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1. The decay of the 21.47-MeV stretched resonance in 13C: A precise probe of the open nuclear quantum system description

Author

N. Cieplicka-Oryńczak, Y. Jaganathen, B. Fornal, S. Leoni, M. Płoszajczak, M. Ciemała, S. Ziliani, M. Kmiecik, A. Maj, J. Łukasik, P. Pawłowski, B. Sowicki, B. Wasilewska, M. Ziębliński, P. Bednarczyk, C. Boiano, S. Bottoni, A. Bracco, S. Brambilla, I. Burducea, F. Camera, I. Ciepał, C. Clisu, F.C.L. Crespi, K. Dhanmeher, N. Florea, E. Gamba, J. Grębosz, M.N. Harakeh, D.A. Iancu, Ł.W. Iskra, M. Krzysiek, P. Kulessa, N. Marginean, R. Marginean, I. Matea, M. Matejska-Minda, K. Mazurek, B. Million, W. Parol, M. Sferrazza, L. Stan, and B. Włoch

Subjects
13C, Nuclear structure, Stretched resonance states, Gamow Shell Model, Physics, QC1-999
Abstract

The decay of the 21.47-MeV stretched resonance in 13C, arising from p3/2→d5/2 nucleon excitation coupled to maximum spin, was investigated in a (p,p′) experiment at 135 MeV proton bombarding energy, performed at the Cyclotron Centre Bronowice (CCB) at IFJ PAN in Krakow. First experimental information on the proton and neutron decay branches from this state was obtained by using coincidence measurement of protons inelastically scattered on a 13C target and γ rays from daughter nuclei, namely, 12B (proton decay) and 12C (neutron decay). The main branches lead to the Jπ=2+, first-excited state at 0.953 MeV in 12B, and to the Jπ=1+, T=1 level at 15.110 MeV in 12C. The results were compared with predictions from the Gamow Shell Model (GSM), which was used to describe the stretched resonance in terms of its energy, width, electromagnetic transition strengths and decay pattern. A very good agreement was obtained between the measured and calculated properties of the 21.47-MeV stretched resonance in 13C, demonstrating the high-quality and precision of the GSM wave function calculations, which include coupling to the resonant and non-resonant particle continuum.

Published
2022
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2. Characterization of Diamond and Silicon Carbide Detectors With Fission Fragments

Author

M. L. Gallin-Martel, Y. H. Kim, L. Abbassi, A. Bes, C. Boiano, S. Brambilla, J. Collot, G. Colombi, T. Crozes, S. Curtoni, D. Dauvergne, C. Destouches, F. Donatini, L. Gallin-Martel, O. Ghouini, J. Y. Hostachy, Ł. W. Iskra, M. Jastrzab, G. Kessedjian, U. Köster, A. Lacoste, A. Lyoussi, S. Marcatili, J. F. Motte, J. F. Muraz, T. Nowak, L. Ottaviani, J. Pernot, A. Portier, W. Rahajandraibe, M. Ramdhane, M. Rydygier, C. Sage, A. Tchoualack, L. Tribouilloy, and M. Yamouni

Subjects
solid-state detectors, diamond detectors, silicon carbide detectors, heavy-ion detectors, radiation-hard detectors, fission fragment, Physics, QC1-999
Abstract

Experimental fission studies for reaction physics or nuclear spectroscopy can profit from fast, efficient, and radiation-resistant fission fragment (FF) detectors. When such experiments are performed in-beam in intense thermal neutron beams, additional constraints arise in terms of target-detector interface, beam-induced background, etc. Therefore, wide gap semi-conductor detectors were tested with the aim of developing innovative instrumentation for such applications. The detector characterization was performed with mass- and energy-separated fission fragment beams at the ILL (Institut Laue Langevin) LOHENGRIN spectrometer. Two single crystal diamonds, three polycrystalline and one diamond-on-iridium as well as a silicon carbide detector were characterized as solid state ionization chamber for FF detection. Timing measurements were performed with a 500-µm thick single crystal diamond detector read out by a broadband amplifier. A timing resolution of ∼10.2 ps RMS was obtained for FF with mass A = 98 at 90 MeV kinetic energy. Using a spectroscopic preamplifier developed at INFN-Milano, the energy resolution measured for the same FF was found to be slightly better for a ∼50-µm thin single crystal diamond detector (∼1.4% RMS) than for the 500-µm thick one (∼1.6% RMS), while a value of 3.4% RMS was obtained with the 400-µm silicon carbide detector. The Pulse Height Defect (PHD), which is significant in silicon detectors, was also investigated with the two single crystal diamond detectors. The comparison with results from α and triton measurements enabled us to conclude that PHD leads to ∼50% loss of the initial generated charge carriers for FF. In view of these results, a possible detector configuration and integration for in-beam experiments has been discussed.

Published
2021
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3. Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O

Author

L. Pellegri, A. Bracco, F.C.L. Crespi, S. Leoni, F. Camera, E.G. Lanza, M. Kmiecik, A. Maj, R. Avigo, G. Benzoni, N. Blasi, C. Boiano, S. Bottoni, S. Brambilla, S. Ceruti, A. Giaz, B. Million, A.I. Morales, R. Nicolini, V. Vandone, O. Wieland, D. Bazzacco, P. Bednarczyk, M. Bellato, B. Birkenbach, D. Bortolato, B. Cederwall, L. Charles, M. Ciemala, G. De Angelis, P. Désesquelles, J. Eberth, E. Farnea, A. Gadea, R. Gernhäuser, A. Görgen, A. Gottardo, J. Grebosz, H. Hess, R. Isocrate, J. Jolie, D. Judson, A. Jungclaus, N. Karkour, M. Krzysiek, E. Litvinova, S. Lunardi, K. Mazurek, D. Mengoni, C. Michelagnoli, R. Menegazzo, P. Molini, D.R. Napoli, A. Pullia, B. Quintana, F. Recchia, P. Reiter, M.D. Salsac, B. Siebeck, S. Siem, J. Simpson, P.-A. Söderström, O. Stezowski, Ch. Theisen, C. Ur, J.J. Valiente Dobon, and M. Zieblinski

Subjects
Physics, QC1-999
Abstract

The γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented ΔE–E silicon telescopes. The angular distribution was measured both for the γ rays and the scattered 17O ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (γ,γ′) and (α,α′γ) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1− excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density. Keywords: Low-lying electric dipole excitations, 124Sn, Isospin character

Published
2014
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4. Conceptual design of the AGATA 2π array at LNL

Author

J.J. Valiente-Dobón, R. Menegazzo, A. Goasduff, D. Agguiaro, P. Aguilera, F. Angelini, M. Balogh, D. Bazzacco, J. Benito, G. Benzoni, N. Bez, M. Bolognesi, S. Bottoni, D. Brugnara, S. Carollo, P. Cocconi, A. Cogo, J. Collado, F.C.L. Crespi, A. Ertoprak, R. Escudeiro, F. Galtarossa, E.R. Gamba, A. Gambalonga, B. Góngora Servín, A. Gottardo, A. Gozzelino, M. Gulmini, Z. Huang, T. Marchi, D. Mengoni, P. Modanese, D.R. Napoli, J. Pellumaj, R.M. Pérez-Vidal, S. Pigliapoco, E. Pilotto, L. Ramina, M. Rampazzo, W. Raniero, M. Rebeschini, K. Rezynkina, D. Rosso, M. Scarcioffolo, D. Scarpa, M. Sedlák, R. Smith, N. Toniolo, F. Veronese, V. Volpe, L. Zago, I. Zanon, G. Zhang, R. Abels, M.L. Allegrini, C. Aufranc, G. Baulieu, C. Belkhiria, M. Benettoni, D. Benini, M. Bentley, M. Biasotto, M. Blaizot, J. Blasco Miquel, C. Boiano, A. Boston, H. Boston, A. Boujrad, P. Bourgault, A. Bracco, S. Brambilla, I. Burrows, F. Camera, S. Capra, A. Capsoni, R. Cash, J.V. Civera, E. Clément, S. Coelli, M. Cordwell, L. Corradi, S. Coudert, G. De Angelis, L. De Ruvo, G. Debras, M. Del Fabbro, J. Diklić, N. Dosme, G. Duchene, B. Duclos, J. Dudouet, J. Eberth, S. Elloumi, C. Everett, S. Fantinel, M. Fillinger, E. Fioretto, C. Fransen, A. Gadea, L. Gibelin, V. González, J. Goupil, C. Görgen, A. Grant, K. Green, J. Ha, T. Hartnett, K. Henseler, H. Hess, R. Hirsch, C. Houarner, J. Jacob, T. Joannem, D.S. Judson, N. Karkour, M. Karolak, M. Kebbiri, J. Kieffer, M. Labiche, X. Lafay, P. Le Jeannic, A. Lefevre, E. Legay, F. Legruel, S. Lenzi, S. Leoni, D. Linget, M. Liptrot, A. López-Martens, A. Lotodé, L. Manara, L. Ménager, T. Mijatović, B. Million, A. Minarello, G. Montagnoli, P. Morrall, I. Mullacrane, J. Nyberg, G. Philippon, M. Polettini, F. Popieul, A. Pullia, F. Recchia, P. Reiter, G. Richardt, M. Rocchini, A. Roger, F. Saillant, E. Sanchis, Md.S.R. Laskar, G. Secci, M.-H. Sigward, J. Simpson, N. Solenne, F. Spee, A.M. Stefanini, O. Stézowski, S. Szilner, N. Templeton, Ch. Theisen, S. Thiel, F. Tomasi, S. Tzvetkov, D. Vigano, E. Viscione, O. Wieland, K. Wimmer, G. Wittwer, M. Zielińska, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), 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), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), 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
AGATA spectrometer, DANTE detector, EUCLIDES detector, LNL facility, Plunger device, PRISMA spectrometer, Pulse shape analysis, TRACE detector, γ-ray tracking, Nuclear and High Energy Physics, Settore FIS/04 - Fisica Nucleare e Subnucleare, ray tracking, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation
Abstract

International audience; The Advanced GAmma Tracking Array (AGATA) has been installed at Laboratori Nazionali di Legnaro (LNL), Italy. In this installation, AGATA will consist, at the beginning, of 13 AGATA triple clusters (ATCs) with an angular coverage of 1π, and progressively the number of ATCs will increase up to a 2π angular coverage. This setup will exploit both stable and radioactive ion beams delivered by the Tandem–PIAVE-ALPI accelerator complex and the SPES facility. The new implementation of AGATA at LNL will be used in two different configurations, firstly one coupled to the PRISMA large-acceptance magnetic spectrometer and lately a second one at Zero Degrees, along the beam line. These two configurations will allow us to cover a broad physics program, using different reaction mechanisms, such as Coulomb excitation, fusion-evaporation, transfer and fission at energies close to the Coulomb barrier. These setups have been designed to be coupled with a large variety of complementary detectors such as charged particle detectors, neutron detectors, heavy-ion detectors, high-energy γ-ray arrays, cryogenic and gasjet targets and the plunger device for lifetime measurements. We present in this paper the conceptual design, characteristics and performance figures of this implementation of AGATA at LNL.

Published
2023

5. M4 Resonances in Light Nuclei Studied at CCB

Author

N. Cieplicka-Oryńczak, B. Fornal, M. Ciemała, M. Kmiecik, A. Maj, J. Łukasik, P. Pawłowski, B. Sowicki, B. Wasilewska, M. Ziębliński, P. Bednarczyk, I. Ciepał, K. Dhanmeher, J. Grębosz, Ł.W. Iskra, M. Krzysiek, M. Matejska-Minda, K. Mazurek, W. Parol, B. Włoch, C. Boiano, S. Brambilla, B. Million, Y. Jaganathen, M. Płoszajczak, I. Burducea, C. Clisu, N. Florea, D.A. Iancu, N. Marginean, R. Marginean, L. Stan, M.N. Harakeh, P. Kulessa, I. Matea, M. Sferrazza, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], General Physics and Astronomy
Abstract

International audience; M4 resonances in light nuclei result from the p3/2 → d5/2 stretched excitations. Their configurations should be relatively simple, which makes them good benchmarks for the theoretical calculations taking into account the role of continuum couplings. The first experimental studies aiming at tracing the decay of the M4 stretched resonance in 13C, located at 21.47 MeV, were undertaken at the Cyclotron Centre Bronowice at the Institute of Nuclear Physics Polish Academy of Sciences in Kraków, Poland (IFJ PAN). They provided information on the proton and neutron decay channels of this resonance to 12B and 12C daughter nuclei, respectively. These experimental results were then compared with the theoretical calculations based on the Gamow Shell Model approach, in terms of energy, width, and in particular, the decay pattern. Furthermore, the studies of the next cases, namely, 14N and 16O, where several M4 resonances appear at around 20 MeV, have been recently performed at CCB. The new experimental findings will serve as a testing ground for future calculations describing the heavier nuclei in this important region of the nuclear chart.

