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142 results on '"Gnoffo, B."'

1. Decay study of $^{11}$Be with an Optical TPC detector

Author

Sokołowska, N., Guadilla, V., Mazzocchi, C., Ahmed, R., Borge, M., Cardella, G., Ciemny, A. A., Cosentino, L. G., De Filippo, E., Fedosseev, V., Fijałkowska, A., Fraile, L. M., Geraci, E., Giska, A., Gnoffo, B., Granados, C., Janas, Z., Janiak, Ł., Johnston, K., Kamiński, G., Korgul, A., Kubiela, A., Maiolino, C., Marsh, B., Martorana, N. S., Miernik, K., Molkanov, P., Ovejas, J. D., Pagano, E. V., Pirrone, S., Pomorski, M., Quynh, A. M., Riisager, K., Russo, A., Russotto, P., Świercz, A., Viñals, S., Wilkins, S., and Pfützner, M.

Subjects
Nuclear Experiment
Abstract

The $\beta$ decay of one-neutron halo nucleus $^{11}$Be was investigated using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure $\beta$-delayed charged particles. The results of two experiments are reported. In the first one, carried out in LNS Catania, the absolute branching ratio for $\beta$-delayed $\alpha$ emission was measured by counting incoming $^{11}$Be ions stopped in the detector and the observed decays with the emission of $\alpha$ particle. The result of 3.27(46)\% is in good agreement with the literature value. In the second experiment, performed at the HIE-ISOLDE facility at CERN, bunches containing several hundreds of $^{11}$Be ions were implanted into the OTPC detector followed by the detection of decays with the emission of charged particles. The energy spectrum of $\beta$-delayed $\alpha$ particles was determined in the full energy range. It was analysed in the R-matrix framework and was found to be consistent with the literature. The best description of the spectrum was obtained assuming that the two $3/2^+$ and one $1/2^+$ states in $^{11}$B are involved in the transition. The search for $\beta$-delayed emission of protons was undertaken. Only the upper limit for the branching ratio for this process of $(2.2 \pm 0.6_{\rm stat} \pm 0.6_{\rm sys}) \times 10^{-6}$ could be determined. This value is in conflict with the result published in [Ayyad et al. Phys. Rev. Lett. 123, 082501 (2019)] but does agree with the limit reported in [Riisager et al., Eur. Phys. J. A (2020) 56:100], Comment: 16 pages, 18 figures, submitted to Phys. Rev. C

Published
2024

2. Experimental investigation of $\alpha$-condensation in light nuclei

Author

Bishop, Jack, Kokalova, Tzany, Freer, Martin, Acosta, L, Assie, M, Bailey, S, Cardella, G, Curtis, N, De Filippo, E, Dell'Aquila, D, De Luca, S, Francalanza, L, Gnoffo, B, Lanzalone, G, Lombardo, I, Martorana, N. S., Norella, S, Pagano, A, Pagano, E. V., Papa, M., Pirrone, S., Politi, G, Rizzo, F, Russotto, P, Quattrocchi, L, Smith, R, Stefan, I, Trifiro, A, Trimarchi, M, Verde, G, Vigilante, M, and Wheldon, C

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Method: To examine signatures of this alpha-condensation, a compound nucleus reaction using 160, 280, and 400 MeV 16O beams impinging on a carbon target was used to investigate the 12C(16O,7a) reaction. This permits a search for near-threshold states in the alpha-conjugate nuclei up to 24Mg. Results: Events up to an alpha-particle multiplicity of 7 were measured and the results were compared to both an Extended Hauser-Feshbach calculation and the Fermi break-up model. The measured multiplicity distribution exceeded that predicted from a sequential decay mechanism and had a better agreement with the multi-particle Fermi break-up model. Examination of how these 7 alpha final states could be reconstructed to form 8Be and 12C(0_2+) showed a quantitative difference in which decay modes were dominant compared to the Fermi break-up model. No new states were observed in 16O, 20Ne, and 24Mg due to the effect of the N-alpha penetrability suppressing the total alpha-particle dissociation decay mode. Conclusion: The reaction mechanism for a high energy compound nucleus reaction can only be described by a hybrid of sequential decay and multi-particle breakup. Highly alpha-clustered states were seen which did not originate from simple binary reaction processes. Direct investigations of near-threshold states in N-alpha systems are inherently impeded by the Coulomb barrier prohibiting the observation of states in the N-alpha decay channel. No evidence of a highly clustered 15.1 MeV state in 16O was observed from (28Si*,12C(0_2+))16O(0_6+) when reconstructing the Hoyle state from 3 alpha-particles. Therefore, no experimental signatures for alpha-condensation were observed.

Published
2019
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3. Measurement of Nuclear Interaction Cross Sections towards Neutron-Skin Thickness Determination

Author

Ponnath, L., primary, Aumann, T., additional, Bertulani, C.A., additional, Gernhäuser, R., additional, Heil, M., additional, Almusidi, T., additional, Alvarez-Pol, H., additional, Atar, L., additional, Atkins, L., additional, Ayyad, Y., additional, Benlliure, J., additional, Boretzky, K., additional, Borge, M.J.G., additional, Bott, L.T., additional, Bruni, G., additional, Brückner, B., additional, Cabanelas, P., additional, Caesar, C., additional, Casarejos, E., additional, Cederkall, J., additional, Corsi, A., additional, Cortina-Gil, D., additional, Dueñas, J.A., additional, Duer, M., additional, Elekes, Z., additional, Escribano Rodriguez, S., additional, Fabbietti, L., additional, Falduto, A., additional, Feijoo, M., additional, Feijoo Fontan, M., additional, Fonseca, L.M., additional, Frotscher, A., additional, Galaviz, D., additional, Galiana, E., additional, García-Jiménez, G., additional, Gašparic̀, I., additional, Geraci, E.I., additional, Gillibert, A., additional, Gnoffo, B., additional, González Caamaño, D., additional, Graña González, A., additional, Göbel, K., additional, Hartig, A.-L., additional, Heinz, A., additional, Hensel, T., additional, Holl, M., additional, Horvat, A., additional, Jedele, A., additional, Jelavic̀ Malenica, D., additional, Jenegger, T., additional, Johansson, H.T., additional, Jonson, B., additional, Kalantar-Nayestanaki, N., additional, Kelic-Heil, A., additional, Kiselev, O.A., additional, Klenze, P., additional, Kresan, D., additional, Kröll, T., additional, Kudaibergenova, E., additional, Kurtulgil, D., additional, Körper, D., additional, Labiche, M., additional, Langer, C., additional, Lihtar, I., additional, Litvinov, Yu.A., additional, Löher, B., additional, Mayer, J., additional, Murillo Morales, S., additional, Nacher, E., additional, Nilsson, T., additional, Obertelli, A., additional, Panin, V., additional, Park, J., additional, Paschalis, S., additional, Perea, A., additional, Petri, M., additional, Pirrone, S., additional, Pohl, T., additional, Reifarth, R., additional, Rhee, H.-B., additional, Rodriguez-Sanchez, J.L., additional, Rose, L., additional, Rossi, D.M., additional, Russotto, P., additional, Savran, D., additional, Scheit, H., additional, Simon, H., additional, Storck-Dutine, S., additional, Stott, A.M., additional, Sürder, C., additional, Taniuchi, R., additional, Tengblad, O., additional, Teubig, P., additional, Trache, L., additional, Trimarchi, M., additional, Törnqvist, H.T., additional, Varga, L., additional, Wagner, V., additional, and Wamers, F., additional

Published
2024
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4. Isospin influence on dynamical production of Intermediate Mass Fragments at Fermi Energies

Author

Russotto, P., De Filippo, E., Pagano, E. V., Acosta, L., Auditore, L., Cap, T., Cardella, G., De Luca, S., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Norella, S., Pagano, A., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Siwek-Wilczyńska, K., Trifirò, A., Trimarchi, M., Verde, G., and Wilczyński, J.

Subjects
Nuclear Experiment
Abstract

The Intermediate Mass Fragments emission probability from Projectile-Like Fragment break-up in semi-peripheral reactions has been measured in collisions of $^{124}$Xe projectiles with two different targets of $^{64}$Ni and $^{64}$Zn at the laboratory energy of 35 \amev. The two colliding systems differ only for the target atomic number Z and, consequently, for the Isospin $N/Z$ ratio. An enhancement of Intermediate Mass Fragments production for the neutron rich $^{64}$Ni target, with respect to the $^{64}$Zn, is found. In the case of one Intermediate Mass Fragment emission, the contributions of the dynamical and statistical emissions have been evaluated, showing that the increase of the effect above is due to an enhancement of the dynamical emission probability, especially for heavy IMFs (Z$\gtrsim$ 7). This proves an influence of the target Isospin on inducing the dynamical fragment production from Projectile-Like Fragment break-up. In addition, a comparison of the Xe+Ni,Zn results with the previously studied $^{112,124}Sn+^{58,64}Ni$ systems is discussed in order to investigate the influence of the projectile Isospin alone and to disentangle between Isospin effects against system-size effects on the emission probability. These comparisons suggest that the prompt-dynamical emission is mainly ruled by the $N/Z$ content of, both, projectile and target; for the cases here investigated, the influence of the system size on the dynamical emission probability can be excluded.

Published
2018

5. Dipolar degrees of freedom and Isospin equilibration processes in Heavy Ion collisions

Author

Papa, M., Berceanu, I., Acosta, L., Amorini, F., Agodi, C., Anzalone, A., Auditore, L., Cardella, G., Cavallaro, S., Chatterjee, M. B., De Filippo, E., Francalanza, L., Geraci, E., Grassi, L., Gnoffo, B., Han, J., La Guidara, E., Lanzalone, G., Lombardo, I., Pagano, C. Maiolino T. Minniti A., Pagano, E. V., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.

