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7 results on '"25.70.Lm, 25.70.Mn"'

1. Isospin transport in 84Kr + 112,124Sn collisions at Fermi energies

Author

Barlini, S., Piantelli, S., Casini, G., Maurenzig, P.R., Olmi, A., Bini, M., Carboni, S., Pasquali, G., Poggi, G., Stefanini, A.A., Bougault, R., Bonnet, Eric, Borderie, B., Chbihi, A., Frankland, J.D., Gruyer, Diego, Lopez, O., Le Neindre, N., Pârlog, M., Rivet, M. F., Vient, E., Rosato, E., Spadaccini, G., Vigilante, M., Bruno, M., Marchi, T., Morelli, L., Cinausero, M., Degerlier, M., Gramegna, F., Kozik, T., Twarog, T., Alba, R., Maiolino, C., Santonocito, D., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), FAZIA, S., Barlini, S., Piantelli, G., Casini, P. R., Maurenzig, A., Olmi, M., Bini, S., Carboni, G., Pasquali, G., Poggi, Stefanini, A. A., R., Bougault, E., Bonnet, B., Borderie, A., Chbihi, J. D., Frankland, D., Gruyer, O., Lopez, N., Le Neindre, M., Parlog, M. F., Rivet, E., Vient, Rosato, Elio, Spadaccini, Giulio, Vigilante, Mariano, M., Bruno, T., Marchi, L., Morelli, M., Cinausero, M., Degerlier, F., Gramegna, T., Kozik, T., Twarog, R., Alba, C., Maiolino, D., Santonocito, S. Barlini, S. Piantelli, G. Casini, P. R. Maurenzig, A. Olmi, M. Bini, S. Carboni, G. Pasquali, G. Poggi, A. A. Stefanini, R. Bougault, E. Bonnet, B. Borderie, A. Chbihi, J. D. Frankland, D. Gruyer, O. Lopez, N. Le Neindre, M. Pârlog, M. F. Rivet, E. Vient, E. Rosato, G. Spadaccini, M. Vigilante, M. Bruno, T. Marchi, L. Morelli, M. Cinausero, M. Degerlier, F. Gramegna, T. Kozik, T. Twaróg, R. Alba, C. Maiolino, D. Santonocito, Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
NUCLEAR REACTIONS, Astrophysics::High Energy Astrophysical Phenomena, ISOSPIN, Nuclear Theory, Nucleus-nucleus collision, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], isotopic identification, Fermi energie, isospin diffusion isospin drift, ddc:530, 25.70.Lm, 25.70.Mn, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Isotopically resolved fragments with Z, 8 pages, 7 figures

Published
2013
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2. Aligned breakup of heavy nuclear systems as a new type of deep inelastic collisions at small impact parameters

Author

W. Zipper, F. Amorini, G. Cardella, L. Zetta, Z. Majka, M. Trimarchi, S. Pirrone, F. Rizzo, I. Skwira-Chalot, E. La Guidara, Maria Colonna, S. Cavallaro, E. De Filippo, C. Maiolino, P. Guazzoni, A. Anzalone, M. B. Chatterjee, M. Papa, K. Siwek-Wilczyńska, P. Russotto, E. Geraci, J. Brzychczyk, J. Wilczynski, F. Porto, E. Piasecki, K. Schmidt, R. Płaneta, Angelo Pagano, S. Kowalski, W. Gawlikowicz, J. Łukasik, M. Di Toro, V. Baran, Antonio Trifiro, G. Lanzalone, Ł. Świderski, N. G. Nicolis, A. Grzeszczuk, A. Sochocka, Lucrezia Auditore, G. Politi, J.P. Wieleczko, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Inelastic collision, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Inelastic scattering, Breakup, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, 25.70.Lm, 25.70.Mn, Impact parameter, Nuclear Experiment, 010306 general physics, Nucleon, Ternary operation
Abstract

An interesting process of violent reseparation of a heavy nuclear system into three or four fragments of comparable size was recently observed in {sup 197}Au+{sup 197}Au collisions at 15 MeV/nucleon. Combined analysis of the binary deep inelastic events and the ternary and quaternary breakup events demonstrates that the newly observed ternary and quaternary reactions belong to the same wide class of deep inelastic collisions as the conventional (binary) damped reactions. It is shown that the ternary and quaternary breakup reactions occur at extremely inelastic collisions corresponding to small impact parameters, while more peripheral collisions lead to well-known binary deep inelastic reactions.

