are interpreted in terms of an independent decay mode competing with the normal fusion-fission process and possibly leading to a significant suppression of the fusion cross section itself.
Published: 2003

44. Production of n-rich Nuclei along the Closed Shell N=126 in the collision 136Xe + 208Pb @E lab =870 MeV

Author: I. M. Harca, A. Pulcini, G. N. Knyazheva, I. M. Itkis, F. Scarlassara, K. V. Novikov, G. Montagnoli, E. M. Kozulin, Tea Mijatović, A. M. Stefanini, E. Fioretto, L. Corradi, Wladyslaw Henryk Trzaska, Emanuele Vardaci, V. A. Zagrebaev, D. Montanari, D. Quero, Suzana Szilner, G. La Rana, Mandaglio, Giuseppe, Trifirò, Antonio, Trimarchi, Marina, Giuseppe Mandaglio, Antonio Trifirò, Marina Trimarchi, Quero, D., Vardaci, E., Kozulin, E. M., Zagrebaev, V. A., Corradi, L., Pulcini, A., La Rana, G., Itkis, I. M., Knyazheva, G. N., Novikov, K., Harca, I., Fioretto, E., Stefanini, A. M., Montanari, D., Montagnoli, G., Scarlassara, F., Szilner, S., Mijatovic, T., and Trzaska, W. H.
Subjects: Physics, Nuclear physics, History, nuclear physics, Nuclear Theory, Production (computer science), Collision, Nuclear Experiment, ydinfysiikka, Open shell, Computer Science Applications, Education
Abstract: Multi-nucleon transfer reactions are nowadays the only known mean to produce neutron-rich nuclei in the Terra Incognita. The closed-shell region N=126 is crucial for both studying shell-quenching in exotic nuclei and the r-process, being its last "waiting-point". The choice of suitable reactions is challenging and a favorable case is 136Xe+208Pb, near the Coulomb barrier, because their neutron shell-closures play a stabilizing role, favoring the proton-transfer from lead to xenon. TOF-TOF data were analyzed to reconstruct the mass-energy distribution of the primary fragments. Preliminary results of an experiment held at Laboratori Nazionali di Legnaro with PRISMA, aimed at A and Z identification of the products, will be shown. peerReviewed
Published: 2018

45. The study of neutron-rich nuclei production in the region of the closed shell N=126 in the multi-nucleon transfer reaction 136Xe+208Pb

Author: E. Fioretto, J.M. Itkis, G. N. Knyazheva, D. Quero, Emanuele Vardaci, A. M. Stefanini, S. N. Dmitriev, J. J. Valiente-Dobón, E. M. Kozulin, Wladyslaw Henryk Trzaska, D. Montanari, E. Strano, J. Piot, I. M. Harca, Dieter Ackermann, G. G. Chubarian, G. Montagnoli, G. Pollarolo, L. Corradi, K. V. Novikov, T. Loktev, S. Szilner, F. Scarlassara, Tea Mijatović, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Novikov, K., Harca, I. M., Kozulin, E. M., Dmitriev, S., Itkis, J., Knyazheva, G., Loktev, T., Corradi, L., Valiente Dobon, J., Fioretto, E., Montanari, D., Stefanini, A. M., Vardaci, Emanuele, Quero, Daniele, Montagnoli, G., Scarlassara, F., Strano, E., Pollarolo, G., Piot, J., Mijatović, T., Szilner, S., Ackermann, D., Chubarian, G., and Trzaska, W. H.
Subjects: History, nuclear astro-physics, Proton, Nuclear Theory, spektrometrit, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Education, Nuclear physics, Xenon, Nucleosynthesis, neutron-rich nuclei, 0103 physical sciences, Nuclear astrophysics, chemical elements, Neutron, 010306 general physics, Nuclear Experiment, Open shell, heavy neutron rich nuclei, PRISMA spectrometer, Physics, neutron shells, Spectrometer, 010308 nuclear & particles physics, beam lines, closed shells, Computer Science Applications, neutron beams, chemistry, time of flight, Atomic physics, Nucleon
Abstract: Expérience LNL/PRISMA; International audience; The unexplored area of heavy neutron rich nuclei is extremely important for nuclearastrophysics investigations and, in particular, for the understanding of the r-process ofastrophysical nucleogenesis. For the production of heavy neutron rich nuclei located along theneutron closed shell N=126 (probably the last "waiting point" in the r-process of nucleosynthesis)the low-energy multi-nucleon transfer reaction 136Xe+208Pb at Elab=870MeV was explored.Due to the stabilizing eect of the closed neutron shells in both nuclei, N=82 and N=126, andthe rather favorable proton transfer from lead to xenon, the light fragments formed in this processare well bound and the Q-value of the reaction is nearly zero.Measurements were performed with the PRISMA spectrometer in coincidence with an additionaltime-of-flight (ToF) arm on the +20 beam line of the PIAVE-ALPI accelerator in Legnaro, Italy.The PRISMA spectrometer allows identication of the A, Z and velocity of the projectile-likefragments (PLF), while the second arm gives access to the target-like fragments (TLF).Details on the experimental setup and preliminary results are reported.
Published: 2016