Subjects
Nuclear Experiment
Abstract

Background: In heavy ion collision at the Fermi energies Isospin equilibration processes occur- ring when nuclei with different charge/mass asymmetries interacts have been investigated to get information on the nucleon-nucleon Iso-vectorial effective interaction. Purpose: In this paper, for the system 48Ca +27 Al at 40 MeV/nucleon, we investigate on this process by means of an observable tightly linked to isospin equilibration processes and sensitive in exclusive way to the dynamical stage of the collision. From the comparison with dynamical model calculations we want also to obtain information on the Iso-vectorial effective microscopic interaction. Method: The average time derivative of the total dipole associated to the relative motion of all emitted charged particles and fragments has been determined from the measured charges and velocities by using the 4? multi-detector CHIMERA. The average has been determined for semi- peripheral collisions and for different charges Zb of the biggest produced fragment. Experimental evidences collected for the systems 27Al+48Ca and 27Al+40Ca at 40 MeV/nucleon used to support this novel method of investigation are also discussed., Comment: Submitted for publication on Phys. Rev. C. 0n 24-oct-2014

Published
2015
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6. Study of multinucleon knockout reactions of exotic nuclei in the region of Sn

Author

Feijoo-Fontán M., Kudaibergenova E., Liblar I., Gasparic I., Horvat A., Rodriguez-Sanchez J.L., Panin V., Alvarez-Pol H., Atar L., Aumann T., Benlliure J., Boretzky K., Borge M.J.G., Bott L.T., Caesar C., Casarejos E., Cederkall J., Chatillon A., Cortina-Gil D., Filippo E., Dickel T., Duer M., Falduto A., Galaviz D., García-Jiménez G., Ge Z., Geraci E.I., Gernhäuser R., Gnoffo B., Graña-González A., Göbel K., Haettner E., Hartig A.L., Heil M., Heinz A., Hensel T., Holl M., Hornung C., Jedele A., Jelavic-Malenica D., Jenegger T., Ji L., Johansson H.T., Kalantar-Nayestanaki N., Kazantseva E., Kelic-Heil A., Kiselev O.A., Klenze P., Knoebel R., Körper D., Kröll T., Löher B., Martorana N.S., Milhomens da Fonseca L., Morfouace P., Mukha I., Murillo-Morales S., Nácher E., Nociforo C., Obertelli A., Paschalis S., Perea A., Petri M., Pietri S., Pirrone S., Ponnath L., Rhee H.B., Rose L., Rossi D.M., Russotto P., Savran D., Scheidenberger C., Simon H., Simon J.P., Storck-Dunite S., Stott A., Sun Y., Symochko D., Sürder C., Taïeb J., Taniuchi R., Tengblad O., Törnqvist H.T., Velardita S., Wamers F., Weick H., and Zhao J.

Subjects
Physics, QC1-999
Abstract

The experimental data collected during the S515 experiment performed by the R3B collaboration at GSI/FAIR represent a great opportunity to investigate nucleon knockout reactions of exotic nuclei in the region of Sn using complete kinematics measurements. These cross sections can be used in the future to investigate the quenching in the knockout of the minority species (neutrons or protons) in nuclei far from stability. Some of the arguments put forward are the underestimation of the knockout of deeply bound nucleons, final state interactions or the role of short-range correlations (SRC). Recently, several works based on inclusive measurements have shown that these SRCs could reduce the single nucleon knockout cross sections by around 50%, depending on the neutron excess (N/Z) of the initial projectile. The S515 data can help us to go further in this investigation because it allows to correlate the knockout cross sections of one, two or more nucleons with the number of protons and neutrons emitted from the target and which can be detected by the CALIFA and NeuLAND detectors, respectively, and perform complete kinematical studies on the nature of the event (SRC, evaporation, emission of clusters, final-state interactions...). Here the results obtained for the charge distribution of reaction residues are presented, which is one of the first steps of the still on-going analysis.

Published
2023
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7. Study of (p,2p) fission reactions in inverse kinematics using the R3B set-up

Author

García-Jiménez G., Alvarez-Pol H., Graña-González A., Rodríguez-Sánchez J.L., Benlliure J., Cortina-Gil D., Atar L., Audouin L., Authelet G., Besteiro A., Blanchon G., Boretzky K., Borge M.J.G., Cabanelas P., Casarejos E., Cederkall J., Chatillon A., Corsi A., Feijoo M., De Filippo E., Galaviz D., Gasparic I., Geraci E., Gernhäuser R., Gnoffo B., Heil M., Heinz A., Hensel T., Holl M., Jelavic Malenica D., Jenegger T., Ji L., Johansson H.T., Kiselev O.A., Klenze P., Knyazev A., Körper D., Kröll T., Lithar I., Litvinov Y.A., Löher B., Martorana N. S., Morfouace P., Mücher D., Murillo-Morales S., Obertelli A., Panin V., Park J., Paschalis S., Perea A., Petri M., Pirrone S., Ponnath L., Revel A., Rhee H., Rose L., Rossi D.M., Russotto P., Simon H., Stott A., Sun Y., Sürder C., Taïeb J., Taniuchi R., Tengblad O., Törnqvist H.T., Trimarchi M., Velardita S., Vesic J., and Voss B.

Subjects
Physics, QC1-999
Abstract

A new experimental fission approach is presented in the context of the R3B (Reactions with Relativistic Radioactive Beams) collaboration, at the GSI/FAIR facility, in which knockout reactions in inverse kinematics are used to induce fission of 238U that will allow to characterise the excitation energy of the fission process and all the fission products. The CALIFA (CALorimeter for In-Flight detection of γ-rays and high energy charged pArticles) calorimeter, a key part of the R3B set-up, is used to reconstruct the momenta of the two protons from the (p, 2p) reactions. Preliminary results show that kinematic variables and first estimates for nucleon-removal cross sections are well reconstructed and in good agreement with other experimental measurements.

Published
2023
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8. Fission studies in inverse kinematics with the R3B setup

Author

Graña-González A., Rodríguez-Sánchez J.L., Benlliure J., García-Jiménez G., Alvarez-Pol H., Cortina-Gil D., Atar L., Audouin L., Authelet G., Besteiro A., Blanchon G., Boretzky K., Borge M.J.G., Cabanelas P., Casarejos E., Cederkall J., Chatillon A., Corsi A., Feijoo M., De Filippo E., Galaviz D., Gasparic I., Geraci E., Gernhäuser R., Gnoffo B., Heil M., Heinz A., Hensel T., Holl M., Jelavic Malenica D., Jenegger T., Ji L., Johansson H., Kiselev O.A., Klenze P., Knyazev A., Körper D., Kröll T., Lihtar I., Litvinov Y., Löher B., Martorana N.S., Morfouace P., Mücher D., Murillo Morales S., Obertelli A., Panin V., Park J., Paschalis S., Perea A., Petri M., Pirrone S., Ponnath L., Revel A., Rhee H.-B., Rose L., Rossi D.M., Russotto P., Simon H., Stott A., Sun Y., Sürder C., Taïeb J., Taniuchi R., Tengblad O., Törnqvist H.T., Trimarchi M., Velardita S., Vesic J., and Voss B.

Subjects
Physics, QC1-999
Abstract

Nuclear fission is a complex dynamical process, whose description involves the coupling between intrinsic and collective degrees of freedom, as well as different quantum-mechanical phenomena. For this reason, to this day it still lacks a satisfactory and complete microscopic description. In addition to the importance of describing fission itself, studies of the r-process in astrophysics depend on fission observables to constrain the theoretical models that explain the isotopic abundances in the Universe. To improve on the existing data, fission reactions of heavy nuclei in inverse kinematics are produced in quasi-free (p,2p) scattering reactions, which induce fission through particle-hole excitations that can range from few to tens of MeV. In order to study the evolution of the fission yields with temperature, the excitation energy of the fissioning system must be reconstructed, which is possible by measuring the four-momenta of the two outgoing protons. Performing this kind of experiment requires a complex experimental setup, providing full isotopic identification of both fission fragments and an accurate measurement of the momenta of the two outgoing protons. This was realized recently at the GSI/FAIR facility and some of the results obtained for the charge distributions are presented in this work.

Published
2023
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9. Clustering states in neutron-rich nuclei.

Author

Risitano, F., Gnoffo, B., Trimarchi, M., Acosta, L., Cardella, G., De Filippo, E., Dell'Aquila, D., Geraci, E., Lombardo, I., Maiolino, C., Martorana, N.S., Pagano, A., Pagano, E.V., Papa, M., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Santagati, G., and Zagami, C.