Published
2010
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3. Observation of fast collinear partitioning of the 197Au + 197Au system into three and four fragments of comparable size

Author

Wilczynski, J., Skwira-Chalot, I., Siwek-Wilczynska, K., Pagano, A., Amorini, F., Anzalone, A., Auditore, L., Baran, V., Brzychczyk, J., Cardella, G., Cavallaro, S., B. Chatterjee, M., Colonna, M., De Filippo, E., Di Toro, M., Gawlikowicz, W., Geraci, 1e., Grzeszczuk, A., Guazzoni, P., Kowalski, S., La Guidara, E., Lanzalone, G., Łukasik, J., Maiolino, C., Majka, Z., G. Nicolis, N., Papa, M., Piasecki, E., Pirrone, S., Płaneta, R., Politi, G., Porto, F., Rizzo, F., Russotto, P., Schmidt, K., Sochocka, A., Swiderski, L., Trifiro, A., Trimarchi, M., Wieleczko, J.P., Zetta, L., Zipper, W., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
25.70.Lm, 25.70.Mn, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Collisions of a very heavy nonfusing nuclear system 197Au + 197Au were studied at an energy of 15MeV/ nucleon. An interesting process of violent reseparation of this heavy system into three or four fragments of comparable size was observed. In the case of ternary partitioning, either the projectile-like fragment (PLF) or target-like fragment (TLF) breaks up almost collinearly with the PLF-TLF separation axis. In the case of quaternary reactions, both PLF and TLF were observed breaking up along this direction. By comparison with a dynamical model of deep inelastic collisions it was concluded that the ternary and quaternary reactions occur in semiperipheral collisions, in a range of angular momenta corresponding to about 0.5–0.7 of the maximum L value for grazing collisions. The time elapsing from the scission of the binary PLF + TLF system to the secondary scission of PLF or TLF was estimated to be of about 70–80 fm/c for the ternary reactions and 80–100 fm/c for the quaternary reactions.

Published
2010
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4. Isospin transport effects in nuclear reactions at 25 MeV/nucleon

Author

Lombardo, I., Agodi, C., Alba, R., Amorini, F., Anzalone, A., Berceanu, I., Cardella, G., Cavallaro, S., Chatterjee, M. B., DE FILIPPO, E., DI PIETRO, A., Figuera, P., Geraci, Elena Irene, Giuliani, G., Grassi, L., Grzeszczuk, A., Han, J, Guidara, La, Lanzalone, E, G, Neindre, Le, Maiolino, N, Pagano, C, Papa, A, M, Pirrone, S., Politi, Giuseppe, Pop, A., Porto, F., Rizzo, Francesca, Russotto, P., Santonocito, D., Verde, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Isotopes of lithium, Hadron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Baryon, Isospin, 0103 physical sciences, 25.70.Lm, 25.70.Mn, Atomic physics, 010306 general physics, Nucleon, Isotopes of beryllium, Dimensionless quantity
Abstract

Isotopic effects are studied in reactions induced by {sup 40}Ca projectiles at 25 MeV/nucleon on {sup 40}Ca, {sup 48}Ca , and {sup 46}Ti targets. The N/Z contents of projectilelike and midvelocity (MV) sources are probed by means of isotopic ({sup 7}Li/{sup 6}Li and {sup 9}Be/{sup 7}Be) and isobaric ({sup 7}Li/{sup 7}Be) yield ratios, for semiperipheral events. In particular, information about isospin transport phenomena will be discussed. Isospin diffusion processes involving nuclei, which have noticeable differences in N/Z have been investigated. Signals of isospin drift, which are related to the gradient of density in the participant region, have also been observed for fragments emitted at MV.

Published
2010
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5. Fast ternary and quaternary breakup of the 197Au + 197Au system in collisions at 15 MeV/nucleon

Author

Skwira-Chalot, I., Siwek-Wilczynska, K., Wilczynski, J., Amorini, F., Anzalone, A., Auditore, L., Baran, V., Brzychczyk, J., Cardella, G., Cavallaro, S., B. Chatterjee, M., Colonna, M., De Filippo, E., Di Toro, M., Gawlikowicz, W., Geraci, E., Grzeszczuk, A., Guazzoni, P., Kowalski, S., La Guidara, E., Lanzalone, G., Lanzano, G., Lukasik, J., Maiolino, C., Majka, Z., G. Nicolis, N., Pagano, A., Piasecki, E., Pirrone, S., Planeta, R., Politi, G., Porto, F., Rizzo, F., Russotto, P., Schmidt, K., Sochocka, A., Swiderski, L., Trifiro, A., Trimarchi, M., Wieleczko, J.P., Zetta, L., Zipper, W., Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania = University of Catania (Unict), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), 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), Università degli studi di Catania [Catania], and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
25.70.Lm, 25.70.Mn, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Expérience au LNS; International audience; A new reaction mechanism of violent reseparation of a heavy nucleus-nucleus system, $^{197}$Au + $^{197}$Au, into three or four massive fragments in collisions at 15 MeV=nucleon has been observed. After reseparation, the fragments are almost exactly aligned, thus showing a very short time scale of the reseparation process, of about 70–80 fm=c.