46. Nuclear structure far from stability at the N=50 shell closure

Author: E. Sahin, G. de Angelis, A. Gadea, G. Duchene, T. Faul, D. R. Napoli, E. Farnea, J. J. Valiente-Dobón, R. Orlandi, D. Mengoni, F. Della Vedova, R. P. Singh, C. Ur, F. Recchia, M. N. Erduran, M. Bostan, S. Erturk, S. Aydin, K. T. Wiedemann, A. M. Stefanini, S. Lenzi, S. Lunardi, N. Marginean, L. Corradi, E. Fioretto, G. Montagnoli, F. Scarlassara, P. Mason, S. Szilner, D. Ackermann, G. Pollarolo, J. R. B. Oliveira, T. Byrski, D. Curien, B. Gall, F. Haas, O. Dorwaux, J. Robin, M. Nespolo, F. Azaiez, G. De France, A. Algora, X. Liang, F. Nowacki, Y. H. Zhang, X. H. Zhou, P. Demetriou, R. Julin, S. V. Harissopulos, Institut Pluridisciplinaire Hubert Curien (IPHC), 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), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), Sahin, E., Department of Physics, Istanbul University, Istanbul, 34134, Turkey, INFN, Laboratori Nazionali di Legnaro, Italy -- De Angelis, G., INFN, Laboratori Nazionali di Legnaro, Italy -- Gadea, A., INFN, Laboratori Nazionali di Legnaro, Italy -- Duchene, G., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Faul, T., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Napoli, D.R., INFN, Laboratori Nazionali di Legnaro, Italy -- Farnea, E., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Valiente-Dobón, J.J., INFN, Laboratori Nazionali di Legnaro, Italy -- Orlandi, R., INFN, Laboratori Nazionali di Legnaro, Italy -- Mengoni, D., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Vedova, F.D., INFN, Laboratori Nazionali di Legnaro, Italy -- Singh, R.P., Inter-University Accelerator Center, New Delhi-67, India -- Ur, C., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Recchia, F., INFN, Laboratori Nazionali di Legnaro, Italy -- Erduran, M.N., Department of Physics, Istanbul University, Istanbul, 34134, Turkey -- Bostan, M., Department of Physics, Istanbul University, Istanbul, 34134, Turkey -- Erturk, S., Department of Physics, Nigde University, Nigde, Turkey -- Aydin, S., Department of Physics, Cukurova University, Adana, Turkey -- Wiedemann, K.T., University of São Paulo, Sãu Paulo, Brazil -- Stefanini, A.M., INFN, Laboratori Nazionali di Legnaro, Italy -- Lenzi, S., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Lunardi, S., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Marginean, N., INFN, Laboratori Nazionali di Legnaro, Italy -- Corradi, L., INFN, Laboratori Nazionali di Legnaro, Italy -- Fioretto, E., INFN, Laboratori Nazionali di Legnaro, Italy -- Montagnoli, G., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Scarlassara, F., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Mason, P., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Szilner, S., Ruder Boskovic Institute, Zagreb Crotia, HR-1002, Croatia -- Ackermann, D., Kernphysik II, Gesellschaft für Schwerionenforschung MbH A GSI, Planckstr.1, Darmstadt, D-64291, Germany -- Pollarolo, G., Dipartimento di Fisica Teorica, Universitá di Torino and INFN, Sezione di Torino, Italy -- Oliveira, J.R.B., University of São Paulo, Sãu Paulo, Brazil -- Byrski, T., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Curien, D., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Gall, B., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Haas, F., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Dorwaux, O., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Robin, J., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Nespolo, M., Dipartimento di Fisica, Universitá di Padova and INFN, Sezione di Padova, Padova, Italy -- Azaiez, F., IPNO, IN2P3/CNRS et Universit Paris-Sud, Orsay, F-91406, France -- De France, G., GANIL Caen 2c013, France -- Algora, A., Institute of Nuclear Research, Debrecen, Pf. 51, H-4001, Hungary -- Liang, X., Electronic Engineering and Physics, University of Paisley, Paisley, PA1 2BE, United Kingdom -- Nowacki, F., IPHC, IN2P3/CNRS et Univesitè Louis Pasteur, BP 28, Strasburg-Cedex-2, F-67037, France -- Zhang, Y.H., Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China -- Zhou, X.H., Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China, Demetriou, P., Julin, R., Harissopulos, S.V., Çukurova Üniversitesi, Demetriuo, P, Harissopulos, SV, Napoli, Daniel Ricardo -- 0000-0002-8154-6958, Algora, Alejandro -- 0000-0002-5199-1794, Gadea, Andres -- 0000-0002-4233-1970, Oliveira, Jose Roberto -- 0000-0003-1362-7382, de France, Gilles -- 0000-0002-7439-1759, Montagnoli, Giovanna -- 0000-0002-8944-1456, Ackermann, Dieter -- 0000-0001-6284-1516, Sahin, Eda -- 0000-0003-0683-5140, [Sahin, E. -- Erduran, M. N. -- Bostan, M.] Istanbul Univ, Dept Phys, TR-34134 Istanbul, Turkey -- [Sahin, E. -- de Angelis, G. -- Gadea, A. -- Napoli, D. R. -- Valiente-Dobon, J. J. -- Orlandi, R. -- Della Vedova, F. -- Recchia, F. -- Stefanini, A. M. -- Marginean, N. -- Corradi, L. -- Fioretto, E.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, Legnaro, Italy -- [Duchene, G. -- Faul, T. -- Byrski, T. -- Curien, D. -- Gall, B. -- Haas, F. -- Dorwaux, O. -- Robin, J. -- Nowacki, F.] Univ Louis Pasteur, IPHC, IN2P3, CNRS, F-67037 Strasbourg 2, France -- [Farnea, E. -- Mengoni, D. -- Ur, C. -- Lenzi, S. -- Lunardi, S. -- Montagnoli, G. -- Scarlassara, E. -- Mason, P. -- Nespolo, M.] Univ Padua, Dipartimento Fis, Padua, Italy -- [Farnea, E. -- Mengoni, D. -- Ur, C. -- Lenzi, S. -- Lunardi, S. -- Montagnoli, G. -- Scarlassara, E. -- Mason, P. -- Nespolo, M.] Ist Nazl Fis Nucl, Sezione Padova, Padua, Italy -- [Singh, R. P.] Inter Univ Accelerator Ctr, New Delhi 67, India -- [Erturk, S.] Nigde Univ, Dept Phys, Nigde, Turkey -- [Aydin, S.] Cukurova Univ, Dept Phys, Adana, Turkey -- [Wiedemann, K. T. -- Oliveira, J. R. B.] Univ Sao Paulo, Sao Paulo, Brazil -- [Szilner, S.] Rudjer Boskovic Inst, Zagreb 1002, Croatia -- [Ackermann, D.] GSI Helmholtzzentrum Schwerionenforsch mbH, Kernphys 2, D-64291 Darmstadt, Germany -- [Pollarolo, G.] Univ Turin, Dipartmento Fis Teor, Turin, Italy -- [Pollarolo, G.] Ist Nazl Fis Nucl, Sezione Torino, Turin, Italy -- [Azaiez, E.] Univ Paris 11, IPNO, IN2P3, CNRS, F-91406 Orsay, France -- [De France, G.] GANIL, F-2013 Caen, France -- [Algora, A.] Inst Nucl Res, H-4001 Debrecen, Hungary -- [Liang, X.] Univ Paisley, Elect Engn & Phys, Paisley PA1 2BE, Renfrew, Scotland -- [Zhang, Y. H. -- Zhou, X. H.] Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China, and 0-Belirlenecek
Subjects: Spin states, neutron-rich, multi-nucleon transfer, Nuclear Theory, Shell (structure), Closure (topology), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, single-particle state, 0103 physical sciences, 010306 general physics, deep inelastic, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Nuclear structure, Nuclear shell model, Gamma ray, shell model, isotones N=50, muliti-nucleon transfer, shell closure, Deep inelastic scattering, 0-Belirlenecek, Excited state, Atomic physics
Abstract: Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions -- SEP 10-14, 2007 -- Crete, GREECE, WOS: 000256223700023, Medium and high spin states of the nuclei close to the N=50 shell closure are investigated Using deep inelastic and multi-nucleon transfer reactions. New excited states of the nuclei Ga-81, Ge-82 and As-83 at N=50 shell closure have been identified by means of the Se-82+U-238 reaction. Gamma rays have been acquired using the PRISMA-CLARA setup of the Laboratori Nazionali di Legnaro, Italy (LNL)., NCSR, Univ Jyvaskyla, Natl Tech Univ Athens, Greek Minist Educ, U.S. Department of Energy [DE-AC05-00OR22725], I wish to thank the staff of HRIBF for their dedication in the production of RIBs. This talk is based on work done in collaboration with various individuals: C. Baktash, J. Batchelder, J.R. Beene, B. Fuentes, J. Gomez del Campo, C.J. Gross, M.L. Halbert, P.A. Hausladen, Y. Larochelle, J. F.Liang, P.E. Mueller, E. Padilla-Rodal, D.C. Radford, D. Shapira, D.W. Stracener, J. P. Urrego, R.L. Varner and C.-H. Yu. Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.

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