Published
2022

6. Decay of the 'stretched' M4 resonance in 13C

Author

D.A. Iancu, P. Kulessa, L. Stan, Y. Jaganathen, S. Bottoni, A. Maj, N. Marginean, Michele Sferrazza, S. Brambilla, P. Pawłowski, S. Ziliani, A. Bracco, M. Kmiecik, J. Łukasik, Ł. W. Iskra, B. Fornal, K. Mazurek, I. Burducea, S. Leoni, C. Boiano, R. Marginean, N. Florea, C. Clisu, F. Camera, B. Sowicki, M. Płoszajczak, M.N. Harakeh, N. Cieplicka-Oryńczak, M. Krzysiek, M. Ciemala, M. Zieblinski, J. Grebosz, B. Wasilewska, M. Matejska-Minda, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Research unit Nuclear & Hadron Physics

Subjects
Physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Proton, Nuclear Theory, Continuum (design consultancy), Cyclotron, SHELL model, General Physics and Astronomy, Resonance (particle physics), Coincidence, law.invention, Nuclear physics, law, Neutron, Nuclear Experiment
Abstract

International audience; “Stretched” states are examples of the simplest nuclear excitations in the continuum, thus offering an excellent testing ground for various theoretical approaches. The decay of the stretched single-particle state in 13C, located at 21.47 MeV, was investigated in an experiment performed recently at the Cyclotron Centre Bronowice (CCB) at IFJ PAN in Kraków. First experimental information on the proton and neutron decay channels of this resonance was obtained by employing coincidence measurement of protons inelastically scattered on the 13C target and γ rays from daughter nuclei. The new experimental findings will be used for testing predictions obtained by the Gamow Shell Model calculations.

Published
2020

7. Spectroscopy of neutron-rich nitrogen isotopes with Agata+Paris+Vamos

Author

S. Ziliani, M. Ciemała, F.C.L. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S.M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D.R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Ziliani, S., Ciemała, M., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clément, E., Coelli, S., Dorvaux, O., Erturk, S., de France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, Ł. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Müller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, Ch., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut 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), Institut Laue-Langevin (ILL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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 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), ILL, and Research unit Nuclear & Hadron Physics

Subjects
Physics, education.field_of_study, Spectrometer, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, Gamma ray, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Excited state, 0103 physical sciences, Neutron, AGATA, 010306 general physics, Spectroscopy, education, Beam (structure)
Abstract

Excited states of 17N, 18N and 19N were investigated through the measurement of gamma rays, following their population via deep-inelastic reactions induced by an 18O beam (7 MeV/u) on a thick 181Ta target. The experimental setup comprised the AGATA+PARIS detection system, coupled to the VAMOS++ magnetic spectrometer. In the 17N nucleus, the analysis of gamma-ray transitions de-exciting two states around 4-5 MeV clearly pointed to discrepancies with the lifetime values reported in literature. Three new gamma rays were observed in 18N at the energies of 1662.3 (3) keV, 2073.4 (8) keV and 2300.9 (8) keV, and hints for other two new transitions around 1566 keV and 1720 keV were found. In addition, a new transition with energy of 2489.7 (8) keV was observed in 19N.

Published
2020

8. Ultimate Performance of the FARCOS Detection System

Author

L. Acosta, L. Auditore, C. Boiano, G. Cardella, A. Castoldi, M. D'Andrea, E. De Filippo, S. De Luca, F. Favela, F. Fichera, N. Giudice, B. Gnoffo, A. Grimaldi, C. Guazzoni, G. Lanzalone, F. Librizzi, C. Maiolino, N.S. Martorana, S. Norella, A. Pagano, E. V. Pagano, M. Papa, T. Parsani, G. Passaro, S. Pirrone, G. Politi, L. Quattrocchi, F. Risitano, F. Rizzo, P. Russotto, G. Sacca, G. Salemi, D. Sciliberto, V.L. Sicari, A. Trifiro, and M. Trimarchi

Published
2021

9. Complete set of bound negative-parity states in the neutron-rich nucleus 18N

Author

S. Ziliani, M. Ciemała, F. C. L. Crespi, S. Leoni, B. Fornal, T. Suzuki, T. Otsuka, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M. N. Harakeh, Ł. W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S. M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D. R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Ziębliński, M. Zielińska, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Set (abstract data type), Physics, Particle physics, medicine.anatomical_structure, 010308 nuclear & particles physics, 0103 physical sciences, medicine, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Parity (mathematics), 01 natural sciences, Nucleus
Abstract

International audience; High-resolution γ-ray spectroscopy of N18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O18 beam on a Ta181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N18 below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 01− and 12− excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in N16 and N18, for the first time. Understanding the N18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.

Published
2021

10. High resolution gamma-ray spectrometry using GALILEO array

Author

D. Testov, J.J. Valiente-Dobon, D. Mengoni, F. Recchia, A. Goasduff, A. Boso, S. Lenzi, G. de Angelis, S. Bakes, C. Boiano, B. Cederwall, G. Colucci, M. Cicerchia, P. Colovic, F. Didierjean, M. Doncel, J.A. Duenas, F. Galtarossa, A. Gozzelino, K. Hadynska-Klek, R. Isocrate, G. Jaworski, P.R. John, H. Liu, S. Lunardi, R. Menegazzo, A. Mentana, V. Modamio, A. Nannini, D.R. Napoli, M. Palacz, G. Pasqualato, M. Rocchini, S. Riccetto, B. Saygi, E. Sahin, M. Siciliano, Yu. Sobolev, and S. Szilner

Subjects
Physics, γ -ray spectrometer, Nuclear and High Energy Physics, Radiation, Physics and Astronomy (miscellaneous), business.industry, Materials Science (miscellaneous), High resolution, γ -ray spectroscopy, nuclearstate lifetime, Condensed Matter Physics, lcsh:QC1-999, Optics, nuclear structure, Galileo (vibration training), business, lcsh:Physics, Gamma ray spectrometry
Abstract

The GALILEO γ -ray spectrometer has been constructed at the Legnaro National Laboratory of INFN (LNL-INFN). It can be coupled to advanced ancillary devices which allows nuclear structure studies employing the variety of in-beam γ -ray spectroscopy methods. Such studies benefit from reactions induced by the intense stable beams delivered by the Tandem-ALPI-PIAVE accelerator complex and by the radioactive beams which will be provided by the SPES facility. In this paper we outline two experiments performed within the experimental campaign at GALILEO coupled to the EUCLIDES Si-ball and the Neutron Wall array. The first one was aimed at spectroscopic studies in A=31 mirror nuclei and the second one at measurements of lifetimes of excited states in nuclei in the vicinity of 100 Sn.

Published
2019

11. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions

Author

M. Zieblinski, J. Grebosz, K. Mazurek, Simone Coelli, S. Brambilla, H. J. Li, B. Million, M. Rejmund, Bertrand Jacquot, P. Bednarczyk, N. Cieplicka-Oryńczak, M. Ciemala, M. Bast, S. Ziliani, O. Dorvaux, S. Erturk, Eric Clément, Ł. W. Iskra, C. Fransen, S. M. Lenzi, B. Fornal, P. J. Napiorkowski, C. Müller-Gatermann, M. Zielińska, B. Wasilewska, I. Matea, A. Maj, M. Kmiecik, Y. H. Kim, M. Kicińska-Habior, C. Michelagnoli, I. Stefan, M. Beckers, F. C. L. Crespi, O. Wieland, M. Lewitowicz, R. Palit, D. R. Napoli, Ch. Schmitt, A. V. Karpov, M. Stanoiu, F. Camera, Emanuele Vardaci, M. Matejska-Minda, A. Bracco, G. Benzoni, S. Bottoni, S. Leoni, V. Nanal, C. Boiano, A. Lemasson, Mohsen Harakeh, Thomas Braunroth, A. Goldkuhle, 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), 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 Laue-Langevin (ILL), ILL, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Ciemala, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, C., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., H. Niewodniczanski Institute of Nuclear Physics, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Dipartimento di Fisica (Milano), Università degli Studi di Milano [Milano] (UNIMI), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Institut für Kernphysik der Universität zu Köln, Universität zu Köln, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano = University of Milan (UNIMI), Universität zu Köln = University of Cologne, 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), and Nuclear Energy

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Monte Carlo method, Hadron, FOS: Physical sciences, Binary number, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Excited state, 0103 physical sciences, Nuclear fusion, AGATA, Nuclear Experiment (nucl-ex), Connection (algebraic framework), Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range in products of low-energy heavy-ion binary reactions, with complex velocity distributions. The method is based on a detailed study of Doppler-broadened $$\gamma $$ γ -ray lineshapes. Its relevance is demonstrated in connection with the $$^{18}\text {O}(7.0\, \text {MeV/u})+\,^{181}\text {Ta}$$ 18 O ( 7.0 MeV/u ) + 181 Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in $$^{17}\text {O}$$ 17 O and $$^{19}\text {O}$$ 19 O , with known lifetimes, are used to validate the method over the $$\sim 20{-}400\,\text {fs}$$ ∼ 20 - 400 fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by $$\gamma $$ γ -tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.

Published
2021

12. The GALILEO γ-ray array at the Legnaro National Laboratories

Author

R. Menegazzo, I. Zanon, F. Veronese, D.A. Testov, J. Ha, N. Bez, B. Million, G. Pasqualato, Alberto Pullia, M. Biasotto, L. Ramina, S. Bottoni, C. A. Ur, M. L. Cortés, D. Mengoni, S. Coelli, G. Gosta, C. Fanin, M. Siciliano, A. Saltarelli, D. Bazzacco, D. Tomasella, J. J. Valiente-Dobón, S. Leoni, M. Romanato, S. Ventura, A. Gadea, N. Toniolo, Marco Bellato, Diego Barrientos, S. Brambilla, D. Brugnara, R.M. Pérez-Vidal, F. Recchia, F. C. L. Crespi, F.J. Egea, S. Lunardi, S. Capra, M. Rebeschini, S. Fantinel, G. Jaworski, A. Bracco, M. Gulmini, G. Rampazzo, M. Scarcioffolo, N. Blasi, J. Pellumaj, S. Pigliapoco, G. Benzoni, V. Volpe, P. Cocconi, A. Boso, O. Wieland, K. Hadyńska-Klȩk, E.R. Gamba, A. Capsoni, A. Gambalonga, E. Viscione, F. Camera, G. de Angelis, A. Nannini, Roberto Isocrate, C. Boiano, A. Illana, M. Rocchini, G. Zhang, A. Gottardo, A. Goasduff, C. Gesmundo, P. R. John, N. Marchini, S. Ziliani, K. Rezynkina, D. R. Napoli, E. Gregor, A. Gozzelino, D. Rosso, M. Rampazzo, V. Modamio, M. Polettini, M. Magalini, F. Tomasi, S. M. Lenzi, and C. Porzio

Subjects
Physics, Nuclear and High Energy Physics, Silicon, business.industry, Instrumentation, High-resolution γ-ray spectroscopy, Detector, Neutron, DAQ, Electronics, HPGe, Semiconductor detector, Optics, Data acquisition, Galileo (vibration training), business, Hpge detector
Abstract

GALILEO, a new 4 π high-resolution γ -detection array, based on HPGe detectors, has been developed and installed at the Legnaro National Laboratories. The GALILEO array greatly benefits from a fully-digital read-out chain, customized DAQ, and a variety of complementary detectors to improve the resolving power by the detection of particles, ions or high-energy γ -ray transitions. In this work, a full description of the array, including electronics and DAQ, is presented together with its complementary instrumentation.