Published
2023
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10. NArCoS: The new hodoscope for neutrons and charged particles

Author

Pagano, E. V., primary, De Filippo, E., additional, Russotto, P., additional, Cardella, G., additional, Castoldi, A., additional, Geraci, E., additional, Gnoffo, B., additional, Guazzoni, C., additional, Lanzalone, G., additional, Maiolino, C., additional, Martorana, N. S., additional, Pagano, A., additional, Pirrone, S., additional, Politi, G., additional, Risitano, F., additional, Rizzo, F., additional, and Trimarchi, M., additional

Published
2023
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11. Clustering and molecular states in neutron rich nuclei

Author

Gnoffo, B., primary, Pirrone, S., additional, Politi, G., additional, Cardella, G., additional, De Filippo, E., additional, Geraci, E., additional, Maiolino, C., additional, Martorana, N. S., additional, Pagano, A., additional, Pagano, E. V., additional, Papa, M., additional, Risitano, F., additional, Rizzo, F., additional, Russotto, P., additional, and Trimarchi, M., additional

Published
2022
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12. Radioactive ion beam opportunities at the new FRAISE facility of INFN-LNS

Author

Martorana, N. S., primary, Cardella, G., additional, Guazzoni, C., additional, Pagano, E. V., additional, Russo, A. D., additional, Russotto, P., additional, Acosta, L., additional, Amato, A., additional, Calabretta, L., additional, Caruso, A., additional, Cavallaro, S., additional, Cosentino, L., additional, Costa, M., additional, De Filippo, E., additional, De Luca, G., additional, Geraci, E., additional, Gnoffo, B., additional, Maiolino, C., additional, Passarello, S., additional, Pirrone, S., additional, Politi, G., additional, Pulvirenti, S., additional, Risitano, F., additional, Rizzo, F., additional, Santonocito, D., additional, Trifiró, A., additional, Trimarchi, M., additional, Tudisco, S., additional, and Vecchio, G., additional

Published
2022
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13. A new Time-of-flight detector for the R$$^3$$B setup

Author

Heil, M., Kelić-Heil, A., Bott, L., Almusidi, T., Alvarez-Pol, H., Atar, L., Atkins, L., Aumann, T., Benlliure, J., Boretzky, K., Brückner, B., Cabanelas, P., Caesar, C., Casarejos, E., Cederkall, J., Chulkov, L., Corsi, A., Dueñas, J., Erbacher, P., Rodriguez, S. Escribano, Falduto, A., Feijoo, M., Frotscher, A., Frühauf, J., Gašparić, I., Borge, M. J. G., Gerbig, J., Gernhäuser, R., Gilbert, M., Glorius, J., Gnoffo, B., Göbel, K., Caamaño, D. Gonzalez, Grein, A., Hartig, A.-L., Heggen, H., Heine, M., Heinz, A., Holl, M., Homm, I., Horvat, A., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kamenyero, A., Khodaparast, A., Kiselev, O., Klenze, P., Knösel, M., Koch, K., Körper, D., Kröll, T., Kurtulgil, D., Kurz, N., Löher, B., Langer, C., Lehr, C., Litvinov, Y., Liu, H., Morales, S. Murillo, Nácher, E., Nilsson, T., Park, J., Paschalis, S., Pellegri, L., Perea, A., Petri, M., Pohl, T., Ponnath, L., Popočovski, R., Reifarth, R., Rhee, H.-B., Sanchez, J. L. Rodriguez, Rossi, D., Sürder, C., Sánchez-Benítez, A. M., Savran, D., Scheit, H., Simon, H., Slavkovská, Z., Storck-Dutine, S., Sun, Y., Törnqvist, H. T., Tanaka, J., Tengblad, O., Thomas, B., Varga, L., Volknandt, M., Wagner, V., Wamers, F., Zanetti, L., Aliotta, Marialuisa, Alkhazov, Georgy, Almusidi, Tahani, Alvarez-Pol, Hector, André, Paul, Assié, Marlène, Atar, Leyla, Atkins, Liam, Audouin, Laurent, Aumann, Thomas, Authelet, Gilles, Ayyad, Yassid, Bajzek, Martin, Barriere, Antoine, Beceiro-Novo, Saul, Belogurov, Sergey, Bemmerer, Daniel, Benlliure, Jose, Bertulani, Carlos, Bezbakh, Andrey, Blanchon, Guillaume, Boos, Carl Georg, Boretzky, Konstanze, Borge, Maria J., Borzov, Ivan, Bott, Lukas, Brückner, Benjamin, Cabanelas Eiras, Pablo, Caesar, Christoph, Calinescu, Stefana, Casarejos, Enrique, Catford, Wilton, Cederkall, Joakim, Chatillon, Audrey, Cherciu, Madalin Ilie, Chishti, M Majid Rauf, Chulkov, Leonid, Cirstian, Andreea, Corsi, Anna, Cortina-Gil, Dolores, Cravo, Edgar, Crespo, Raquel, Danilov, Andrey, de Angelis, Giacomo, De Filippo, Enrico, Diaz-Torres, Alexis, Dickel, Timo, Dobrovolsky, Alexander, Doornenbal, Pieter, Duer, Meytal, Egelhof, Peter, Elekes, Zoltan, Enders, Joachim, Erbacher, Philipp, Escribano Rodriguez, Sonia, Fahlander, Claes, Falduto, Ashton, Feijoo, Martina, Fernandez Ruiz, Daniel, Fomichev, Andrey, Fulop, Zsolt, Galaviz Redondo, Daniel, Galiana, Elisabet, García, Gabriel, García Távora, Vicente, Gasparic, Igor, Ge, Zhuang, Geissel, Hans, Geraci, Elena, Gerl, Jürgen, Gernhäuser, Roman, Gillibert, Alain, Glorius, Jan, Gnoffo, Brunilde, Göbel, Kathrin, Golovkov, Mikhail, Golovtsov, Victor, Golubev, Pavel, González Caamaño, David, Gorshkov, Alexander, Graña González, Antia, Gridnev, Anatoly, Gruzinskii, Nikolai, Guimaraes, Valdir, Harakeh, Muhsin N., Hartig, Anna-Lena, Heftrich, Tanja, Heggen, Henning, Heil, Michael, Heinz, Andreas, Hen, Or, Henrich, Corinna, Henriques, Ana, Hensel, Thomas, Holl, Matthias, Homm, Ilja, Horvat, Andrea, Horváth, Ákos, Hucka, Jan-Paul, Inglessi, Alexander, Jedele, Andrea, Jelavic Malenica, Desa, Jenegger, Tobias, Ji, Liancheng, Johansson, Håkan, Jonson, Björn, Jurado, Beatriz, Kahlbow, Julian, Kalantar-Nayestanaki, Nasser, Kamenyero, Armel, Kazantseva, Erika, Kelic-Heil, Aleksandra, Khanzadeev, Alexey, Kiselev, Oleg, Klenze, Philipp, Knyazev, Alexander, Koch, Karsten, Kogimtzis, Moschos, Kokubun, Kei, Korolev, Guerman, Körper, Daniel, Korsheninnikov, Alexey, Korten, Wolfram, Kozlenko, Nikolai, Krasilovskaja, Sabina, Kresan, Dmytro, Krivshich, Anatoly, Kröll, Thorsten, Krupko, Sergey, Kudaibergenova, Eleonora, Kunne Sohler, Dorottya, Kurtulgil, Deniz, Kurz, Nikolaus, Kuzmin, Evgeny, Kuznetsov, Viacheslav, Labiche, Marc, Lagni, Andrea, Langer, Christoph, Lányi, Zsombor, Lazarus, Ian, Le Fèvre, Arnaud, Leifels, Yvonne, Lepine-Szily, Alinka, Lewitowicz, Marek, Lihtar, Ivana, Linh, Bui, Litvinov, Yuri, Liu, Hongna, Löher, Bastian, Lommel, Bettina, Lorenz, Enis, Lukasik, Jerzy, Macchiavelli, Augusto, Maev, Evgeny, Maillertet, Charles, Maisuzenko, Dmitrii, Maj, Adam, Martorana, Nunzia Simona, Mauss, Benoît, Mayri, Christophe, Milhomens da Fonseca, Leandro, Morfouace, Pierre, Mozumdar, Nikhil, Mücher, Dennis, Murillo Morales, Silvia, Nacher, Enrique, Nikolskii, Evgenii, Nilsson, Thomas, Nociforo, Chiara, Nolden, Fritz, Nyman, Göran, Obertelli, Alexandre, Pagano, Emanuele Vincenzo, Panin, Valerii, Park, Joochun, Paschalis, Stefanos, Pei, Junchen, Perea, Angel, Petri, Marina, Piasetzky, Eli, Pietri, Stephane, Pirrone, Sara, Politi, Giuseppe, Pollacco, Emauel, Ponnath, Lukas, Potlog, Petru-Mihai, Prajapat, Rinku, Pritula, Roman, Qi, Hang, Rappold, Christophe, Reifarth, Rene, Revel, Aldric, Rhee, Han-Bum, Risitano, Fabio, Rodriguez Sanchez, Jose Luis, Rose, Luke, Rossi, Dominic, Rudigier, Matthias, Russotto, Paolo, Sánchez-Benítez, Ángel-Miguel, Sanjari, Shahab, Santamaria, Clementine, Sarantsev, Victor, Savran, Deniz, Scheidenberger, Christoph, Scheit, Heiko, Schmidt, Konrad, Simon, Haik, Simon, Johannes, Slavkovská, Zuzana, Slepnev, Roman, Sorlin, Olivier, Sousa, Tomás, Spiridon, Alexandra, Stan, Emil, Stanoiu, Mihai, Stefanescu, Alexandra, Stefanescu, Ionut, Storck-Dutine, Sonja, Stott, Aaron, Sun, Baohua, Sun, Yelei, Sürder, Christian, Taieb, Julien, Tanaka, Junki, Tanihata, Isao, Taniuchi, Ryo, Tengblad, Olof, Terekhin, Pavel, Teubig, Pamela, Törnqvist, Hans, Trache, Livius, Trautmann, Wolfgang, Trimarchi, Marina, Typel, Stefan, Uesaka, Tomohiro, Unsworth, Carl, Uvarov, Lev, Vandebrouck, Marine, Varga, Laszlo, Velardita, Simone, Velho, Paulo, Vencelj, Matjaz, Volknandt, Meiko, Volkov, Sergei, von Tresckow, Martin, Wagner, Andreas, Wamers, Felix, Wang, Yanzhao, Whitehead, Matthew, Wienholtz, Frank, Wimmer, Kathrin, Winkler, Martin, Xarepe, Manuel, Ye, Yanlin, Zacarias, Sabrina, Zamora Cardona, Juan Carlos, Zhang, Wei, Zhdanov, Andrei, Zhukov, Mikhail, Zilges, Andreas, Zuber, Kai, Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), 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), R3B, Federal Ministry of Education and Research (Germany), Helmholtz International Center for FAIR, Ministerio de Ciencia e Innovación (España), Xunta de Galicia, Agencia Estatal de Investigación (España), Swedish Research Council, Science and Technology Facilities Council (UK), Royal Society (UK), Projekt DEAL, Energy and Sustainability Research Institute Groni, and Nuclear Energy