Published
2009
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6. Dynamics of 'Binary' $^{197}$Au+$^{197}$Au Collisions as aTest of Energy Dissipation Mechanism

Author

Skwira-Chalot, I., Siwek-Wilczynska, K., Wilczynski, J., Amorini, F., Anzalone, A., Auditore, L., Baran, V., Blocki, J., Brzychczyk, J., Cardella, G., Cavallaro, S., Chatterjee, M.B., Colonna, M., de Filippo, E., Di Toro, M., Gawlikowicz, W., Grzeszczuk, A., Guazzoni, P., Kowalski, S., La Guidara, E., Lanzano, G., Lanzalone, G., Maiolino, C., Majka, Z., Nicolis, N.G., Pagano, A., Papa, M., Piasecki, E., Pirrone, S., Planeta, R., Politi, G., Porto, F., Rizzo, F., Russotto, P., Schmidt, K., Sochocka, A., Swiderski, L., Trifiro, A., Trimarchi, M., Wieleczko, J.P., Zetta, L., Zipper, W., Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), 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), CHIMERA, Università degli studi di Catania = University of Catania (Unict), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
25.70.Lm, 25.70.Mn, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; $^{197}$Au+$^{197}$Au collisions at 15 MeV/nucleon were studied using the multidetector array CHIMERA and heavy ion beams from the superconducting cyclotron of LNS Catania. The experiment was aimed at studying the mechanism of energy dissipation in collisions of very heavy systems. In the present contribution we report on a part of our study concentrated on a subject of basically binary damped collisions, in which only two main fragments are formed prior to secondary deexcitation processes. Such ``binary'' events were selected by using complete information from the exclusive-type data (including all Z$\geq$ 3 fragments) obtained with the CHIMERA multidetector. Results are compared with predictions of a classical dynamical model of Błocki et al., in which both scenarios of energy dissipation, one-body or two-body dissipation mechanisms, are assumed.

Published
2006

7. Neutron to proton ratios of quasiprojectiles and midrapidity emission in the 58Ni+58Ni reaction at 52 MeV/nucleon

Author

Thériault, D., Vallée, A., Gingras, L., Larochelle, Y., Roy, R., April, A., Beaulieu, L., Grenier, F., Lemieux, F., Moisan, J., Samri, M., St-Pierre, C., Turbide, S., Borderie, B., Bougault, R., Buchet, P., Charvet, J.L., Chbihi, A., Colin, J., Cussol, D., Dayras, R., Durand, D., Frankland, J.D., Galichet, E., Guinet, D., Guiot, B., Lautesse, P., Lecolley, J.F., Le Neindre, N., Lopez, O., Maskay, A.-M., Nalpas, L., Pârlog, M., Pawlowski, P., Rivet, M.F., Rosato, E., Steckmeyer, J.C., Tamain, B., Vient, E., Volant, C., Wieleczko, J.P., Yennello, S.J., Martin, E., Winchester, E., D., Thériault, A., Vallée, L., Gingra, Y., Larochelle, R., Roy, A., April, L., Beaulieu, F., Grenier, F., Lemieux, J., Moisan, M., Samri, C., St Pierre, S., Turbide, B., Borderie, R., Bougault, P., Buchet, J. L., Charvet, A., Chbihi, J., Colin, D., Cussol, R., Dayra, D., Durand, J. D., Frankland, E., Galichet, D., Guinet, B., Guiot, P., Lautesse, J. F., Lecolley, N., Le Neindre, O., Lopez, A. M., Maskay, L., Nalpa, M., Parlog, P., Pawlowski, M. F., Rivet, Rosato, Elio, J. C., Steckmeyer, B., Tamain, E., Vient, C., Volant, J. P., Wielezcko, S. J., Yennello, E., Martin, E., Winchester, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
nuclei with mass number 39 to 58, Nuclear Theory, Physics::Accelerator Physics, heavy ion-nucleus reactions, 25.70.Lm, 25.70.Mn, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Matière Nucléaire NIM; By combining data from a charged particle $^{58}$Ni+$^{58}$Ni experiment at 52 MeV/nucleon with an $^{36}$Ar+$^{58}$Ni experiment at 50 MeV/nucleon for which free neutrons have been detected, an increase in the neutron to proton ratio of the whole nuclear material at midrapidity has been experimentally observed in the reaction $^{58}$Ni+$^{58}$Ni at 52 MeV/nucleon. The neutron-to-proton ratio of the quasi-projectile emission is analyzed for the same reactions and is seen to decrease below the ratio of the initial system. Those observations suggest that an asymmetric exchange of neutrons and protons between the quasiprojectile and the midrapidity region exists.

Published
2005
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