Published
2021

13. Octupole correlations near Te 110

Author

Maria Doncel, D. Bazzacco, A. Goasduff, S. M. Lenzi, G. Jaworski, G. de Angelis, F. Didierjean, L. M. Robledo, Huan Liu, R. Menegazzo, M. Siciliano, F. Nowacki, D. Mengoni, D. A. Testov, S. Lunardi, Tomás R. Rodríguez, B. Saygi, Bo Cederwall, Yu. Sobolev, F. Recchia, S. Bakes, G. Colucci, M. Rocchini, P. Čolović, J. A. Dueñas, C. Boiano, G. Pasqualato, Suzana Szilner, A. Mentana, Magda Cicerchia, A. Gozzelino, K. Hadynska-Klek, A. Boso, F. Galtarossa, P. R. John, J. J. Valiente-Dobón, D. R. Napoli, S. Frauendorf, S. Riccetto, and UAM. Departamento de Física Teórica

Subjects
Physics, Engineering management, Spin, Work (electrical), 010308 nuclear & particles physics, Chiral, 0103 physical sciences, Física, 010306 general physics, 01 natural sciences, Shell Model, Nucleus, Band
Abstract

The lifetime of the 2(+) and 9(-), 11(-), 13(-), 15(-) states in the neutron-deficient Te-110 was measured for the first time using the recoil distance Doppler shift technique. The reported value of the reduced transition probability B(E2; 0(g.s)(+) -> 2(+)) = 4.3(8) x 10(3) e(2) f m(4) supports the systematic for even-mass Te isotopes and was interpreted g.s in the framework of the large-scale shell model and cranked shell model calculations. The measured reduced transition probabilities in the negative-parity yrast band revealed the upward trend towards the high spins. The enhanced collectivity is discussed in terms of the tilted axis cranking approach and the symmetry configuration mixing method with the Gogny D1S interaction., DoE [DE-FG02-95ER4093]; Spanish MICINN [PGC2018-094583-B-I00], The authors would like to thank the technical staff of the LNL Legnaro facility for their assistance in providing excellent operation of the XTU-tandem accelerator. The authors wish to acknowledge the support of local engineers P. Cocconi and R. Isocrate. The work was partially supported by the DoE Grant No. DE-FG02-95ER4093 and Spanish MICINN Grant No. PGC2018-094583-B-I00.

Published
2021

14. Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2+ state in C16 and O20

Author

M. Ciemała, S. Ziliani, F. C. L. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, S. Coelli, O. Dorvaux, S. Erturk, G. de France, C. Fransen, A. Goldkuhle, J. Grębosz, M. N. Harakeh, Ł. W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, S. M. Lenzi, M. Lewitowicz, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, M. Matejska-Minda, B. Million, C. Müller-Gatermann, V. Nanal, P. Napiorkowski, D. R. Napoli, R. Palit, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, E. Vardaci, B. Wasilewska, O. Wieland, M. Zieblinski, M. Zielińska, A. Ataç, D. Barrientos, B. Birkenbach, A. J. Boston, B. Cederwall, L. Charles, J. Collado, D. M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Dudouet, J. Eberth, V. González, J. Goupil, L. J. Harkness-Brennan, H. Hess, D. S. Judson, A. Jungclaus, W. Korten, M. Labiche, A. Lefevre, R. Menegazzo, D. Mengoni, J. Nyberg, R. M. Perez-Vidal, Zs. Podolyak, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M. D. Salsac, E. Sanchis, O. Stezowski, Ch. Theisen, J. J. Valiente-Dobón, J. D. Holt, J. Menéndez, A. Schwenk, and J. Simonis

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Nuclear structure, Ab initio, Neutron, State (functional analysis), Atomic physics, 010306 general physics, 7. Clean energy, 01 natural sciences, Nuclear theory
Abstract

To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2(+) state in neutron-rich O-20, tau(2(2)(+)) = 150(-30)(+80) fs, and an estimate for the lifetime of ...

Published
2020

15. Lifetime measurements using a plunger device and the EUCLIDES Si array at the GALILEO $\gamma$-ray spectrometer

Author

S. Bakes, S. M. Lenzi, P. R. John, Yu. G. Sobolev, Suzana Szilner, G. Pasqualato, J. J. Valiente-Dobón, A. Gozzelino, F. Galtarossa, H. Liu, D. Testov, C. Müller-Gatermann, M. Rocchini, J. Bradbury, F. Recchia, G. Jaworski, K. Hadyńska-Klȩk, D. R. Napoli, M. Doncel, S. Riccetto, B. Saygi, A. Mentana, J. A. Dueñas, A. Goasduff, G. de Angelis, D. Bazzacco, A. Boso, F. Didierjean, P. Čolović, Bo Cederwall, R. Menegazzo, S. Lunardi, M. Siciliano, C. Boiano, Magda Cicerchia, D. Mengoni, G. Colucci, 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), and Ege Üniversitesi

Subjects
Nuclear and High Energy Physics, Lifetime measurements, 01 natural sciences, 7. Clean energy, Nuclear physics, symbols.namesake, Recoil, 0103 physical sciences, 010306 general physics, Instrumentation, Physics, [PHYS]Physics [physics], gamma-ray spectroscopy gamma-ray spectrometer, Range (particle radiation), Plunger, Spectrometer, 010308 nuclear & particles physics, γ-ray spectroscopy γ-ray spectrometer, Detector, Si-array, ?-ray spectroscopy ?-ray spectrometer, Picosecond, Excited state, symbols, Galileo (vibration training), Doppler effect
Abstract

The GALILEO ?-ray spectrometer, installed at the Laboratori Nazionali di Legnaro (LNL), benefits from intense stable beams provided by the Tandem-ALPI-PIAVE accelerator complex and from radioactive beams to be delivered in the near future by the SPES facility. The spectrometer is complemented with a variety of ancillary devices to allow for nuclear structure and reaction studies. The 4? Si-ball array EUCLIDES coupled to the GALILEO ?-ray spectrometer represents one of the commonly used setup for experiments aiming at spectroscopic studies. High-efficiency detection of light-charged particles in a fusion–evaporation reaction guarantees good discrimination of different reaction channels and provides essential information for the kinematic reconstruction. In this paper we discuss a configuration of the EUCLIDES array developed for the lifetime measurements of nuclear excited states populated in a fusion–evaporation reaction. In such a configuration a part of the EUCLIDES detectors is disassembled allowing for the installation of a plunger device in the reaction chamber. The reduced configuration of EUCLIDES provides high detection efficiency necessary for reliable light charged-particle discrimination. We report on the commissioning experiment focused on the 58Ni(58Ni,3p)113I reaction. The lifetimes of 11/2? and 15/2? states were measured by applying the Recoil Distance Doppler Shift method to be equal to 206(20) ps and 7.9(12) ps correspondingly and were in good agreement with the values cited in the literature. Thus, the combination of the GALILEO and EUCLIDES arrays, and the plunger device has resulted in a powerful experimental setup to determine lifetimes of excited states in neutron-deficient nuclei in the picosecond range. © 2020 Elsevier B.V., Fondazione Cassa di Risparmio di Padova e Rovigo Narodowe Centrum Nauki, NCN: 2017/25/B/ST2/01569 Narodowym Centrum Nauki, NCN, The authors would like to thank the technical staff of the LNL-INFN facility for their assistance in providing excellent operation of the XTU-Tandem accelerator. The authors wish to acknowledge the support of local engineers P. Cocconi and R. Isocrate. The work of G. Jaworski was supported by the National Science Centre, Poland (NCN) (grant no. 2017/25/B/ST2/01569 ). A. Goasduff acknowledges the support of the CARIPARO foundation under the Starting Grant 2017 .

Published
2020

16. Be 9 + p breakup at 5.67A MeV in a full kinematics approach

Author

Pakou, A. Sgouros, O. Soukeras, V. Cappuzzello, F. Acosta, L. Agodi, C. Boiano, A. Calabrese, S. Carbone, D. Cavallaro, M. Deshmukh, N.N. Foti, A. Hacisalihoglu, A. Keeley, N. La Commara, M. Martel, I. Mazzocco, M. Muoio, A. Parascandolo, C. Pierroutsakou, D. Rusek, K. Sanchez-Benitez, A.M. Santagati, G. Souliotis, G. Spatafora, A. Strano, E. Torresi, D. Trzcinska, A.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The exclusive breakup of the Borromean nucleus Be9 incident on a proton target at 5.67 MeV/nucleon was studied with a triple coincidence requirement between the two breakup α fragments and the recoiling proton. The analysis was performed using an event-by-event code in a full kinematics approach, and Q-value spectra, relative spectra, and energy spectra of all reaction products were determined. Clear signatures of the three breakup modes: α+α+n, Be8+n, and He5+He4 were observed in the recoiling proton spectra and the rates of these modes were quantified. © 2020 American Physical Society.

Published
2020

17. A clear signature of the breakup modes for Be-9 on a proton target at 5.6 MeV/nucleon

Author

Pakou, A. Sgouros, O. Soukeras, V Cappuzzello, F. and Acosta, L. Agodi, C. Boiano, A. Calabrese, S. Carbone, D. Cavallaro, M. Deshmukh, N. N. Foti, A. and Hacisalihoglou, A. Keeley, N. La Commara, M. Martel, I and Mazzocco, M. Muoio, A. Parascandolo, C. Pierroutsakou, D. and Rusek, K. Sanchez-Benitez, A. M. Santagati, G. and Souliotis, G. Spatafora, A. Strano, E. Torresi, D. and Trzcinska, A.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The breakup of Be-9 is studied via an inelastic scattering experiment on a proton target at 5.6 A MeV in inverse kinematics. Two of the three cluster constituents (alpha and alpha) as well as the proton target recoil were recorded in a triple coincidence mode allowing a full kinematics approach analysis. In this respect relative alpha - alpha and alpha - n, Q-value and Be-9 excitation spectra, energy spectra for all fragments as well as the energy spectrum of the recoil proton were reconstructed. A clear signature of the two breakup sequential modes (He-5 + He-4 and Be-8 + n) was identified via the recoiling proton reconstructed spectra together with the direct breakup decay. A strong He-5+He-4 mode was observed compatible with previous beta decay experiments.

Published
2020

18. The FARCOS detection system: the first application in a real experiment

Author

T. Parsani, Chiara Guazzoni, P. Russotto, E. V. Pagano, F. Fichera, D. Sciliberto, F. De Benedetti, V. L. Sicari, S. Norella, L. Quattrocchi, A. Pagano, Antonio Trifiro, S. Pirrone, S. De Luca, Andrea Castoldi, Lucrezia Auditore, F. Favela, S. Maffesanti, F. Rizzo, C. Boiano, E. Geraci, G. Lanzalone, G. Cardella, C. Maiolino, N. Giudice, F. Librizzi, Luis Acosta, Marina Trimarchi, A. Grimaldi, Michele Papa, B. Gnoffo, E. De Filippo, N. S. Martorana, G. Politi, G. Salemi, M. D'Andrea, G. Passaro, and G. Sacca

Subjects
Materials science, Calorimeter (particle physics), Silicon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Detector, chemistry.chemical_element, Scintillator, Modular design, 01 natural sciences, 030218 nuclear medicine & medical imaging, Photodiode, law.invention, 03 medical and health sciences, 0302 clinical medicine, Optics, chemistry, law, 0103 physical sciences, Stage (hydrology), business
Abstract

FARCOS is a modular detection system intended to boost the capacity of 4π detectors towards correlation measurements. The final FARCOS system will be composed of 20 telescopes, each formed by two Si layers of 32-ch orthogonal Double Sided Silicon Strip Detectors and one calorimeter stage composed by 4 CsI(Tl) tronco-pyramidal scintillator crystals readout by a Si photodiode. The paper focuses on the first application of the FARCOS detection array in the present configuration of 10 telescopes in a real experiment, the CHIFAR experiment and discusses the main instrumental features relevant for the experiments.

Published
2019

19. Elastic scattering for the B8 and Be7+Pb208 systems at near-Coulomb barrier energies

Author

Shigeru Kubono, Luis Acosta, C. Manea, Y. H. Kim, Y. X. Watanabe, S. Kimura, P. Di Meo, V. Soukeras, Y. Y. Yang, Hiroari Miyatake, Efstathios Stiliaris, G. La Rana, Yusuke Wakabayashi, H. Q. Zhang, D. Kahl, H. M. Jia, O. Sgouros, A. Guglielmetti, N. Toniolo, M. Nicoletto, A. Pakou, Francesca Soramel, P. Lotti, Takashi Teranishi, Y. Hirayama, G. Marquínez-Durán, M. La Commara, Ismael Martel, C. Signorini, T. Sava, S. C. Jeong, Cheng-Jian Lin, H. Ishiyama, A. Boiano, M. Mazzocco, J. P. Fernández-García, D. Pierroutsakou, D. Torresi, K. Rusek, T. Glodariu, A. M. Sánchez-Benítez, L. Stroe, Naohito Iwasa, C. Boiano, E. Strano, N. Keeley, Y. Sakaguchi, L. Yang, Taro Nakao, H. Yamaguchi, M. Mukai, J. Grebosz, N. Imai, and C. Parascandolo

Subjects
Physics, Elastic scattering, Condensed matter physics, Coulomb barrier
Published
2019

20. The $4\pi$4π highly-efficient light-charged-particle detector EUCLIDES, installed at the GALILEO array for in-beam $\gamma$γ-ray spectroscopy

Author

L. Grassi, A. Gadea, G. de Angelis, Roberto Menegazzo, D. Mengoni, P. Cocconi, M. Siciliano, A. Goasduff, J. J. Valiente-Dobón, D. Bazzacco, D. Testov, A. Boso, S. Lunardi, P. R. John, D. R. Napoli, Roberto Isocrate, G. Jaworski, K. Hadynska-Klek, F. J. Egea Canet, F. Recchia, C. Boiano, and J. A. Dueñas

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Spectrometer, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, 01 natural sciences, Charged particle, Particle detector, Semiconductor detector, Nuclear physics, 0103 physical sciences, Neutron, Gamma spectroscopy, Nuclear Experiment, 010306 general physics
Abstract

In a fusion-evaporation reaction, nuclei are produced by evaporating light-charged particles and neutrons from the compound nucleus. Typically, a nucleus of interest is produced as a result of a part of the total cross-section and, in order to guarantee a good channel discrimination, a particle detector, like the EUCLIDES $4\pi$ Si-ball array, is necessary. EUCLIDES has been quoted in more than a hundred publications resulting from many experiments performed in combination with the EUROBALL and GASP $\gamma$-ray spectrometers. The present paper reports on the upgraded version of EUCLIDES, that is presently coupled to the new GALILEO $\gamma$-ray spectrometer, installed at the Laboratori Nazionali di Legnaro, INFN. The design, characteristics and performance of the EUCLIDES array are presented and discussed.