Subjects
Nuclear and High Energy Physics, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract

19 pags., 16 figs., 8 tabs., We present the design, prototype developments and test results of the new time-of-flight detector (ToFD) which is part of the R3B experimental setup at GSI and FAIR, Darmstadt, Germany. The ToFD detector is able to detect heavy-ion residues of all charges at relativistic energies with a relative energy precision σΔE/ ΔE of up to 1% and a time precision of up to 14 ps (sigma). Together with an elaborate particle-tracking system, the full identification of relativistic ions from hydrogen up to uranium in mass and nuclear charge is possible., This work received support from BMBF (05P19RFFN1, 05P15RDFN1, 05P19RDFN1) and HIC for FAIR. J.P. has been supported by the Institute for Basic Science (IBS-R031-D1). E.C. has been supported by the Ministry of Science and Innovation in Spain (PGC2018-099746-B-C22). J.L.R.S. thanks the support from the Regional Government of Galicia under the program of postdoctoral fellowships ED481B-2017-002 and ED481D-2021-018. O.T. has been supported by AEI/FEDER, UE project No. PID2019-104390GB-I00. G.B., A.H., H.T.J., B.J. and T.N. have been supported by the Swedish Research Council under contract 2017-03839. This work was supported by the Royal Society and UK STFC awards ST/L005727/1, ST/P003885/1.

Published
2022
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14. Characteristic time scale of cluster production at the Fermi energy

Author

Pagano, A., Cardella, G., De Filippo, E., Geraci, E., Gnoffo, B., Lanzalone, G., Maiolino, C., Martorana, N. S., Pagano, E. V., Pirrone, S., Politi, G., Risitano, F., Rizzo, F., Russotto, P., Trifiro, A., and Trimarchi, M.

Subjects
Materials Science (miscellaneous), Biophysics, General Physics and Astronomy, Physical and Theoretical Chemistry, Mathematical Physics
Abstract

The study of heavy-ion collisions in the Fermi energy domain (20 MeV/nucleon < E/A < 100 MeV/nucleon) is a fundamental research topic in modern nuclear physics. In the case of semi-peripheral collisions, the Fermi energy regime is characterized by the formation of a transient, neck-like structure that connects a projectile-like fragment (PLF) with a target-like fragment (TLF). The neck structure represents a precursor of the fireball which is a typical overlap of participating nucleons at relativistic energies (E/A> 200 MeV/nucleon). It undergoes an expansion phase in a short time scale of the order of 100 fm/c with the formation of a low-density region of nuclear matter, therefore favoring the clusterization of intermediate mass fragments (IMFs) of atomic number Z (typically) less than 20. Particular emphasis is given to some relevant results obtained by the CHIMERA collaboration in the last decade, regarding the time scale of the production mechanisms of the intermediate mass fragments in neck fragmentation and their neutron enrichment.

Published
2022
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15. Status of the CLIR experiment at LNS

Author

Risitano F., Acosta L., Cardella G., De Filippo E., Dell'Aquila D., Favela F., Geraci E., Gnoffo B., Lombardo I., Maiolino C., Martorana N. S., Pagano A., Pagano E. V., Papa M., Pirrone S., Politi G., Rizzo F., Russotto P., Trifiro A., Trimarchi M., Risitano, F., Acosta, L., Cardella, G., De Filippo, E., Dell'Aquila, D., Favela, F., Geraci, E., Gnoffo, B., Lombardo, I., Maiolino, C., Martorana, N. S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Trifiro, A., and Trimarchi, M.

Abstract

To investigate exotic cluster structures in neutron-rich nuclei via break-up reactions on a light target, the CLIR experiment was performed at INFN - Laboratori Nazionali del Sud (LNS). To this aim, a Radioactive Ion Beam (RIB) was produced, by means of the FRIBs@LNS facility, exploiting the In-Flight fragmentation technique: in this way, the obtained beam contains several radioactive ions of interest, such as 6He, 7,8,9Li, 11,12Be, 13,14,15B, 17C, and even the 16C and 10Be isotopes, for which cluster structures have already been studied at LNS. The isotopes of the cocktail beam were identified by means of the ΔE-ToF method, and afterward break-up reactions were triggered by sending them on a (CH2)n polyethylene (protons) target; the reaction fragments were detected by the high-granularity femtoscope array FARCOS coupled with the CHIMERA 4π multidetector. In this paper an overview of the status of the experiment will be given, and in particular the calibration procedures developed for the tagging detector and for the FARCOS array will be described.

Published
2022

16. Recent results on the construction of a new correlator for neutrons and charged particles and for FARCOS

Author

Pagano, E. V., Acosta, L., Cardella, G., De Filippo, E., Geraci, E., Gnoffo, B., Guazzoni, C., Lanzalone, G., Maiolino, C., Martorana, N. S., Pagano, A., Papa, M., Pirrone, S., Politi, G., Risitano, F., Rizzo, F., Russotto, P., Simancas, A., and Trimarchi, M.

Subjects
ddc:530
Abstract

Il nuovo cimento / C 45C(3), 64 (2022). doi:10.1393/ncc/i2022-22064-1 special issue: "Colloquia: IWM-EC 2021", Published by Ed. Compositori, Bologna [u.a.]

Published
2022
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17. Population and decay of C-12 states

Author

Cardella, G, Bonasera, A, Martorana, Ns, Acosta, L, De Filippo, E, Geraci, E, Gnoffo, B, Guazzoni, C, Lo Monaco, G, Maiolino, C, Pagano, A, Pagano, Ev, Papa, M, Pirrone, S, Politi, G, Risitano, F, Rizzo, F, Russotto, P, and Trimarchi, M

Published
2022

18. Status of data analysis and preliminary results of the CHIFAR experiment

Author

Russotto, P., De Filippo, E., Pagano, E. V., Geraci, E., Maiolino, C., Martorana, N. S., Acosta, L., Cap, T., Cardella, G., Favela, F., Gnoffo, B., Guazzoni, C., Lanzalone, G., Matulewicz, T., Pagano, A., Papa, M., Piasecki, K., Pirrone, S., Płaneta, Roman, Politi, G., Risitano, F., Rizzo, F., Sicari, V., Siwek-Wilczynska, K., Skwira-Chalot, I., and Trimarchi, M.

Published
2022

19. The new fragment in-flight separator at INFN-LNS

Author

Martorana, Ns, Acosta, L, Altana, C, Amato, A, Calabretta, L, Cardella, G, Caruso, A, Cosentino, L, Costa, M, De Filippo, E, De Luca, G, Geraci, E, Gnoffo, B, Guazzoni, C, Maiolino, C, Pagano, Ev, Pirrone, S, Politi, G, Pulvirenti, S, Risitano, F, Rizzo, F, Russo, Ad, Russotto, P, Santonocito, D, Trifir, A, Trimarchi, M, Tudisco, S, and Vecchio, G

Published
2022

20. Highlights from CHIMERA Collaboration

Author

Geraci, E, Acosta, L, Cardella, G, Castoldi, A, De Filippo, E, Gnoffo, B, Guazzoni, C, Lanzalone, G, Maiolino, C, Martorana, Ns, Pagano, A, Pagano, Ev, Papa, M, Pirrone, S, Politi, G, Risitano, F, Rizzo, F, Russotto, P, Sicari, V, Trifiro, A, and Trimarch, M

Published
2022

21. First measurement of the isoscalar excitation above the neutron emission threshold of the Pygmy Dipole Resonance in 68Ni

Author

Martorana, N. S., Cardella, G., Lanza, E. G., Acosta, L., Andrés, M. V., Auditore, L., Catara, F., De Filippo, E., De Luca, S., Dell' Aquila, D., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Santonocito, D., Trifirò, A., Trimarchi, M., Vigilante, M., Vitturi, A., Rizzo, Francesca, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Martorana, N. S., Cardella, G., Lanza, E. G., Acosta, L., Andrés, M. V., Auditore, L., Catara, F., De Filippo, E., De Luca, S., Dell' Aquila, D., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Santonocito, D., Trifirò, A., Trimarchi, M., Vigilante, M., and Vitturi, A.