Published
2019

21. Cross-section Measurement of the Cosmologically Relevant 7Be(n, α)4He Reaction over a Broad Energy Range in a Single Experiment

Author

G. L. Zhang, J. Mrazek, M. L. Sergi, R. Menegazzo, D. Piatti, S. Romano, Antonio Caciolli, H. da Silva, F. Galtarossa, Claudio Spitaleri, S. M. R. Puglia, A. Boiano, H. Yamaguchi, Carlo Broggini, Rosanna Depalo, G. G. Rapisarda, G. L. Guardo, F. Soramel, E. Strano, O. Sgouros, R. Sparta, Giuseppe D’Agata, A. Tumino, A. Pakou, V. Soukeras, R. G. Pizzone, D. Pierroutsakou, A. M. Sánchez-Benítez, Silvio Cherubini, Livio Lamia, M. Mazzocco, C. Boiano, C. Parascandolo, M. La Commara, D. Torresi, S. Hayakawa, M. Gulino, Carlos A. Bertulani, M. La Cognata, G. La Rana, I. Indelicato, Lamia, L., Mazzocco, M., Pizzone, R. G., Hayakawa, S., La Cognata, M., Spitaleri, C., Bertulani, C. A., Boiano, A., Boiano, C., Broggini, C., Caciolli, A., Cherubini, S., D'Agata, G., Da Silva, H., Depalo, R., Galtarossa, F., Guardo, G. L., Gulino, M., Indelicato, I., La Commara, M., La Rana, G., Menegazzo, R., Mrazek, J., Pakou, A., Parascandolo, C., Piatti, D., Pierroutsakou, D., Puglia, S. M. R., Romano, S., Rapisarda, G. G., Sanchez-Bentez, A. M., Sergi, M. L., Sgouros, O., Soramel, F., Soukeras, V., Sparta, R., Strano, E., Torresi, D., Tumino, A., Yamaguchi, H., and Zhang, G. L.

Subjects
Physics, 010504 meteorology & atmospheric sciences, abundances, Primordial nucleosynthesis, Library science, nucleosynthesis, Astronomy and Astrophysics, Nuclear Reaction, 01 natural sciences, Primordial Nucleosynthesis, Nuclear reactions, nucleosynthesis, abundances, Primordial nucleosynthesis, Abundance, Space and Planetary Science, 0103 physical sciences, Christian ministry, Abundances, Nuclear reactions, Nuclear Experiment, Nucleosynthesis, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Nuclear Reactions, Nucleosynthesi
Abstract

Studying interactions of radioactive ions with neutrons is particularly demanding and has been performed only in a few cases. Some of these interactions are crucial in several astrophysical contexts. In the present work, the case of the 7Be destruction induced by the (n, α) reaction is investigated at the energies typical of the primordial nucleosynthesis by means of the Trojan Horse Method applied to the 2H(7Be, αα)p quasi-free reaction. The 7Be(n, α)4He cross-section has been measured in a single experiment from ∼2 MeV down to cosmological energies. The corresponding deduced reaction rate has been adopted to evaluate the impact on big bang nucleosynthesis and on the lithium problem., This work has been partially supported by the Italian Ministry of the University under grant RBFR082838 and "LNS-Astrofisica Nucleare (fondi premiali)." J.M. and G.D'A. acknowledge MEYS, under the project SPIRAL2-CZ, EF16-013/0001679. C.A.B. acknowledges support from the U.S. NSF grant No 1415656 and the U.S. DOE grant No. DE-FG02-08ER41533. S.H. acknowledges "JSPS KAKENHI (grant No. 15K17631)."

Published
2019

22. SPECTROSCOPY OF NEUTRON-RICH C, O, N AND F ISOTOPES WITH THE AGATA plus PARIS plus VAMOS SETUP AT GANIL

Author

S. Ziliani, M. Ciemała, F. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, O. Dorvaux, S. Erturk, G. De France, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, B. Million, C. Müller-Gatermann, P. Napiorkowski, V. Nanal, M. Matejska-Minda, M. Rejmund, Ch. Schmitt, M. Stanoiu, I. Stefan, B. Wasilewska, M. Ziębliński, Fornal, Bogdan -- 0000-0002-1142-8067, Ciemala, Michal -- 0000-0001-5328-720X, [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Bracco, A. -- Bottoni, S. -- Camera, F.] Univ Milan, Milan, Italy -- [Ziliani, S. -- Crespi, F. -- Leoni, S. -- Benzoni, G. -- Bracco, A. -- Boiano, C. -- Bottoni, S. -- Brambilla, S. -- Camera, F. -- Million, B.] INFN, Sez Milano, Milan, Italy -- [Ciemala, M. -- Fornal, B. -- Maj, A. -- Bednarczyk, P. -- Cieplicka-Orynczak, N. -- Grebosz, J. -- Iskra, L. W. -- Kmiecik, M. -- Mazurek, K. -- Wasilewska, B.] Polish Acad Sci, Inst Nucl Phys, Krakow, Poland -- [Bast, M. -- Beckers, M. -- Braunroth, T. -- Goldkuhle, A. -- Mueller-Gatermann, C.] IKP Cologne, Cologne, Germany -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CEA, DSAM, GANIL, Caen, France -- [Clement, E. -- De France, G. -- Jacquot, B. -- Kim, Y. -- Lemasson, A. -- Li, H. -- Rejmund, M.] CNRS, IN2P3, Caen, France -- [Dorvaux, O. -- Schmitt, Ch] CNRS, IN2P3, IPHC UMR 7178, Strasbourg, France -- [Erturk, S.] Nigde Univ, Nigde, Turkey -- [Harakeh, M. N.] KVI Ctr Adv Radiat Technol, Groningen, Netherlands -- [Kicinska-Habior, M. -- Matea, I -- Stefan, I] Warsaw Univ, Fac Phys, Warsaw, Poland -- [Kicinska-Habior, M. -- Matea, I -- Stefan, I] IPN, Orsay Lab, Orsay, France -- [Michelagnoli, C.] ILL Grenoble, Grenoble, France -- [Napiorkowski, P. -- Matejska-Minda, M.] Univ Warsaw, Heavy Ion Lab, Warsaw, Poland -- [Nanal, V] Dept Nucl & Atom Phys, Mumbai, Maharashtra, India -- [Stanoiu, M.] IFIN HH, Bucharest, Romania -- [Zieblinski, M.] CEA, DRF, IRFU, Ctr CEA Saclay, Saclay, France, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, 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)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-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), 0-Belirlenecek, 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
Physics, Isotope, Spectrometer, 010308 nuclear & particles physics, General Physics and Astronomy, Context (language use), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, 0-Belirlenecek, Nuclear physics, Nuclear interaction, Ab initio quantum chemistry methods, 0103 physical sciences, Neutron, AGATA, Spectroscopy, Nuclear Experiment
Abstract

Zakopane Conference on Nuclear Physics - Extremes of the Nuclear Landscape -- AUG 26-SEP 02, 2018 -- Zakopane, POLAND, WOS: 000463866500052, Recent ab initio calculations pointed out the importance of the three-body terms of the nuclear interaction, in the description of the structure of n-rich systems. The state lifetimes in light n-rich carbon and oxygen nuclei have been predicted to be sensitive to the three-body terms and, in this context, an experiment, aiming at the measurement of these lifetimes, was performed in GANIL in July 2017 with the AGATA and PARIS arrays coupled to the VAMOS++ magnetic spectrometer. Details on the AGATA preliminary data analysis are presented., National Science Centre, Poland (NCN) [2013/08/M/ST2/00257, 2014/14/M/ST2/00738, 2016/22/M/ST2/00269], This work was supported by the National Science Centre, Poland (NCN) under contracts No. 2013/08/M/ST2/00257, 2014/14/M/ST2/00738 and 2016/22/M/ST2/00269.

Published
2019

23. The Cosmologically Relevant 7Be(n,α)4He Reaction in View of the Recent THM Investigations

Author

R. G. Pizzone, D. Piatti, D. Torresi, G. G. Rapisarda, C. Parascandolo, G. L. Guardo, H. Yamaguchi, V. Soukeras, L. Lamia, M. L. Sergi, A. Pakou, M. La Commara, A. Boiano, Rosanna Depalo, A. Tumino, M. La Cognata, E. Strano, Shigeru Kubono, M. Lattuada, G. L. Zhang, O. Sgouros, F. Soramel, Francesco L. Villante, Antonio Caciolli, D. Pierroutsakou, S. Hayakawa, M. Gulino, C. Boiano, M. Mazzocco, Carlo Broggini, G. La Rana, F. Galtarossa, C. Spitaleri, C. A. Bertulani, S. Romano, and Roberto Menegazzo

Subjects
Physics, Particle physics, Alpha (ethology)
Abstract

The cosmologically relevant \(^7\)Be(n,\(\alpha \))\(^4\)He has been matter of recent studies aimed at contributing to the long-standing Li-problem. Here a brief description of the twin THM investigations will be shown and the main results discussed.

Published
2019

24. Coherent coupled-reaction-channels analysis of existing and new p + Be 9 data between 1.7 and 15 MeV/nucleon

Author

Keeley, N. Pakou, A. Soukeras, V. Cappuzzello, F. Acosta, L. Agodi, C. Boiano, A. Calabrese, S. Carbone, D. Cavallaro, M. Deshmukh, N. Foti, A. Hacisalihoglu, A. La Commara, M. Martel, I. Mazzocco, M. Muoio, A. Parascandolo, C. Pierroutsakou, D. Rusek, K. Sanchez-Benitez, A.M. Santagati, G. Sgouros, O. Souliotis, G. Spatafora, A. Strano, E. Torresi, D. Trzcinska, A.

Subjects
Nuclear Experiment
Abstract

New data for the elastic scattering of Be9 from protons were obtained and analyzed together with data from the literature in a coherent coupled-reaction-channels approach. The new measurements were performed in inverse kinematics at 15, 22 and 51 MeV (1.67, 2.44, and 5.67 MeV/nucleon) by detecting the heavy ejectile in the MAGNEX spectrometer. This enabled an almost full angular distribution to be obtained, extending the results to forward angles where calculated values coincide and give the opportunity of proper normalization. Previous inconsistencies in absolute normalization between different data sets are removed. Standard collective model form factors fail to reproduce the inelastic scattering to the 2.43 MeV 5/2- state of Be9, suggesting that a more sophisticated approach based on the cluster structure of Be9 is required to describe this process. © 2019 American Physical Society.