Subjects
Nuclear and High Energy Physics, Pygmy Dipole Resonance, Neutron emission, Population, Isoscalar probe, Unstable nuclei, 01 natural sciences, 0103 physical sciences, Neutron, 010306 general physics, education, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Physics, education.field_of_study, 010308 nuclear & particles physics, Gamma ray, lcsh:QC1-999, Dipole, Nuclear structure, heavy ions, Atomic physics, Nucleon, Radioactive decay, Excitation, lcsh:Physics
Abstract

The excitation of the Pygmy Dipole Resonance (PDR) in the 68Ni nucleus, above the neutron emission threshold, via an isoscalar probe has been observed for the first time. The excitation has been produced in reactions where a 68Ni beam, obtained by the fragmentation of a 70Zn primary beam at INFN-LNS, impinged on a 12C target. The γ-ray decay was detected using the CsI(Tl) detectors of the CHIMERA multidetector sphere. The 68Ni isotope as well as other heavy ion fragments were detected using the FARCOS array. The population of the PDR was evidenced by comparing the detected γ-ray energy spectra with statistical code calculations. The isotopic resolution of the detection system allows also to directly compare neutron decay channels with the 68Ni channel, better evidencing the PDR decay response function. This comparison allows also the extraction of the PDR cross section and the relative γ-ray angular distribution. The measured γ-ray angular distribution confirms the E1 character of the transition. The γ decay cross section for the excitation of the PDR was measured to be 0.32 mb with a 18% of statistical error. Keywords: Pygmy Dipole Resonance, Unstable nuclei, Isoscalar probe

Published
2018

22. NeuLAND: The High-Resolution Neutron Time-of-Flight Spectrometer for R³B at FAIR

Author

Boretzky, K., Gašparic, I., Heil, M., Mayer, J., Heinz, A., Caesar, C., Kresan, D., Simon, H., Törnqvist, H. T., Körper, D., Alkhazov, G., Atar, L., Aumann, T., Bemmerer, D., Bondarev, S. V., Bott, L. T., Chakraborty, S., Cherciu, M. I., Chulkov, L. V., Ciobanu, M., Datta, U., Filippo, E., Douma, C. A., Dreyer, J., Elekes, Z., Enders, J., Galaviz, D., Geraci, E., Gnoffo, B., Göbel, K., Golovtsov, V. L., Gonzalez Diaz, D., Gruzinsky, N., Haiduc, M., Heftrich, T., Heggen, H., Hehner, J., Hensel, T., Hoemann, E., Holl, M., Horvat, A., Horváth, Á., Ickert, G., Ignatov, A., Jelavi Malencia, D., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kelic-Heil, A., Kempe, M., Koch, K., Kozlenko, N. G., Krivshich, A. G., Kurz, N., Kuznetsov, V., Langer, C., Leifels, Y., Lihtar, I., Löher, B., Machado, J., Martorana, N. S., Miki, K., Nilsson, T., Nyman, G. H., Orischin, E. M., Pagano, E. V., Pirrone, S., Politi, G., Potlog, P.-M., Rahaman, A., Reifarth, R., Rigollet, C., Röder, M., Rossi, D. M., Russotto, P., Savran, D., Scheit, H., Schindler, F., Stach, D., Stan, E., Stomvall Gill, J., Teubig, P., Trimarchi, M., Uvarov, L., Volknandt, M., Wagner, A., Wagner, V., Wranne, S., Yakorev, D., Zanetti, L., Zilges, A., and Zuber, K.

Subjects
reactions with relativistic radioactive beams, multi-neutron detection, plastic scintillator scintillator array, Nuclear Experiment, high-energy neutron detection
Abstract

NeuLAND (New Large-Area Neutron Detector) is the next-generation neutron detector for the R3B (Reactions with Relativistic Radioactive Beams) experiment at FAIR (Facility for Antiproton and Ion Research). NeuLAND detects neutrons with energies from 100 to 1000 MeV, featuring a high detection efficiency, a high spatial and time resolution, and a large multi-neutron reconstruction efficiency. This is achieved by a highly granular design of organic scintillators: 3000 individual submodules with a size of 5x5x250 cm3 are arranged in 30 double planes with 100 submodules each, providing an active area of 250x250 cm2 and a total depth of 3 m. The spatial resolution due to the granularity together with a time resolution of 150 ps ensures high-resolution capabilities. In conjunction with calorimetric properties, a multi-neutron reconstruction efficiency of 50% to 70% for four-neutron events will be achieved, depending on both the emission scenario and the boundary conditions allowed for the reconstruction method. We present in this paper the final design of the detector as well as results from test measurements and simulations on which this design is based.

Published
2021

23. NeuLAND: The high-resolution neutron time-of-flight spectrometer for (RB)-B-3 at FAIR

Author

Boretzky, K., Gasparic, I, Heil, M., Mayer, J., Heinz, A., Caesar, C., Kresan, D., Simon, H., Toernqvist, H. T., Koerper, D., Alkhazov, G., Atar, L., Aumann, T., Bemmerer, D., Bondarev, S., V, Bott, L. T., Chakraborty, S., Cherciu, M., I, Chulkov, L., V, Ciobanu, M., Datta, U., De Filippo, E., Douma, C. A., Dreyer, J., Elekes, Z., Enders, J., Galaviz, D., Geraci, E., Gnoffo, B., Goebel, K., Golovtsov, V. L., Diaz, D. Gonzalez, Gruzinsky, N., Heftrich, T., Heggen, H., Hehner, J., Hensel, T., Hoemann, E., Holl, M., Horvat, A., Horvath, A., Ickert, G., Malenica, D. Jelavic, Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kelic-Heil, A., Kempe, M., Koch, K., Kozlenko, N. G., Krivshich, A. G., Kurz, N., Kuznetsov, V, Langer, C., Leifels, Y., Lihtar, I, Loeher, B., Machado, J., Martorana, N. S., Miki, K., Nilsson, T., Orischin, E. M., Pagano, E., V, Pirrone, S., Politi, G., Potlog, P. M., Rahaman, A., Reifarth, R., Rigollet, C., Roeder, M., Rossi, D. M., Russotto, P., Savran, D., Scheit, H., Schindler, F., Stach, D., Stan, E., Gill, J. Stomvall, Teubig, P., Trimarchi, M., Uvarov, L., Volknandt, M., Volkov, S., Wagner, A., Wagner, V, Wranne, S., Yakorev, D., Zanetti, L., Zilges, A., Zuber, K., Boretzky, K., Gasparic, I, Heil, M., Mayer, J., Heinz, A., Caesar, C., Kresan, D., Simon, H., Toernqvist, H. T., Koerper, D., Alkhazov, G., Atar, L., Aumann, T., Bemmerer, D., Bondarev, S., V, Bott, L. T., Chakraborty, S., Cherciu, M., I, Chulkov, L., V, Ciobanu, M., Datta, U., De Filippo, E., Douma, C. A., Dreyer, J., Elekes, Z., Enders, J., Galaviz, D., Geraci, E., Gnoffo, B., Goebel, K., Golovtsov, V. L., Diaz, D. Gonzalez, Gruzinsky, N., Heftrich, T., Heggen, H., Hehner, J., Hensel, T., Hoemann, E., Holl, M., Horvat, A., Horvath, A., Ickert, G., Malenica, D. Jelavic, Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kelic-Heil, A., Kempe, M., Koch, K., Kozlenko, N. G., Krivshich, A. G., Kurz, N., Kuznetsov, V, Langer, C., Leifels, Y., Lihtar, I, Loeher, B., Machado, J., Martorana, N. S., Miki, K., Nilsson, T., Orischin, E. M., Pagano, E., V, Pirrone, S., Politi, G., Potlog, P. M., Rahaman, A., Reifarth, R., Rigollet, C., Roeder, M., Rossi, D. M., Russotto, P., Savran, D., Scheit, H., Schindler, F., Stach, D., Stan, E., Gill, J. Stomvall, Teubig, P., Trimarchi, M., Uvarov, L., Volknandt, M., Volkov, S., Wagner, A., Wagner, V, Wranne, S., Yakorev, D., Zanetti, L., Zilges, A., and Zuber, K.

Abstract

NeuLAND (New Large-Area Neutron Detector) is the next-generation neutron detector for the (RB)-B-3 (Reactions with Relativistic Radioactive Beams) experiment at FAIR (Facility for Antiproton and Ion Research). NeuLAND detects neutrons with energies from 100 to 1000 MeV, featuring a high detection efficiency, a high spatial and time resolution, and a large multi-neutron reconstruction efficiency. This is achieved by a highly granular design of organic scintillators: 3000 individual submodules with a size of 5 x 5 x 250 cm(3) are arranged in 30 double planes with 100 submodules each, providing an active area of 250 x 250 cm(2) and a total depth of 3 m. The spatial resolution due to the granularity together with a time resolution of sigma(t) <= 150 ps ensures highresolution capabilities. In conjunction with calorimetric properties, a multi-neutron reconstruction efficiency of 50% to 70% for four-neutron events will be achieved, depending on both the emission scenario and the boundary conditions allowed for the reconstruction method. We present in this paper the final design of the detector as well as results from test measurements and simulations on which this design is based.

Published
2021

24. Isospin influence on the decay modes of the systems produced in the 78,86Kr +40,48Ca reactions at 10 AMeV

Author

Gnoffo B., Pirrone S., Politi G., La Commara M., Wieleczko J.P., De Filippo E., Russotto P., Trimarchi M., Vigilante M., Ademard G., Amorini F., Auditore L., Beck C., Bercenau I., Bonnet E., Borderie B., Cardella G., Chibihi A., Colonna M., D’Onofrio A., Frankland J.D., Geraci E., Henry E., La Guidara E., Lanzalone G., Lautesse P., Lebhertz D., LeNeidre N., Lombardo I., Mazurek K., Norella S., Pagano A., Pagano E.V., Papa M., Piasecki E., Porto F., Quattrocchi L., Quinlann M., Rizzo F., Shoroeder U., Spadaccini G., Trifirò A., Toke J., and Verde G.