Published
2019

25. Direct processes for the systems 7Be,8B + 208Pb at Coulomb barrier energies

Author

Y. Sakaguchi, P. Lotti, G. Marquínez-Durán, A. M. Sánchez-Benítez, H. M. Jia, A. Guglielmetti, H. Yamaguchi, T. Sava, M. Mazzocco, N. Toniolo, E. Strano, Y. H. Kim, J. Grebosz, Taro Nakao, O. Sgouros, L. Yang, M. Nicoletto, J. P. Fernández-García, K. Rusek, Efstathios Stiliaris, C. Boiano, D. Torresi, T. Glodariu, G. La Rana, A. Pakou, A. Boiano, N. Imai, C. Parascandolo, Hiroari Miyatake, L. Acosta, N. Keeley, Yusuke Wakabayashi, Francesca Soramel, Ismael Martel, A. Lagni, S. Kimura, M. La Commara, D. Kahl, D. Pierroutsakou, V. Soukeras, Hironobu Ishiyama, C. Signorini, H. Q. Zhang, Y. Y. Yang, Yoshikazu Hirayama, Shigeru Kubono, L. Stroe, Naohito Iwasa, Cheng-Jian Lin, C. Manea, M. Mukai, Takashi Teranishi, Y. X. Watanabe, Di Meo, S. C. Jeong, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Consejo Nacional de Ciencia y Tecnología (CONACYT). México LN-294537, DGAPA-PAPIIT IA103218, Mazzocco, M., Keeley, N., Boiano, A., Boiano, C., La Commara, M., Lagni, A., Manea, C., Parascandolo, C., Pierroutsakou, D., Signorini, C., Strano, E., Torresi, D., Yamaguchi, H., Kahl, D., Acosta, L., Meo, D., Fernandez-Garcia, J. P., Glodariu, T., Grebosz, J., Guglielmetti, A., Hirayama, Y., Imai, N., Ishiyama, H., Iwasa, N., Jeong, S. C., Jia, H. M., Kim, Y. H., Kimura, S., Kubono, S., Rana, G. L., Lin, C. J., Lotti, P., Marquinez-Duran, G., Martel, I., Miyatake, H., Mukai, M., Nakao, T., Nicoletto, M., Pakou, A., Rusek, K., Sakaguchi, Y., Sanchez-Benitez, A. M., Sava, T., Sgouros, O., Soukeras, V., Soramel, F., Stiliaris, E., Stroe, L., Teranishi, T., Toniolo, N., Wakabayashi, Y., Watanabe, Y. X., Yang, L., Yang, Y. Y., and Zhang, H. Q.

Subjects
Physics, History, Coulomb barrier, Energies, Computer Science Applications, Education, Nuclear physics, Work (electrical), Factory (object-oriented programming), Center (algebra and category theory), Christian ministry, Elastic scattering, Nuclear Experiment, Beam (structure)
Abstract

The elastic scattering process for the nuclear reactions induced by the Radioactive Ion Beams 7Be and 8B on a 208Pb target was measured for the first time in the energy range around the Coulomb barrier. Extensive theoretical calculations within the framework of the optical model were performed. An excellent agreement between experimental data and theoretical predictions was achieved for the reaction 7Be + 208Pb, while a comprehensive understanding of the reaction dynamics induced by the more exotic projectile 8B is still far to be reached. Predictions of the cross section for the breakup for both systems will also be given., The 8B experiment was performed at RI Beam Factory operated by RIKEN Nishina Center and CNS, University of Tokyo. This work was supported by the Polish National Science Centre under Contract No. 2014/14/M/ST2/00738 (COPIN-INFN Collaboration), by JSPS KAKENHI (Nos. 16K05369, and 19K03883) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan and by the projects: CONACyT LN-294537 and DGAPA-PAPIIT IA103218.

Published
2020

26. Architecture of the FARCOS detection system and first beam experiments

Author

Antonio Trifiro, S. Pirrone, S. De Luca, N. Giudice, Luis Acosta, E. V. Pagano, G. Salemi, F. Favela, M. D'Andrea, V. L. Sicari, Michele Papa, G. Passaro, Andrea Castoldi, Lucrezia Auditore, G. Sacca, L. Quattrocchi, C. Maiolino, G. Politi, T. Parsani, F. Librizzi, F. Fichera, D. Sciliberto, B. Gnoffo, C. Boiano, G. Cardella, G. Lanzalone, S. Maffessanti, E. De Filippo, N. S. Martorana, A. Grimaldi, P. Russotto, F. De Benedetti, F. Rizzo, A. Pagano, Fabio Previdi, M. Trimarchi, S. Norella, and Chiara Guazzoni

Subjects
Physics, Modularity (networks), sezele, Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Modular design, Scintillator, 01 natural sciences, Charged particle, 030218 nuclear medicine & medical imaging, law.invention, Telescope, 03 medical and health sciences, 0302 clinical medicine, Optics, law, 0103 physical sciences, Cluster (physics), business, Beam (structure)
Abstract

The FARCOS (Femtoscope ARray for Correlation and Spectroscopy) collaboration is finally going to instrument the first batch of 10-12 telescopes. They are capable of reconstructing the particle’s momentum with a high degree of precision and of performing correlation measurements of Light Charged Particles (LCPs) and of LCPs and Intermediate Mass Fragments thanks to the very good energy and angular and resolution. Each telescope features a sensitive area of 6.4 × 6.4 cm2 and is composed of three detection stages: two Si layers and a CsI(Tl) calorimeter. The FARCOS cluster modularity allows the arrangement in different configurations, depending on the physics case one wants to address. The final system will be a modular assembly of 20 telescopes. The total number of readout channels for the final FARCOS system is 2560 channels for the silicon layers and 80 channels for the scintillators. In this paper, we focus on the FARCOS basic module and system architecture and illustrate its performance as assessed in test beams in true experimental conditions.

Published
2018

27. 256 Channel Antialiasing Filter with Selectable Parameters and Differential Input to be Coupled with the GET Frontend Electronics: Design and Performance

Author

Chiara Guazzoni, T. Parsani, E. De Filippo, Andrea Castoldi, C. Boiano, F. Pinzin, and G. Cardella

Subjects
sezele, 010308 nuclear & particles physics, Computer science, Detector, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, 0103 physical sciences, Electronic engineering, Signal integrity, Electronics, Experimental methods, Electronic systems
Abstract

With the advent of radioactive beams there is a quest for developing novel experimental methods and instruments able to cope with beam characteristics to extract spectroscopic information and to study novel nuclear reaction mechanisms. The tendency is towards Digital Pulse Shape Acquisition since it allows one to fully profit of the information encoded in the detector output response. Even if the convenience of driving the signals over differential pairs to preserve signal integrity in noise environment when long cables are used is evident, there is a lack of digitizing electronics that features a differential input. To this aim we designed, build and qualified an antialiasing module that provides 256 channel antialiasing filter with selectable parameters and differential input to be coupled with the GET – Generic Electronic System for TPCs - backend electronics. The contribution focuses on the board design, layout and performance measured both as a standalone circuit and during on-beam experiments.

Published
2018

28. Determination of Lifetimes of Excited States in Neutron-rich $^{20}$O Isotope from Experiment with the AGATA+PARIS+VAMOS Setup

Author

M. Ciemała, S. Ziliani, F. Crespi, S. Leoni, B. Fornal, A. Maj, P. Bednarczyk, G. Benzoni, A. Bracco, C. Boiano, S. Bottoni, S. Brambilla, M. Bast, M. Beckers, T. Braunroth, F. Camera, N. Cieplicka-Oryńczak, E. Clément, O. Dorvaux, S. Ertürk, G. De France, A. Goldkuhle, J. Grębosz, M.N. Harakeh, Ł.W. Iskra, B. Jacquot, A. Karpov, M. Kicińska-Habior, Y. Kim, M. Kmiecik, A. Lemasson, H. Li, I. Matea, K. Mazurek, C. Michelagnoli, B. Millon, C. Müller-Gatermann, P. Napiorkowski, V. Nanal, M. Matejska-Minda, M. Rejmund, B. Sowicki, Ch. Schmitt, M. Stanoiu, I. Stefan, B. Wasilewska, M. Zielińska, M. Ziębliński, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, 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)-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), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Isotope, 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear physics, Excited state, 0103 physical sciences, AGATA, Neutron, Nuclear Experiment
Abstract

International audience; An experiment aiming at measuring lifetimes of the second 2+ excited states in neutron-rich C and O isotopes was recently performed at the GANIL laboratory, in France. In these nuclei, recent ab initio calculations provide a detailed description of the nuclear excited states, predicting a strong sensitivity of the electromagnetic transition probabilities to the details of the nucleon–nucleon interactions, especially in connection with the role played by the three-body (NNN) forces. Thus, the measurement of 2 + states lifetimes in this region will be a stringent test of the importance of including the NNN forces in describing the electromagnetic properties of selected nuclear states. This contribution reports on the status of the experimental analysis for the case of lifetimes in 20O.

Published
2018

29. Towards the lowest-energy limit for light ions identification with silicon pixel-type detectors

Author

S. Brambilla, F. C. L. Crespi, B. Fornal, S. Capra, G. Bocchi, C. Boiano, G. Jaworski, N. Cieplicka-Oryńczak, M. Siciliano, M. Ciemala, K. Hadynska-Klek, J. J. Valiente-Dobón, D. Mengoni, D. Bazzacco, Ł. W. Iskra, P. R. John, J.A. Dueñas, G. Benzoni, Alain Goasduff, S. Leoni, F. Recchia, and D. Testov

Subjects
Physics, Nuclear and High Energy Physics, Silicon, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, Alpha particle, Kinetic energy, 01 natural sciences, Particle identification, Ion, Nuclear physics, chemistry, 0103 physical sciences, Nuclear fusion, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

An in-beam test of two pixel-type silicon detectors of the TRACE detector project has been performed at Laboratori Nazionali di Legnaro (Italy). The aim was to investigate the lowest kinetic energy values at which isotopic identification of heavy-ion reactions products with mass $ A\sim 10$ is possible, by using a single-layer silicon detector. Two separate read-out chains, analog and digital, were used, and the Pulse Shape Analysis technique was employed to obtain the particle identification matrices for the digitally processed data. The results confirmed the high capability of the Pulse Shape Analysis method which can be used for light ion identification, with performances similar to the analog approach. Separation in both charge and mass was obtained for Li and Be isotopes, however, the presence of a significant background from alpha particles severely limited the data analysis in the lower energy region. Due to this effect, the identification of the light products (7, 6Li isotopes) could be possible down to $ \sim 24.5$ MeV only, while the 9, 7Be isotopes were separable down to $ \sim 29$ MeV. This gives the value of $ < 4$ MeV/nucleon as the lowest kinetic energy for light products identification by using the pixel-type detectors of the TRACE project, in the present experimental conditions.

Published
2018

30. Reaction Dynamics for the Systems 7Be, 8B + 208Pb at Coulomb Barrier Energies

Author

S. Kimura, Cheng-Jian Lin, S. C. Jeong, N. Keeley, Y. H. Kim, N. Imai, C. Parascandolo, A. Boiano, L. Stroe, Shigeru Kubono, Yoshikazu Hirayama, C. Manea, Y. Sakaguchi, Luis Acosta, V. Soukeras, O. Sgouros, J. Grebosz, L. Yang, N. Toniolo, Y. Y. Yang, A. Pakou, D. Kahl, Hironobu Ishiyama, Naohito Iwasa, G. Marquínez-Durán, Y. X. Watanabe, Francesca Soramel, M. La Commara, D. Pierroutsakou, P. Di Meo, C. Signorini, Takashi Teranishi, T. Sava, A. Guglielmetti, J. A. Lay, M. Mazzocco, H. Yamaguchi, Yusuke Wakabayashi, C. Boiano, M. Mukai, Hiroari Miyatake, K. Rusek, T. Glodariu, H. M. Jia, A. M. Sánchez-Benítez, E. Strano, Ismael Martel, D. Torresi, J. P. Fernández-García, Efstathios Stiliaris, Taro Nakao, and M. Nicoletto

Subjects
Physics, History, Reaction dynamics, Coulomb barrier, Molecular physics, Computer Science Applications, Education
Abstract

In this contribution we describe the first results obtained for the investigation of the elastic scattering process in the reactions induced by the Radioactive Ion Beams 7Be and 8B on a 208Pb target at Coulomb barrier energies. The experimental data were analyzed within the framework of the optical model in order to extract the total reaction cross section. The comparison with data available in literature for reactions induced on 208Pb by light ions in the mass range A = 6-8 shows that the loosely-bound 8B has the largest reactivity.

Published
2018

31. Recent Developments and Perspectives in Nuclear Structure by γ and Particle Spectroscopy

Author

S. Bottoni, C. Boiano, A. Bracco, O. Wieland, Alberto Pullia, Stefano Riboldi, G. Benzoni, B. Million, E. Vigezzi, A. Guglielmetti, Pier Francesco Bortignon, S. Leoni, Gianluca Colò, S. Capra, S. Brambilla, F. Camera, B. Blasi, A. Mentana, and F. C. L. Crespi

Subjects
Physics, Nuclear physics, Thermonuclear fusion, Atomic nucleus, Nuclear astrophysics, Nuclear structure, AGATA, Neutron, Scintillator, Tracking (particle physics)
Abstract

Advances in nuclear structures studies of neutron-rich systems are presented, focusing on experimental activities based on γ and particle spectroscopy—ideal probes of the multifaceted nature of the atomic nucleus. Emphasis is given to recent highlights obtained in world’s leading laboratories, in Europe and Japan, by large international collaborations in which the Nuclear Physics group of Milano University has played a key role. In particular, experiments are described taking advantage of both stable and radioactive ion beams, as well as intense neutron beams. They require the use of the most advanced detection setups, such as the European array AGATA, based on γ-ray tracking techniques, and also arrays of large size scintillators. Measurements of cross sections of thermonuclear fusion reactions at astrophysically relevant energies, performed by the LUNA collaboration, are also briefly discussed. Finally, research and developments of detectors based on novel scintillators materials are presented, being a significant part of the activity carried out at the Milano Physics Department.

Published
2018

32. Investigation on gamma-ray position sensitivity at 662 keV in a spectroscopic 3' x 3' LaBr3:Ce scintillator

Author

A. Giaz, B. Million, Stefano Riboldi, S. Brambilla, Simone Coelli, A. Marone, F. Camera, O. Wieland, F. Birocchi, Carlo Fiorini, C. Boiano, and N. Blasi

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Doppler broadening, Imaging, LaBr3:Ce scintillators, Position sensitivity, Instrumentation, sezele, business.industry, Detector, Gamma ray, Scintillator, Collimated light, Crystal, Full width at half maximum, Optics, Position (vector), business
Abstract

The position sensitivity of a thick, cylindrical and continuous 3” x 3” (7.62 cm x 7.62 cm) LaBr3:Ce crystal was studied using a 1 mm collimated beam of 662 keV gamma rays from a 400 MBq intense 137Cs source and a spectroscopic photomultiplier (PMT) (HAMAMATSU R6233-100SEL). The PMT entrance window was covered by black absorber except for a small window 1 cm x 1 cm wide. A complete scan of the detector over a 0.5 cm step grid was performed for three positions of the 1 cm x 1 cm window. For each configuration the energy spectrum was measured and the peak centroid, the FWHM, the area and peak asymmetry of the 662 keV gamma transition were analyzed. The data show that, even in a 3” thick LaBr3:Ce crystal with diffusive surfaces the position of the full energy peak centroid depends on the source position. We verified that, on average, the position of the full energy peak centroids measured in the three 1 cm x 1 cm window configurations is sufficient for the correct identification of the collimated gamma source position.

Published
2015

33. Evidence for O15+α resonance structures in Ne19 via direct measurement

Author

D. Mengoni, Mile Zadro, J. Grebosz, S. Bailey, R.G. Pizzone, Claudio Spitaleri, M. La Cognata, A. Boiano, D. Pierroutsakou, Manuela Cavallaro, M. Mazzocco, C. Stefanini, T. Glodariu, P. Figuera, C. Wheldon, N. Curtis, C. Parascandolo, M. La Commara, J P Garcia Fernandez, Tz. Kokalova, A. Di Pietro, C. Signorini, L. Stroe, E. Strano, Maria Fisichella, M. Lattuada, D. Torresi, Silvio Cherubini, and C. Boiano

Subjects
Physics, Energy loss, Spins, 010308 nuclear & particles physics, Branching fraction, High resolution, 01 natural sciences, Resonant scattering, Ion, 0103 physical sciences, Cluster (physics), Atomic physics, 010306 general physics, Radioactive beam
Abstract

States in the astrophysically important $^{19}\mathrm{Ne}$ nucleus have been populated directly using the $^{15}\mathrm{O}(\ensuremath{\alpha},\phantom{\rule{0.16em}{0ex}}\ensuremath{\alpha})^{15}\mathrm{O}$ reaction with a radioactive $^{15}\mathrm{O}$ beam. Due to the challenges involved, this represents the first such $^{15}\mathrm{O}$ measurement with high resolution and the first dedicated to exploring the cluster structure. This measurement comprises three experiments: the first to develop the $^{15}\mathrm{O}$ radioactive beam, the second the resonant scattering study, and the third to measure the precise energy loss of O ions in $^{4}\mathrm{He}$ to reduce systematic uncertainties. The results show evidence for $^{15}\mathrm{O}+\ensuremath{\alpha}$ cluster structure which could explain earlier results pointing to the increased $\ensuremath{\alpha}$ branching ratio in the astrophysical reaction rate for high-spin near-threshold resonances. Absolute differential cross sections have been measured. Additionally, spins, parities, and partial decay widths, essential for nuclear reaction-rate calculations, have been extracted using an $R$-matrix analysis.

Published
2017

34. Elastic scattering of Be7+Si28 at near-barrier energies

Author

I. Strojek, E. Strano, A. Boiano, C. Stefanini, Daniele Carbone, L. Acosta, Efstathios Stiliaris, C. Manea, Manuela Cavallaro, Ch. Betsou, M. Mazzocco, N. G. Nicolis, V. Soukeras, G. Marquínez-Durán, X. Aslanoglou, F. Soramel, A. Pakou, C. Parascandolo, M. La Commara, K. Rusek, Ismael Martel, C. Signorini, D. Torresi, J. Grebosz, A. M. Sánchez-Benítez, N. Keeley, O. Sgouros, C. Boiano, and D. Pierroutsakou

Subjects
Physics, Elastic scattering, Phonon scattering, Condensed matter physics, 010308 nuclear & particles physics, 0103 physical sciences, media_common.cataloged_instance, Inelastic scattering, European union, 010306 general physics, 01 natural sciences, media_common
Abstract

This research was partially funded by the European Union Seventh Framework Programme FP7/2007-2013 under Grant No. 262010-ENSAR

Published
2017

35. 256-channel differential to single ended antialiasing filter for pulse shape analysis in nuclear physics experiments

Author

Andrea Castoldi, Chiara Guazzoni, G. Sacca, P. Chang, T. Parsani, G. Cardella, and C. Boiano

Subjects
Physics, Offset (computer science), Input offset voltage, 010308 nuclear & particles physics, Detector, Input impedance, Filter (signal processing), Topology, 01 natural sciences, Cutoff frequency, 030218 nuclear medicine & medical imaging, law.invention, 03 medical and health sciences, 0302 clinical medicine, law, 0103 physical sciences, Operational amplifier, Communication channel
Abstract

In view of the first application in the framework of the FARCOS project, we designed a compact 6U board that provides in a single module 256 channels featuring: i) differential to single-ended low-noise conversion with $100 \Omega $ input impedance, ii) a second order or a fourth order anti-aliasing filter, iii) a selectable output offset voltage. The first stage is responsible of the conversion from the differential mode to single-ended and features an additional input for offset regulation. The second stage is the filtering stage, designed as a Sallen-Key cell with cutoff frequency of 40 MHz. The design relies on very small case dual operational amplifiers and clusters 4 channels in a common design sharing the offset regulation section. The 4-channel cluster occupies an area of 3.5 mm $\times 110$ mm. The paper illustrates the designed module topology and the results of the characterization of a 4-channel cluster.

Published
2017

36. Present status of the FARCOS detection system

Author

S. Pirrone, Chiara Guazzoni, Luis Acosta, L. Quattrocchi, G. Passaro, G. Salemi, G. Lanzalone, G. Cardella, F. Rizzo, G. Sacca, B. Gnoffo, A. Grimaldi, E. V. Pagano, N. Giudice, Andrea Castoldi, Lucrezia Auditore, E. De Filippo, N. S. Martorana, F. Favela, P. Russotto, T. Parsani, G. Politi, S. Norella, S. De Luca, C. Boiano, F. Librizzi, M. D'Andrea, C. Maiolino, S. Maffessanti, F. Fichera, D. Sciliberto, Michele Papa, A. Trifirò, A. Pagano, Fabio Previdi, and M. Trimarchi

Subjects
Nuclear and High Energy Physics, Preamplifier, STRIPS, Scintillator, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, Telescope, 03 medical and health sciences, 0302 clinical medicine, Optics, Settore ING-INF/04 - Automatica, law, Nuclear Medicine and Imaging, 0103 physical sciences, Instrumentation, Radiology, Nuclear Medicine and Imaging, detectors, Physics, Calorimeter (particle physics), 010308 nuclear & particles physics, business.industry, Nuclear science, Attenuation length, Instrumentation, Radiology, Nuclear Medicine and Imaging, Nuclear and High Energy Physics, Full width at half maximum, business, Radiology, Energy (signal processing)
Abstract

Few years ago we proposed a novel detection system textbf- named FARCOS (Femtoscopy ARray for COrrelations andSpectroscopy) – to target different open cases in nuclear physics. The basic cluster unit of the FARCOS array is a telescope structure with an active area of $6.4 \times 6.4$ cm$^{\mathbf {2}}$ composed of three detection stages. The first two detection layers are DC-coupled Double-Sided Silicon Strip Detectors (DSSSDs), 300 $\mu \textbf{m}$ thick and 1500 $\mu \textbf{m}$ thick, featuring $32 \times 32$ orthogonal strips. The third stage, acting as calorimeter, is composed of four truncated pyramids of CsI(Tl) crystals with an active area of $3.2 \times 3.2$ cm$^{\mathbf {2\, }}$textbfand an absorption length of 6 cm arranged in window configuration. The final system will be a modular assembly of 20 telescopes.A key feature of FARCOS is the identification of the particles stopping even in the first detection layer, relying on pulse shape analysis techniques. The FARCOS frontend electronics features a full scale energy range up to 2 GeV with 5 different selectable ranges and an energy resolution down to 10 keV FWHM with a power budget of about 10 mW/channel in the case of the lower full scale energy range. Its core is a custom multichannel charge preamplifier VLSI chip.The system performance has been extensively qualified on few workhorses in view of the assembly of the final telescopes foreseen for 2018.

Published
2017

37. Reaction dynamics studies for the system7Be +208Pb at Coulomb barrier energies

Author

M. Nicoletto, Ismael Martel, E. Strano, A. Pakou, J. P. Fernández-García, Francesca Soramel, P. Di Meo, A. Guglielmetti, J. Grebosz, C. Signorini, M. Mazzocco, A. M. Sánchez-Benítez, L. Acosta, A. Boiano, C. Manea, G. Marquínez-Durán, T. Sava, C. Parascandolo, M. La Commara, D. Torresi, C. Boiano, T. Glodariu, V. Soukeras, L. Stroe, O. Sgouros, D. Pierroutsakou, and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear

Subjects
Ion beam, 010308 nuclear & particles physics, Chemistry, Projectile, Physics, QC1-999, Isotopes of lithium, Coulomb barrier, Scattering process, 01 natural sciences, Reaction dynamics, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Isotopes of helium
Abstract

The scattering process of the Radioactive Ion Beam 7 Be from a 208 Pb target was measured at three near-barrier energies. The quasi-elastic angular distributions were analyzed within the framework of the optical model to extract the reaction cross sections. The results are compared with those obtained for the reactions induced by the mirror projectile 7 Li and by the lightest particle-stable lithium isotope 6 Li on the same target. The angular distributions for the production of the two 7 Be constituent clusters, namely 3 He and 4 He, were also measured. In agreement with what observed for the interaction of 7 Be with lighter targets, the production of the heavier helium isotope resulted to be much more abundant than that of its lighter counterpart.

Published
2017

38. Oxygen-15+α resonant elastic scattering to study cluster states in19Ne

Author

D. Torresi, C. Wheldon, C. Boiano, Tz. Kokalova, G. Pizzone, L. Stroe, C. Signorini, M. La Cognata, S. Bailey, A. Boiano, M. La Commara, J. P. Fernández García, J. Grebosz, M. Mazzocco, A. Di Pietro, C. Stefanini, C. Spitaleri, D. Mengoni, M. Cavallaro, D. Pierroutsakou, M. Lattuada, E. Strano, C. Parascandolo, Maria Fisichella, S. Cherubini, Mile Zadro, T. Glodariu, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, and European Union (UE). H2020

Subjects
Excitation function, Physics, Elastic scattering, History, 010308 nuclear & particles physics, Scattering, Inverse, Kinematics, 01 natural sciences, Small-angle neutron scattering, Computer Science Applications, Education, 0103 physical sciences, Cluster (physics), Atomic physics, 010306 general physics, elastic scattering excitation function, Excitation
Abstract

The elastic scattering excitation function for 15O on 4He was measured - for the first time - by using the Inverse Kinematic Thick Target scattering method. The obtained spectrum was analysed in an R-matrix framework providing spectroscopic information for several states in the excitation energy of the nucleus 19Ne from 4.8 to 9 MeV. Eight of them are newly observed states. The set-up and the experimental technique will be described in detail and the results will be shown and discussed. European Unions Horizon 2020 659744

Published
2017

39. Elastic scattering of Be 7 + Si 28 at near-barrier energies

Author

Sgouros, O. Pakou, A. Pierroutsakou, D. Mazzocco, M. Acosta, L. Aslanoglou, X. Betsou, C. Boiano, A. Boiano, C. Carbone, D. Cavallaro, M. Grebosz, J. Keeley, N. La Commara, M. Manea, C. Marquínez-Durán, G. Martel, I. Nicolis, N.G. Parascandolo, C. Rusek, K. Sánchez-Benítez, A.M. Signorini, C. Soramel, F. Soukeras, V. Stefanini, C. Stiliaris, E. Strano, E. Strojek, I. Torresi, D.