Subjects
Physics, QC1-999
Abstract

The results of the analysis of the reactions 78,86Kr +40,48 Ca at 10 AMeV are presented. The experiment was performed at the INFN Laboratori Nazionali del Sud (LNS) in Catania by using the 4π multidetector CHIMERA, with beams delivered by the Superconductive Cyclotron. The competition among the various disintegration paths and in particular the isospin effects on the decay modes of the produced composite systems are investigated; this provides information about fundamental nuclear quantities such as level density, fission barrier and viscosity. Different isotopic composition and relative richness are observed among the reaction products of the two systems. An odd-even staggering effect is present in the charge distributions, in particular for the light fragments produced by the neutron-poor system. The kinematical characteristics of the IMF seem to indicate a high degree of the relaxation of the formed system. Besides, global features analysis seems to show some differences in the contribution arising from the various reaction mechanisms for the two reactions.

Published
2016
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25. Isospin influence on the decay modes of compound systems produced in the 78,86Kr + 40,48Ca at 10 AMeV

Author

Pirrone S., Politi G., Wieleczko J.P., De Filippo E., Gnoffo B., Russotto P., Trimarchi M., La Commara M., Vigilante M., Ademard G., Amorini F., Auditore L., Beck C., Berceanu I., Bonnet E., Borderie B., Cardella G., Chibihi A., Colonna M., D’Onofrio A., Frankland J. D., Geraci E., Henry E., La Guidara E., Lanzalone G., Lautesse P., Lebhertz D., Le Neindre N., Lombardo I., Mazurek K., Norella S., Pagano A., Pagano E.V., Papa M., Piasecki E., Porto F., Quattrocchi L., Quinlann M., Rizzo F., Schroeder W. U., Spadaccini G., Trifirò A., Toke J., and Verde G.

Subjects
Physics, QC1-999
Abstract

The study of the decay modes competition of the compound systems produced in the collisions 78Kr+40Ca and 86Kr+48Ca at 10AMeV is presented. In particular, the N/Z entrance channel influence on the decay paths of the compound systems, directly connected to the isospin influence, is investigated. The experiment was performed at the INFN Laboratori Nazionali del Sud (LNS) in Catania by using the 4π multi-detector CHIMERA. Charge, mass, angular distributions and kinematical features of the reaction products were studied. The analysis shows some differences in the contribution arising from the various reaction mechanisms for the neutron poor and neutron rich systems. Comparison with theoretical statistical and dynamical models are presented for the two systems. Besides a study of the influence of the energy on the entrance channel is performed for the 78Kr+40Ca reaction, by comparing the results of this experiment to those obtained for the same system at 5.5 AMeV with the INDRA device at GANIL.

Published
2016
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26. Study of two- and multi-particle correlations in 12C+24Mg and 12C+208Pb reactions at E=35 AMeV

Author

Quattrocchi L., Acosta L., Amorini F., Anzalone A., Auditore L., Berceanu I., Cardella G., Chbihi A., De Filippo E., Dell’ Aquila D., Francalanza L., Gnoffo B., Grzeszczuk A., Lanzalone G., Lombardo I., Martel I., Minniti T., Norella S., Pagano A., Pagano E.V., Papa M., Pirrone S., Politi G., Porto F., Rizzo F., Rosato E., Russotto P., Trifirò A., Trimarchi M., Verde G., Veselsky M., and Vigilante M.

Subjects
Physics, QC1-999
Abstract

Two and multi particle correlations from the decay of sources produced in 12C+24Mg and 12C+208Pb collisions at E=35 AMeV have been studied by using the forward part (1° < θlab < 30°) of the CHIMERA multi-detector. Correlations and invariant mass spectroscopy are used to explore simultaneous and sequential decays of resonances in light isotopes with Z∼3-6, produced in peripheral collisions via the break-up of excited quasi-projectiles. Among them we mention 5Li, 6Li, 6Be, 8Be and the astrophysically important state in 12C decaying into three alpha particles. Results and future perspectives at the INFN-LNS will be presented.

Published
2016
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27. Status and perspective of FARCOS: A new correlator array for nuclear reaction studies

Author

Pagano E.V., Acosta L., Auditore L., Boiano C., Cardella G., Castoldi A., D’Andrea M., Dell’aquila D., De Filippo E., De Luca S., Fichera F., Francalanza L., Giudice N., Gnoffo B., Grimaldi A., Guazzoni C., Lanzalone G., Lombardo I., Minniti T., Norella S., Pagano A., Papa M., Pirrone S., Politi G., Porto F., Quattrocchi L., Rizzo F., Russotto P., Saccá G., Trifirò A., Trimarchi M., Verde G., and Vigilante M.

Subjects
Physics, QC1-999
Abstract

The experimental investigation of Heavy Ion reactions at Fermi energies requires an accurate measurement of observables, such as linear momentum and energy of the detected particles. In order to address this problem, dedicated and flexible correlator arrays are useful tools to be coupled with 4π detectors. One of these arrays is FARCOS, presently under construction at the INFN Sezione di Catania and Laboratori Nazionali del Sud (LNS).

Published
2016
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28. Using CHIMERA detector at LNS for gamma-particle coincidences

Author

Cardella G., Acosta L., Auditore L., Chatterjiee M.B., Castoldi A., De Filippo E., Dell’Aquila D., De Luca S., Gnoffo B., Guazzoni C., Francalanza L., Lanzalone G., Lombardo I., Martorana N., Norella S., Pagano A., Pagano E.V., Papa M., Pirrone S., Politi G., Quattrocchi L., Rizzo F., Russotto P., Trifirò A., Trimarchi M., Verde G., and Vigilante M.

Subjects
Physics, QC1-999
Abstract

We have recently evaluated the quality of γ-ray angular distributions that can be extracted in particle-gamma coincidence measurements using the CHIMERA detector at LNS. γ-rays have been detected using the CsI(Tl) detectors of the spherical part of the CHIMERA array. Very clean γ-rays angular distributions were extracted in reactions induced by different stable beams impinging on 12C thin targets. The results evidenced an effect of projectile spin flip on the γ-rays angular distributions. γ-particle coincidence measurements were also performed in reactions induced by neutron rich exotic beams produced through in-flight fragmentation at LNS. In recent experiments also the Farcos array was used to improve energy and angular resolution measurements of the detected charged particles. Results obtained with both stable and radioactive beams are reported.

Published
2016
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29. Sensitivity of N/Z ratio in projectile break-up of isobaric systems

Author

De Filippo E., Pagano A., Russotto P., Acosta L., Auditore L., Baran V., Cap T., Cardella G., Colonna M., Francalanza L., Gnoffo B., Lanzalone G., Lombardo I., Marquínez-Durán G., Maiolino C., Minniti T., Norella S., Pagano E.V., Papa M., Piasecki E., Pirrone S., Politi G., Porto F., Quattrocchi L., Rizzo F., Rosato E., Trifirò A., Trimarchi M., Verde G., Vigilante M., Siwek-Wilczyńska K., and Wilczyński J.

Subjects
Physics, QC1-999
Abstract

The binary break-up of projectile-like fragments in non central heavy-ion collisions follows different decay patterns, from equilibrated emission towards dynamical (prompt) fission. Recently, comparing two systems with different N/Z in the entrance channel, it has been shown that the dynamical emission cross-section is enhanced for the most neutron rich system while the statistical emission cross-section is independent from the isotopic composition. In order to understand this dependence and disentangle it from the initial size of the nuclei, we have studied the two isobaric systems 124Xe+64 Zn and 124Xe+64 Ni at 35 A MeV (InKiIsSy experiment), in comparison with the previous studied reactions (124Sn +64 Ni and 112Sn +58 Ni) at the same bombarding energy. We present the first results evidencing a striking similar effect in the dynamical decay as a function of the N/Z of the target for equal size systems.

Published
2016
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30. Study of cluster structures in 10Be and 16C neutron-rich nuclei via break-up reactions

Author

Dell’Aquila D., Acosta L., Amorini F., Andolina R., Auditore L., Berceanu I., Cardella G., Chatterjiee M.B., De Filippo E., Francalanza L., Gnoffo B., Grzeszczuk A., Lanzalone G., Lombardo I., Martorana N., Minniti T., Pagano A., Pagano E.V., Papa M., Pirrone S., Politi G., Pop A., Porto F., Quattrocchi L., Rizzo F., Rosato E., Russotto P., Trifirò A., Trimarchi M., Verde G., and Vigilante M.

Subjects
Physics, QC1-999
Abstract

Projectile break-up reactions induced on polyethylene (CH2) target are used in order to study the spectroscopy of 10Be and 16C nuclei. For the present experiment we used 10Be and 16C beams delivered by the FRIBs facility at INFN-LNS, and the CHIMERA 4π multi-detector. 10Be and 16C structures are studied via a relative energy analysis of break-up fragments. The 4He+6He break-up channel allowed us to study the spectroscopy of 10Be; in particular we find evidence of a new state in 10Be at 13.5 MeV excitation energy. The 16C nucleus is studied via 6He-10Be correlation; we find the fingerprint of a possible state at about 20.6 MeV

Published
2016
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31. Widening the application range of the FARCOS frontend electronics

Author

Castoldi, A., Guazzoni, C., Sicari, V. L., Acosta, L., Auditore, L., de Luca, S., Norella, S., Trifiro, A., Trimarchi, M., Boiano, C., Cardella, G., D'Andrea, M., de Filippo, E., Favela, F., Fichera, F., Grimaldi, A., Librizzi, F., Pagano, A., Papa, M., Pirrone, S., Sacca, G., Salemi, G., Sciliberto, D., Geraci, E., Giudice, N., Gnoffo, B., Politi, G., Quattrocchi, L., Lanzalone, G., Maiolino, C., Pagano, E. V., Passaro, G., Russotto, P., Martorana, N. S., and Rizzo, F.