Abstract

The elastic scattering of the radioactive nucleus Be7 from a Si28 target was studied at four near-barrier energies: 13.2, 17.2, 19.8, and 22.0 MeV (E/VC=1.14, 1.48, 1.71, and 1.90). Angular distribution measurements were performed at each energy with the multidetector array EXPADES in conjunction with two Parallel-Plate Avalanche Counters (PPAC) to enable beam ray reconstruction of the events. The data are analyzed in a double-folding framework and the energy evolution of the optical potential as well as the total reaction cross sections are deduced and discussed. © 2017 American Physical Society.

Published
2017

40. 8 B + 208 Pb Elastic Scattering at Coulomb Barrier Energies

Author

C. Manea, L. Yang, M. Mazzocco, Shigeru Kubono, C. Parascandolo, Y. Sakaguchi, C. Boiano, M. Nicoletto, Youhua Yang, C. Signorini, Yasuo Wakabayashi, Hui-Ming Jia, A. Boiano, D. Kahl, D. Torresi, M. Mukai, Taro Nakao, J. Grebosz, D. Pierroutsakou, Hiroari Miyatake, Naohito Iwasa, Nobuaki Imai, M. La Commara, Cheng-Jian Lin, H. Yamaguchi, Yutaka Watanabe, S. Kimura, Takashi Teranishi, H. Ishiyama, Yoshikazu Hirayama, A. M. Sánchez-Benítez, Yongho Kim, P. Di Meo, S. C. Jeong, F. Soramel, and Emanuele Strano

Subjects
Elastic scattering, Physics, History, Range (particle radiation), Ion beam, 010308 nuclear & particles physics, Scattering, QC1-999, Coulomb barrier, Mott scattering, 01 natural sciences, Energies, Computer Science Applications, Education, Ion, Coulomb Barrier, Cross section (physics), Reaction dynamics, 0103 physical sciences, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

The scattering process of weakly-bound nuclei at Coulomb barrier energies provides deep insights on the reaction dynamics induced by exotic nuclei. Within this framework, we measured for the first time the scattering process of the short-lived Radioactive Ion Beam (RIB) 8B (Sp = 0.1375 MeV) from a 208Pb target at 50 MeV beam energy. The 8B RIB was produced by means of the in-flight facility CRIB (RIKEN, Japan) with an average intensity on target of 10 kHz and a purity about 25%. Elastically scattering ions were detected in the angular range θc.m. = 10 ◦ -160 ◦ by means of the detector array EXPADES. A preliminary optical model analysis indicates a total reaction cross section of about 1 b, a value, once reduced, 2-3 times larger than those obtained for the reactions induced by the stable weakly-bound projectiles 6,7Li on a 208Pb target in the energy range around the Coulomb barrier.

Published
2017

41. Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O

Author

A. Pullia, J. Eberth, Sunniva Siem, D. R. Napoli, N. Karkour, S. Lunardi, A. Giaz, D. S. Judson, K. Mazurek, Elena Litvinova, A. Gottardo, P. Molini, Roman Gernhäuser, F. Recchia, S. Ceruti, Begoña Quintana, R. Avigo, D. Bazzacco, R. Nicolini, P. Bednarczyk, Roberto Menegazzo, M. Kmiecik, D. Mengoni, A. Bracco, S. Brambilla, P. A. Söderström, L. Charles, M. Zieblinski, P. Désesquelles, A. I. Morales, Marco Bellato, J. Grebosz, G. Benzoni, Luna Pellegri, O. Wieland, B. Birkenbach, J. Simpson, C. Michelagnoli, O. Stezowski, C. A. Ur, Bo Cederwall, S. Leoni, M.D. Salsac, G. de Angelis, A. Maj, E. Farnea, Ch. Theisen, J. J. Valiente Dobon, Roberto Isocrate, C. Boiano, Herbert Hess, M. Krzysiek, F. Camera, M. Ciemala, Andreas Görgen, S. Bottoni, E. G. Lanza, N. Blasi, B. Siebeck, F. C. L. Crespi, A. Gadea, D. Bortolato, P. Reiter, V. Vandone, B. Million, J. Jolie, A. Jungclaus, and SCOAP

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Isoscalar, Gamma ray, Inelastic scattering, 01 natural sciences, 7. Clean energy, Resonance (particle physics), lcsh:QC1-999, Isospin character, Low-lying electric dipole excitations, Ion, Nuclear physics, Dipole, Low-lying electric dipole excitations 124Sn, 0103 physical sciences, AGATA, Atomic physics, 010306 general physics, 124Sn, lcsh:Physics
Abstract

L. Pellegri et al. ; 5 pags. ; 6 figs. ; open access article under the CC BY license. Funded by SCOAP3, © 2014 The Authors. The γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented δE-E silicon telescopes. The angular distribution was measured both for the γ rays and the scattered 17O ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (γ, γ') and (α, α'γ) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1- excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density., Grant No. 2011/03/B/ST2/01894; (iii) the National Superconducting Cyclotron Laboratory at MSU; (iv) the US NSF Grant PHY-1204486; and the German BMBF under Grant 06KY9136.

Published
2014
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42. SiPM optical modules for the Schwarzschild-Couder Medium Size Telescopes proposed for the CTA observatory

Author

M. Ambrosio, L. Consiglio, Maria Ionica, A. Rugliancich, M. Bitossi, Riccardo Paoletti, F. Liciulli, S. Loporchio, L. Di Venere, M. Valentino, C. Bonavolontà, E. Fiandrini, V. Masone, Elisabetta Bissaldi, Nicola Giglietto, Carla Aramo, Francesco Giordano, M. Caprai, L. Tosti, V. Vagelli, Giovanni Ambrosi, B. Bertucci, and C. Boiano

Subjects
Physics, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Cherenkov Telescope Array, law.invention, Telescope, Wavelength, Upgrade, Silicon photomultiplier, Optics, Observatory, law, Astrophysics::Solar and Stellar Astrophysics, business, Schwarzschild radius, Cherenkov radiation
Abstract

Silicon Photomultipliers (SiPMs) are excellent devices to detect the faint and short Cherenkov light emitted in high energy atmospheric showers, and therefore suitable for use in imaging air Cherenkov Telescopes. The high density Near Ultraviolet Violet SiPMs (NUV-HD3) produced by Fondazione Bruno Kessler (FBK) in collaboration with INFN were used to equip optical modules for a possible upgrade of the Schwarzschild-Couder Telescope camera prototype, in the framework of the Cherenkov Telescope Array project. SiPMs are 6×6 mm2 devices based on 40×40 μm2 microcells optimized for photo-detection at the NUV wavelengths. More than 40 optical modules, each composed by a 4×4 array of SiPMs, were assembled. In this contribution we report on the development and on the assembly of the optical modules, their validation and integration in the camera.

Published
2019

43. The high granularity and large solid angle detection array EXPADES

Author

G. Pontoriere, L. Roscilli, D. Pierroutsakou, P. Molini, F. Soramel, L. Stroe, M. Nicoletto, C. Boiano, A. Boiano, P.G. Zatti, A. Guglielmetti, J. Grebosz, G. Galet, C. Signorini, P. Di Meo, M. Mazzocco, L. Parascandolo, C. Cassese, M. Bettini, E. Strano, C. Parascandolo, C. Manea, N. Toniolo, M. La Commara, M. Tessaro, D. Torresi, L. Castellani, T. Glodariu, D. Corti, and A. Anastasio

Subjects
Nuclear and High Energy Physics, Silicon Strip Detectors, Silicon, Alpha sources, High granularity, chemistry.chemical_element, E region, STRIPS, law.invention, Optics, Application-specific integrated circuit, law, Ionization, Offline test, ASIC electronics, Radioactive ion beams, Instrumentation, Exotic particles, Physics, Pixel, Ionization chambers, business.industry, Detector, Solid angle, Detector arrays, Alpha sources, ASIC electronics, Detector arrays, Exotic particles, High granularity, Offline test, Radioactive ion beams, Silicon Strip Detectors, E region, Telescopes, chemistry, business, Beam (structure), Telescopes
Abstract

The EXPADES (EXotic PArticle DEtection System) detector array consists of 16 Double Side Silicon Strip Detectors (DSSSD) with active areas of 64 × 64 mm 2 , arranged in 8 ΔE (40/50 μm)–E (300 μm) telescopes. All detector faces are segmented into 32 × 2-mm wide strips, ensuring a 2 × 2 mm 2 pixel configuration. Eight ionization chambers can be alternatively used as ΔE stages or, if needed, as an additional third layer for more complex triple telescopes. The signals from silicon ΔE layers and from ionization chambers are read by standard electronics, while innovative 32-channel ASIC chips are employed for the readout of the E stages. The results of off-line tests with alpha sources and from the first in-beam experiment with a 17 O beam are presented.

Published
2013

44. Pulse-shape discrimination in NE213 liquid scintillator detectors

Author

S. Tropea, M. Assié, A. Foti, Daniele Carbone, Manuela Cavallaro, F. Azaiez, C. Boiano, M. De Napoli, N. de Séréville, C. Agodi, Roberto Linares, D. Nicolosi, J. A. Scarpaci, Francesco Cappuzzello, M. Bondì, 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 de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM)

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Gaussian, Barium fluoride, Detector, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Scintillator, 01 natural sciences, symbols.namesake, chemistry.chemical_compound, Optics, chemistry, 0103 physical sciences, Wide dynamic range, symbols, Neutron detection, Neutron, 010306 general physics, business, Instrumentation, Energy (signal processing)
Abstract

The 16-channel fast stretcher BaFPro module, originally developed for processing signals of Barium Fluoride scintillators, has been modified to make a high performing analog pulse-shape analysis of signals from the NE213 liquid scintillators of the EDEN neutron detector array. The module produces two Gaussian signals, whose amplitudes are proportional to the height of the fast component of the output light and to the total energy deposited into the scintillator, respectively. An in-beam test has been performed at INFN-LNS (Italy) demonstrating a low detection threshold, a good pulse-shape discrimination even at low energies and a wide dynamic range for the measurement of the neutrons energy.

Published
2013

45. α and He3 production in the Be7+Si28 reaction at near-barrier energies: Direct versus compound-nucleus mechanisms

Author

G. Marquínez-Durán, F. Soramel, N. Keeley, C. Manea, M. Mazzocco, N. G. Nicolis, Ismael Martel, Daniele Carbone, C. Parascandolo, M. La Commara, V. Soukeras, A. Boiano, C. Boiano, C. Signorini, J. Grebosz, A. Pakou, D. Torresi, O. Sgouros, C. Stefanini, Efstathios Stiliaris, L. Acosta, I. Strojek, D. Pierroutsakou, Manuela Cavallaro, Ch. Betsou, E. Strano, X. Aslanoglou, K. Rusek, and A. M. Sánchez-Benítez

Subjects
Physics, 010308 nuclear & particles physics, 01 natural sciences, Angular distribution, medicine.anatomical_structure, 0103 physical sciences, medicine, Direct reaction, Mirror nuclei, Born approximation, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleus
Abstract

The production of $\ensuremath{\alpha}$ and $^{3}\mathrm{He}$ particles, the cluster constituents of $^{7}\mathrm{Be}$, in the $^{7}\mathrm{Be}+\phantom{\rule{0.16em}{0ex}}^{28}\mathrm{Si}$ reaction was studied at three near-barrier energies, namely 13, 20, and 22 MeV. Angular distribution measurements were performed at each energy, and the data were analyzed in both statistical model and Distorted-Wave Born Approximation (DWBA) frameworks in order to disentangle the degree of competition between direct and compound channels. The energy evolution of the ratio of direct to total reaction cross section was mapped in comparison with similar data for $^{6}\mathrm{Li}$ and $^{7}\mathrm{Li}$ projectiles on a $^{28}\mathrm{Si}$ target. The results indicate larger transfer contributions for collisions involving the mirror nuclei $^{7}\mathrm{Be}$ and $^{7}\mathrm{Li}$ than in the $^{6}\mathrm{Li}$ case. Fusion cross sections were deduced, taking into account the $\ensuremath{\alpha}$-particle cross sections due to compound-nucleus formation and particle multiplicities deduced from our statistical model framework. It was found that fusion is compatible with systematics and single-barrier penetration cross sections to within an uncertainty band of 10% to 20%. Indications of fusion hindrance for $^{7}\mathrm{Li}$ and $^{7}\mathrm{Be}$ compared to $^{6}\mathrm{Li}$, starting from the barrier and below it, are given. This hindrance is attributed to the existence of large transfer channels. Furthermore, the experimental results, analyzed in the DWBA framework, suggest $^{3}\mathrm{He}$ and $^{4}\mathrm{He}$ transfer as the dominant direct reaction mechanism.