Subjects
Correlation , Conferences , Detectors , Telescopes , Tools , Dynamic range , Calibration, Dynamic range, sezele, Computer science, business.industry, Detector, Conferences, Detectors, Modular design, Correlation, Tools, Range (aeronautics), Calibration, Granularity, Electronics, business, Computer hardware, Telescopes
Abstract

FARCOS is a modular detection system intended to extend the capacity of 4π detectors both with higher granularity and resolution and with the ability to perform correlation measurements. The system, equipped at the present stage with the first 10 telescopes worked properly in the first experiments on beam paving the way to the construction of the remaining 10 telescopes that is presently under the way. To cope with the updated experimental cases FARCOS can investigate, we redesigned the frontend electronics board, widening the granularity of the selectable dynamic ranges and optimizing the slow control and calibration tools. In addition, we report on the successful commissioning of the FARCOS system.

Published
2020
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33. Narcos project for nuclear physics and applications

Author

Pagano, E. V., Auditore, L., Cardella, G., D'Andrea, M., de Filippo, E., Geraci, E., Gnoffo, B., Guazzoni, C., Grimaldi, A., Lanzalone, G., Maiolino, C., Martorana, N. S., Pagano, A., Papa, M., Passaro, G., Pirrone, S., Politi, G., Porto, F., Rizzo, F., Russotto, P., Sacca, G., and Trimarchi, M.

Subjects
sezele
Published
2020

34. Barrier distributions of the Mg24+Zr90,92 systems: Influence of energy dissipation

Author

Trzcińska, A., Piasecki, E., Cardella, G., Dell'Aquila, D., De Filippo, E., De Luca, S., Gnoffo, B., Kowalczyk, M., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Pagano, A., Pagano, E. V., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Trifiro, A., Trimarchi, M., and Vigilante, M.

Published
2020

35. The NArCoS Project: efficiency estimation and the cross talk problem studied through Monte Carlo simulations

Author

Pagano, E V, primary, Auditore, L, additional, Cardella, G, additional, Filippo, E De, additional, Geraci, E, additional, Gnoffo, B, additional, Lanzalone, G, additional, Maiolino, C, additional, Martorana, N S, additional, Pagano, A, additional, Papa, M, additional, Pirrone, S, additional, Politi, G, additional, Rizzo, F, additional, Russotto, P, additional, and Trimarchi, M, additional

Published
2020
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36. Isospin equilibration phenomenon and mid-rapidity IMF emission in the 48Ca +27 Al 40 MeV/nucleon collision

Author

Papa, M, primary, Acosta, L, additional, Cardella, G, additional, Filippo, E De, additional, Favela, F, additional, Geraci, E, additional, Gnoffo, B, additional, Lanzalone, G, additional, Maiolino, C, additional, Martorana, N S, additional, Pagano, A, additional, Pagano, E V, additional, Pirrone, S, additional, Politi, G, additional, Quattrocchi, L, additional, Rizzo, F, additional, Russotto, P, additional, Trifiro’, A, additional, and Trimarchi, M, additional

Published
2020
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37. Isospin Effect on fragment productions and reaction mechanisms for Ni+Ca systems at 25 AMeV

Author

Geraci, E, primary, Cardella, G, additional, Colonna, M, additional, De Filippo, E, additional, Gnoffo, B, additional, Lanzalone, G, additional, Lo Monaco, L, additional, Maiolino, C, additional, Martorana, N S, additional, Pagano, A, additional, Pagano, E V, additional, Papa, M, additional, Pirrone, S, additional, Politi, G, additional, Russotto, P, additional, Rizzo, F, additional, Trifiró, A, additional, Trimarchi, M, additional, Barlini, S, additional, Bougault, R, additional, Bruno, M, additional, Casini, G, additional, D’Agostino, M, additional, Gramegna, F, additional, Neindre, N Le, additional, Morelli, L, additional, and Piantelli, S, additional

Published
2020
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38. The γ decay of the Hoyle and higher excitation energy states of 12C

Author

Cardella, G., primary, Favela, F., additional, Martorana, N.S., additional, Acosta, L., additional, Auditore, L., additional, Camaiani, A., additional, Filippo, E. De, additional, Gelli, N., additional, Geraci, E., additional, Gnoffo, B., additional, Guazzoni, C., additional, Marìn-Làmbarri, J., additional, Lanzalone, G., additional, Maiolino, C., additional, Monaco, L. Lo, additional, Nannini, A., additional, Pagano, A., additional, Pagano, E.V., additional, Papa, M., additional, Pirrone, S., additional, Politi, G., additional, Pollacco, E., additional, Quattrocchi, L., additional, Rizzo, F., additional, Russotto, P., additional, Santonocito, D., additional, Sicari, V., additional, Trifiró, A., additional, and Trimarchi, M., additional

Published
2020
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39. The InKiIsSY experiment at LNS: A study of size vs. isospin effects with 124Xe+64Zn and 124,112Sn+64,58Ni reactions

Author

Quattrocchi L., Acosta L., Auditore L., Baran V., Cap T., Cardella G., Colonna M., De Filippo E., Francalanza L., Geraci E., Gnoffo B., Lanzalone G., Lombardo I., Maiolino C., Marquínez-Durán G., Morgana E., Minniti T., Norella S., Pagano A., Pagano E.V., Papa M., Piasecki E., Pirrone S., Politi G., Porto F., Rizzo F., Rosato E., Russotto P., Trifirò A., Trimarchi M., Verde G., Vigilante M., and Wilczynski J.

Subjects
Physics, QC1-999
Abstract

The systems 124Sn+64Ni and 112Sn+58Ni at 35 AMeV were analyzed in previous experiments, by using the 4π multi-detector CHIMERA in order to investigate the time-scale and mechanisms of fragments formation. By comparing the two systems, effects that have been correlated to Isospin transport in reaction dynamics and symmetry energy term of nuclear equation of state at sub-saturation density were found. Recently, in order to disentangle the Isospin effects from size effects the 124Xe+64Ni reaction was investigated at the same beam energy of 35 AMeV.

Published
2015
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40. The FARCOS project — Status and perspective

Author

Pagano E.V., Acosta L., Auditore L., Bassini R., Boiano C., Cardella G., Castoldi A., D’Andrea M., De Filippo E., Fichera F., Francalanza L., Giudice N., Gnoffo B., Grimaldi A., Guazzoni C., Lanzalone G., Lombardo I., Minniti T., Morgana E., Pagano A., Papa M., Passaro G., Pirrone S., Politi G., Porto F., Quattrocchi L., Rizzo F., Rosato E., Russotto P., Saccà G., Trifirò A., Trimarchi M., Verde G., and Vigilante M.

Subjects
Physics, QC1-999
Abstract

Nuclear matter under extreme conditions can be studied in the laboratory with heavy-ion collisions. In this case one can indeed vary the incident energy and explore different impact parameter and rapidity regions to access densities that extend above and below saturation. This opportunity allows one to learn about the nuclear equation of state and its implications in astrophysics phenomena such as supernovae explosions and neutron stars properties. All these phenomena involve time scales that need to be accessed with two- and multi-particle correlation measurements. In this contribution a brief report of the FARCOS array will be presented. In particular, tests with alpha sources and beams and preliminary results from a recent experiment INKIISSY performed using a FARCOS prototype made of four telescopes will be presented.

Published
2015
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41. On the 12C Hoyle state gamma decay

Author

Cardella, G., primary, Favela, F., additional, Martorana, N.S., additional, Acosta, L., additional, Auditore, L., additional, Camaiani, A., additional, De Filippo, E., additional, De Luca, S., additional, Gelli, N., additional, Geraci, E., additional, Gnoffo, B., additional, Guazzoni, C., additional, Marín-Lámbarri, D.J., additional, Lanzalone, G., additional, Maiolino, C., additional, Nannini, A., additional, Pagano, A., additional, Pagano, E.V., additional, Papa, M., additional, Pirrone, S., additional, Politi, G., additional, Pollacco, E., additional, Quattrocchi, L., additional, Rizzo, F., additional, Russo, A. D., additional, Russotto, P., additional, Santonocito, D., additional, Sicari, V., additional, Trifirò, A., additional, and Trimarchi, M., additional

Published
2020
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42. Gamma ray detection with CHIMERA at LNS: results and perspectives

Author

Cardella, G, primary, Favela, F, additional, Martorana, N S, additional, Acosta, L, additional, Andres, M V, additional, Camaiani, A, additional, De Filippo, E, additional, De Luca, S, additional, Gelli, N, additional, Geraci, E, additional, Gnoffo, B, additional, Guazzoni, C, additional, Marín-Lámbarri, D J, additional, Lanza, E G, additional, Lanzalone, G, additional, Maiolino, C, additional, Nannini, A, additional, Pagano, A, additional, Pagano, E V, additional, Papa, M, additional, Pirrone, S, additional, Politi, G, additional, Pollacco, E, additional, Quattrocchi, L, additional, Rizzo, F, additional, Russotto, P, additional, Santonocito, D, additional, Sicari, V, additional, Trifirò, A, additional, and Trimarchi, M, additional

Published
2020
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44. Isospin influence on the intermediate-Mass Fragments production at low energy

Author

Gnoffo, B., Pirrone, S., Politi, G., De Filippo, E., Russotto, P., Cardella, G., Favela, F., Geraci, E., Martorana, N. S., Pagano, A., Pagano, E. V., Piasecki, E., Quattrocchi, L., Rizzo, F., Trimarchi, M., and Trifiro, A.