Published
2016

46. O17+Ni58scattering and reaction dynamics around the Coulomb barrier

Author

O. Sgouros, C. Manea, A. Boiano, N. Toniolo, Francesca Soramel, D. Pierroutsakou, A. Pakou, C. Signorini, C. Boiano, J. Grebosz, Pietro Benedetto Molini, C. Parascandolo, P. Di Meo, M. La Commara, A. Gheorghe, V. Soukeras, K. Rusek, Emanuele Strano, Y. X. Watanabe, S. C. Jeong, L. Stroe, Andrea Vitturi, M. Nicoletto, Y.H. Kim, J. A. Lay, K. Zerva, D. M. Filipescu, Hiroari Miyatake, D. Torresi, N. Keeley, A. Guglielmetti, M. Mazzocco, and T. Glodariu

Subjects
Physics, Elastic scattering, 010308 nuclear & particles physics, Binding energy, Order (ring theory), Coulomb barrier, Inelastic scattering, 01 natural sciences, Spectral line, Reaction dynamics, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract

This work aims at investigating the projectile binding energy influence on the reaction dynamics, introducing new results and new data analysis methods in order to overcome some typically encountered problems, such as the identification of reaction products differing by few mass units and the discrimination of direct reaction processes. The $^{17}\mathrm{O}+^{58}\mathrm{Ni}$ collision was studied at five near-barrier energies employing a compact experimental setup consisting of four double-sided silicon strip detectors (DSSSDs). Different reaction processes, namely the elastic and inelastic scattering and the $1n$ stripping, were discriminated by means of a detailed analysis of the experimental energy spectra based on Monte Carlo simulations. The elastic scattering angular distributions were investigated within the framework of the optical model using Woods-Saxon and double-folding potentials. The total reaction cross sections were extracted and the reduced cross sections compared with those obtained for $^{17}\mathrm{F}$ (${S}_{p}=0.600$ MeV), the mirror nucleus of $^{17}\mathrm{O}$ (${S}_{n}=4.143$ MeV), and for the tightly bound $^{16}\mathrm{O}$ projectile. The $^{17}\mathrm{O}+^{58}\mathrm{Ni}$ total reaction cross sections were larger than those for $^{16}\mathrm{O}$ on the same target at the lowest energies studied, becoming identical, within errors, as the incident energy increased above the Coulomb barrier. This behavior was related to a strong contribution from the $1n$-stripping channel at the lowest energies.

Published
2016

47. ASY-EOS experiment at GSI: investigating the symmetry enenrgy at supra-satutation densities

Author

P. Russotto, M. Chartier, M. D. Cozma, E. De Filippo, A. Le Fevre, S. Gannon, A. Gašsparić, M. Kiš, S. Kupny, Y. Leifels, R. Lemmon, Q. Li, J. Lukasik, P. Marini, P. Pawlowski, S. Santoro, W. Trautmann, M. Veselsky, L. Acosta, M. Adamczyk, A. Al Ajlan, M. Al Garawi, S. Al Homaidhi, F. Amorini, L. Auditore, T. Aumann, Y. Ayyad, V. Baran, Z. Basrak, R. Bassini, J. Benlliure, C. Boiano, C. Boisjoli, K. Boretzky, J. Brzychczyk, A. Budzanowski, G. Cardella, P. Cammarata, Z. Chajecki, A. Chbihi, M. Colonna, B. Czech, M. Di Toro, M. Famiano, V. Greco, L. Grassi, C. Guazzoni, P. Guazzoni, M. Heil, L. Heilborn, R. Introzzi, T. Isobe, K. Kezzar, A. Krasznahorskay, N. Kurz, E. La Guidara, G. Lanzalone, P. Lasko, W. G. Lynch, Z. Matthews, L. May, T. Minniti, M. Mostazo, A. Pagano, M. Papa, S. Pirrone, R. Pleskac, G. Politi, F. Porto, R. Reifarth, W. Reisdorf, F. Riccio, F. Rizzo, D. Rossi, H. Simon, I. Skwirczynska, Z. Sosin, L. Stuhl, A. Trifirò, M. Trimarchi, M. B. Tsang, G. Verde, A. Wieloch, P. Wigg, H. H. Wolter, P. Wu, S. Yennello, P. Zambon, L. Zetta, M. Zoric, LOMBARDO, IVANO, ROSATO, ELIO, VIGILANTE, MARIANO, S. Lunardi, P.G. Bizzeti, C. Bucci, M. Chiari, A. Dainese, P. Di Nezza, R. Menegazzo, A. Nannini, C. Signorini, J.J. Valiente-Dobon, P., Russotto, M., Chartier, M. D., Cozma, E., De Filippo, A., Le Fevre, S., Gannon, A., Gašsparić, M., Kiš, S., Kupny, Y., Leifel, R., Lemmon, Q., Li, J., Lukasik, P., Marini, P., Pawlowski, S., Santoro, W., Trautmann, M., Veselsky, L., Acosta, M., Adamczyk, A., Al Ajlan, M., Al Garawi, S., Al Homaidhi, F., Amorini, L., Auditore, T., Aumann, Y., Ayyad, V., Baran, Z., Basrak, R., Bassini, J., Benlliure, C., Boiano, C., Boisjoli, K., Boretzky, J., Brzychczyk, A., Budzanowski, G., Cardella, P., Cammarata, Z., Chajecki, A., Chbihi, M., Colonna, B., Czech, M., Di Toro, M., Famiano, V., Greco, L., Grassi, C., Guazzoni, P., Guazzoni, M., Heil, L., Heilborn, R., Introzzi, T., Isobe, K., Kezzar, A., Krasznahorskay, N., Kurz, E., La Guidara, G., Lanzalone, P., Lasko, Lombardo, Ivano, W. G., Lynch, Z., Matthew, L., May, T., Minniti, M., Mostazo, A., Pagano, M., Papa, S., Pirrone, R., Pleskac, G., Politi, F., Porto, R., Reifarth, W., Reisdorf, F., Riccio, F., Rizzo, Rosato, Elio, D., Rossi, H., Simon, I., Skwirczynska, Z., Sosin, L., Stuhl, A., Trifirò, M., Trimarchi, M. B., Tsang, G., Verde, Vigilante, Mariano, A., Wieloch, P., Wigg, H. H., Wolter, P., Wu, S., Yennello, P., Zambon, L., Zetta, and M., Zoric

Subjects
flow, NUCLEAR COLLISIONS
Abstract

The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of heavy-ions at pre-relativistic energies has been proposed as an observable sensitive to the strength of the symmetry term of the nuclear equation of state at supra-saturation densities. The results obtained from the existing FOPI/LAND data for 197Au+197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model simulations favoured a moderately soft symmetry term, but suffer from a considerable statistical uncertainty. These results have been confirmed by an independent analysis based on the Tübingen QMD simulations. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI laboratory by the ASY-EOS collaboration. The present status of the data analysis is reported

Published
2014

48. Position sensitivity in large spectroscopic LaBr3:Ce crystals for Doppler broadening correction

Author

Stefano Riboldi, Agnese Giaz, S. Brambilla, N. Blasi, C. Boiano, F. Camera, and B. Million

Subjects
Physics, Photomultiplier, Nuclear and High Energy Physics, Doppler broadening, Imaging, LaBr3:Ce scintillators, Position sensitivity, Instrumentation, 010308 nuclear & particles physics, business.industry, Gamma ray, Measure (physics), Phosphor, 01 natural sciences, Electromagnetic radiation, Crystal, Optics, Position (vector), 0103 physical sciences, Atomic physics, 010306 general physics, business
Abstract

The position sensitivity of a large LaBr 3 :Ce crystal was investigated with the aim of correcting for the Doppler broadening in nuclear physics experiments. The crystal was cylindrical, 3 in×3 in (7.62 cm x 7.62 cm) and with diffusive surfaces as typically used in nuclear physics basic research to measure medium or high energy gamma rays (0.5 MeV γ

Published
2016

49. Fast neutron measurements with7Li and6Li enriched CLYC scintillators

Author

A. Giaz, F. Salamida, S. Brambilla, A. Mentana, C. Cattadori, F. Camera, Luna Pellegri, B. Million, C. Boiano, S. Ceruti, Marica Rebai, Stefano Riboldi, I Mattei, N. Blasi, M. Tardocchi, Tommaso Marchi, and F. Gramegna

Subjects
Physics, Scintillation, Nuclear and High Energy Physics, Gamma-ray detector, CLYC Scintillator detector, Fast neutron measurement, Neutron detection, Instrumentation, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, Resolution (electron density), Gamma ray, Scintillator, 01 natural sciences, Nuclear physics, 0103 physical sciences, Neutron, 010306 general physics, Gamma energy
Abstract

The recently developed Cs2LiYCl6:Ce (CLYC) crystals are interesting scintillation detectors not only for their gamma energy resolution (

Published
2016

50. The experimental set-up of the RIB in-flight facility EXOTIC

Author

A. Boiano, C. Manea, C. Cassese, C. Signorini, D. Pierroutsakou, M. Tessaro, M. Bettini, M. Mazzocco, D. Corti, G. Pontoriere, D. Torresi, B. De Fazio, L. Roscilli, P.G. Zatti, A. Anastasio, M. Sandoli, P. Molini, M. Romoli, F. Soramel, G. Galet, L. Costa, J. Grebosz, L. Stroe, L. Castellani, M. Nicoletto, C. Boiano, T. Glodariu, P. Di Meo, R. Rocco, G. Tortone, A. Guglielmetti, E. Strano, C. Parascandolo, M. La Commara, N. Toniolo, Pierroutsakou, D, Boiano, A., Boiano, C., Di Meo, P., LA COMMARA, Marco, Manea, C., Mazzocco, M., Nicoletto, M., Parascandolo, C., Signorini, C., Soramel, F., Strano, E., Toniolo, N., Torresi, D., Tortone, G., Anastasio, A., Bettini, M., Cassese, C., Castellani, L., Corti, D., Costa, L., De Fazio, B., Galet, G., Glodariu, T., Grebosz, J., Guglielmetti, A., Molini, P., Pontoriere, G., Rocco, R., Romoli, M., Roscilli, L., Sandoli, M., Stroe, L., Tessaro, M., and Zatti, P. G.

Subjects
Nuclear and High Energy Physics, ASIC electronic, Preamplifier, Analog-to-digital converter, Tracking (particle physics), 01 natural sciences, Radioactive Ion Beams, law.invention, Radioactive Ion Beam, ASIC electronics, Charged-particle detection array, Data conversion and acquisition, Low-noise electronics, Tracking and position-sensitive detectors, Instrumentation, Telescope, Optics, Data acquisition, law, 0103 physical sciences, 010306 general physics, Electronic circuit, Nuclear and High Energy Physic, Physics, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation Radioactive Ion Beam, Low-noise electronic, Time of flight, Tracking and position-sensitive detector, business
Abstract

We describe the experimental set-up of the Radioactive Ion Beam (RIB) in-flight facility EXOTIC consisting of: (a) two position-sensitive Parallel Plate Avalanche Counters (PPACs), dedicated to the event-by-event tracking of the produced RIBs and to time of flight measurements and (b) the new high-granularity compact telescope array EXPADES (EXotic PArticle DEtection System), designed for nuclear physics and nuclear astrophysics experiments employing low-energy light RIBs. EXPADES consists of eight Δ E – E res telescopes arranged in a cylindrical configuration around the target. Each telescope is made up of two Double Sided Silicon Strip Detectors (DSSSDs) with a thickness of 40/60 μm and 300 μm for the Δ E and Eres layer, respectively. Additionally, eight ionization chambers were constructed to be used as an alternative Δ E stage or, in conjunction with the entire DSSSD array, to build up more complex triple telescopes. New low-noise multi-channel charge-sensitive preamplifiers and spectroscopy amplifiers, associated with constant fraction discriminators, peak-and-hold and Time to Amplitude Converter circuits were developed for the electronic readout of the Δ E stage. Application Specific Integrated Circuit-based electronics was employed for the treatment of the Eres signals. An 8-channel, 12-bit multi-sampling 50 MHz Analog to Digital Converter, a Trigger Supervisor Board for handling the trigger signals of the whole experimental set-up and an ad hoc data acquisition system were also developed. The performance of the PPACs, EXPADES and of the associated electronics was obtained offline with standard α calibration sources and in-beam by measuring the scattering process for the systems 17O+58Ni and 17O+208Pb at incident energies around their respective Coulomb barriers and, successively, during the first experimental runs with the RIBs of the EXOTIC facility.

Published
2016

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