Subjects
IDENTIFICATION, Physics and Astronomy (miscellaneous), Astronomy and Astrophysics
Published
2018

45. The NArCoS project

Author

Pagano, E. V., Auditore, L., Cardella, G., D'Andrea, M., De Filippo, E., Geraci, E., Gnoffo, B., Guazzoni, C., Grimaldi, A., Lanzalone, G., Maiolino, C., Martorana, N. S., Pagano, A., Papa, M., Pirrone, S., Politi, G., Porto, F., Rizzo, F., Russotto, P., Saccà, G., and Trimarchi, M.

Subjects
Physics and Astronomy (miscellaneous), PULSE-SHAPE DISCRIMINATION, Astronomy and Astrophysics, PULSE-SHAPE DISCRIMINATION, EJ 299-33, EJ 299-33
Published
2018

47. Signals of dynamical and statistical process from IMF-IMF correlation function

Author

Pagano, E. V., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., De Luca, S., De Filippo, E., Dell Aquila, D., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Norella, S., Pagano, A., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Siwek-Wilczyńska, K., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., Wilczyńsky, J., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Pagano, E. V., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., De Luca, S., De Filippo, E., Dell Aquila, D., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Norella, S., Pagano, A., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Siwek-Wilczyńska, K., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., and Wilczyńsky, J.

Subjects
Physics and Astronomy (miscellaneous), Astronomy and Astrophysic, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; In this paper we briefly discuss about a novel application of the IMFIMF correlation function to the physical case of binary massive projectile-like (PLF) splitting for dynamical and statistical breakup/fission in heavy ion collisions at Fermi energy. Theoretical simulations are also shown for comparisons with the data. These preliminary results have been obtained for the reverse kinematics reaction 124Sn+64Ni at 35 A MeV that was studied using the forward part of CHIMERA detector. In that reaction a strong competition between a dynamical and a statistical components and its evolution with the charge asymmetry of the binary break up was already shown. In this work we show that the IMF-IMF correlation function can be used to pin down the timescale of the fragments production in binary fission-like phenomena. We also made simulations with the CoMDII model in order to compare to the experimental IMF-IMF correlation function. In future we plan to extend these studies to different reaction mechanisms and nuclear systems and to compare with different theoretical transport simulations.

Published
2016
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48. Test of GET electronics for the CHIMERA and FARCOS multi-detectors

Author

De Luca, S., Acosta, L., Auditore, L., Boiano, C., Cardella, GIUSEPPE MICHELE OSVALDO, Castoldi, Andrea, D'Andrea, M., De Filippo, E., Dell'Aquila, D., Fichera, F., Gnoffo, B., Guazzoni, Chiara, Lanzalone, G., Lombardo, I., Martorana, N. S., Minniti, T., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Sacca', G., Trifiro', A., Trimarchi, M., Verde, G., Vigilante, M., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université 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), De Luca, S., Acosta, L., Auditore, L., Boiano, C., Cardella, G., Castoldi, A., D'Andrea, M., De Filippo, E., Dell'Aquila, D., Fichera, F., Gnoffo, B., Guazzoni, C., Lanzalone, G., Lombardo, I., Martorana, N. S., Minniti, T., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Quattrocchi, L., Rizzo, F., Russotto, P., Saccà, G., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.

Subjects
sezele, Physics and Astronomy (miscellaneous), analog-to-digital converter, Physics::Instrumentation and Detectors, electronics: readout, energy resolution, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Astronomy and Astrophysic, Nuclear Experiment, particle identification, electronics: design, time projection chamber
Abstract

International audience; In this paper we present the results of the tests on the new digital electronics GET (General Electronics for Tpc), which will be used for the readout of the CsI(Tl) detectors of CHIMERA (Charged Heavy Ion Mass and Energy Resolving Array) and for the new correlator FARCOS (Femtoscope ARray for COrrelations and Spectroscopy). The new electronics allows us to digitize the full waveform of the signals produced by the detector. Among its features it is worth noticing the compactness and low power consumption (5W for 256 channels). Tests have been performed with pulsers, radioactive sources and ion beams. With such electronics very good results in energy resolution and isotope separation of the detected fragments were obtained, by using both hardware and software filters.

Published
2016
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49. Study on the isospin equilibration phenomenon in nuclear reactions40Ca +40Ca,40Ca +46Ti,40Ca +48Ca,48Ca +48Ca at 25 MeV/nucleon by using the CHIMERA multidetector

Author

Martorana, N. S., Auditore, L., Berceanu, I., Cardella, G., Chatterjee, M. B., De Luca, S., De Filippo, E., Dell' Aquila, D., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Norella, S., Pagano, Angelo, Pagano, E. V., Papa, M., Pirrone, S., Politi, Giuseppe, Porto, F., Quattrocchi, L., Rizzo, Francesca, Russotto, P., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., Martorana, N. S., Auditore, L., Berceanu, I., Cardella, G., Chatterjee, M. B., De Luca, S., De Filippo, E., Dell Aquila, D., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Norella, S., Pagano, A., Pagano, E. V., Papa, M., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Russotto, P., Trifirò, A., Trimarchi, M., Verde, G., and Vigilante, M.

Subjects
Physics and Astronomy (miscellaneous), Astronomy and Astrophysic
Published
2016

50. Production cross sections for intermediate mass fragments from dynamical and statistical decay of projectile-like fragments in Sn 124 + Ni 64 and Sn 112 + Ni 58 collisions at 35 A MeV

Author

Russotto, P., De Filippo, E., Pagano, Angelo, Acosta, L., Auditore, Lucrezia, Baran, V., Berceanu, I., Borderie, B., Bougault, R., Bruno, M., Cap, T., Cardella, G., Cavallaro, S., Chatterjee, M. B., Chbihi, A., Colonna, M., D'Agostino, M., Di Toro, M., Francalanza, L., Frankland, J., Galichet, E., Gawlikowicz, W., Geraci, Elena Irene, Gnoffo, B., Grzeszczuk, A., Guazzoni, P., Kowalski, S., Lanzalone, G., Lanzanò, G., Le Neindre, N., Lombardo, I., Maiolino, C., Minniti, Triestino, Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Płaneta, R., Politi, Giuseppe, Porto, F., Quattrocchi, Lucia, Rivet, M. F., Rosato, E., Rizzo, Francesca, Schmidt, K., Siwek Wilczyńska, K., Skwira Chalot, I., Trifirò, A., Trimarchi, M. Verde G., Vigilante, M., Wieleczko, J. P., Wilczyński, J., Zetta, L., Zipper, W., Russotto, P. A, De Filippo, E. A, Pagano, A. A, Acosta, L. B, Auditore, L. C, Baran, V. D, Berceanu, I. E, Borderie, B. F, Bougault, R. G, Bruno, M. H, Cap, T. I, Cardella, G. A, Cavallaro, S. Bj, Chatterjee, M. B. K, Chbihi, A. L, Colonna, M. B, D'Agostino, M. H, Di Toro, M. Bj, Francalanza, L. Bj, Frankland, J. L, Galichet, E. Fm, Gawlikowicz, W. N, Geraci, E. Aj, Gnoffo, B. Aj, Grzeszczuk, A. O, Guazzoni, P. P, Kowalski, S. O, Lanzalone, G. Bq, Lanzanò, G. A, Le Neindre, N. G, Lombardo, Ivano, Maiolino, C. B, Minniti, T. A, Pagano, E. V. Bj, Papa, M. A, Piasecki, E. St, Pirrone, S. A, Płaneta, R. U, Politi, G. Aj, Porto, F. Bj, Quattrocchi, L. C, Rivet, M. F. F, Rosato, Elio, Rizzo, F. Bj, Schmidt, K. O, Siwek Wilczyńska, K. I, Skwira Chalot, I. I, Trifirò, A. C, Trimarchi, M. C, Verde, G. A, Vigilante, Mariano, Wieleczko, J. P. L, Wilczyński, J. T, Zetta, L. P, and Zipper, W. O.

Subjects
Nuclear and High Energy Physics
Abstract

Background: In heavy-ion collisions at intermediate energies the production of light charged particles and intermediate mass fragments (IMFs) is due to different reaction mechanisms and different time scales, ranging from fast dynamical processes to statistical emission from the equilibrated system. Purpose: We compare the IMF statistical and dynamical emission probabilities in collisions of a neutron-rich Sn124+Ni64 system and a neutron-poor Sn112+Ni58 system at the laboratory energy of 35 A MeV. Method: The IMFs production mechanism in semiperipheral reactions has been investigated in our previous works. In this paper, the analysis is expanded for the same set of data and production cross sections have been evaluated for dynamical and statistical emission in a coherent way for light and heavy fragments. Results: The data analysis has evidenced a strong competition between dynamical and statistical emission mechanisms. Probability of the dynamical emission of IMFs is strongly influenced by the (N/Z) ratio of the colliding system. Conclusions: It is demonstrated that the statistical emission is equally probable for the two systems, while the dynamical emission is enhanced for the neutron-rich system, especially for heavy fragments (Z≥6). The observed effect points at a high sensitivity of the prompt-dynamical emission to the (N/Z) ratio of a given system. © 2015 American Physical Society.

Published
2015

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