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Wyszukujesz frazę "Di Toro, M." wg kryterium: Autor


Tytuł:
Correlations between emission timescale of fragments and isospin dynamics in ^{124}Sn+^{64}Ni and ^{112}Sn+^{58}Ni reactions at 35A MeV
Autorzy:
Lombardo, I.
Le Neindre, N.
D'Agostino, M.
Anzalone, A.
Wieleczko, J. P.
De Filippo, E.
Verde, G.
Gawlikowicz, W.
Vigilante, M.
Pop, A.
Lanzalone, G.
Bougault, R.
Skwira-Chalot, I.
Trimarchi, M.
Lanzanò, G.
Cavallaro, S.
Amorini, F.
Bruno, M.
Pagano, A.
Chatterjee, M. B.
Di Toro, M.
Frankland, J.
Pirrone, S.
Rizzo, F.
Geraci, E.
Wilczyński, J.
Płaneta, Roman
Auditore, L.
Galichet, E.
Porto, F.
Zipper, W.
Politi, G.
Cap, T.
La Guidara, E.
Russotto, P.
Berceanu, I.
Rosato, E.
Maiolino, C.
Rivet, M. F.
Chbihi, A.
Cardella, G.
Papa, M.
Schmidt, K.
Kowalski, S.
Zetta, L.
Siwek-Wilczyńska, K.
Trifirò, A.
Dayras, R.
Colonna, M.
Piasecki, E.
Borderie, B.
Guazzoni, P.
Baran, V.
Grzeszczuk, A.
Opis:
We present a new experimental method to correlate the isotopic composition of intermediate mass fragments (IMF) emitted at midrapidity in semiperipheral collisions with the emission timescale: IMFs emitted in the early stage of the reaction show larger values of ⟨N/Z⟩ isospin asymmetry, stronger angular anisotropies, and reduced odd-even staggering effects in neutron to proton ratio ⟨N/Z⟩ distributions than those produced in sequential statistical emission. All these effects support the concept of isospin “migration”, that is sensitive to the density gradient between participant and quasispectator nuclear matter, in the so called neck fragmentation mechanism. By comparing the data to a stochastic mean field (SMF) simulation we show that this method gives valuable constraints on the symmetry energy term of nuclear equation of state at subsaturation densities. An indication emerges for a linear density dependence of the symmetry energy.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Production cross sections for intermediate mass fragments from dynamical and statistical decay of projectile-like fragments in ^{124}Sn + ^{64}Ni and ^{112}Sn + ^{58}Ni collisions at 35A MeV
Autorzy:
Lanzanò, G.
Grzeszczuk, A.
Kowalski, S.
Berceanu, I.
Lanzalone, G.
Siwek-Wilczyńska, K.
Acosta, L.
Wieleczko, J. P.
Bruno, M.
Gawlikowicz, W.
Minniti, T.
Guazzoni, P.
Le Neindre, N.
Baran, V.
Piasecki, E.
Płaneta, Roman
D'Agostino, M.
Auditore, L.
Papa, M.
Maiolino, C.
Di Toro, M.
Cavallaro, S.
Borderie, B.
Rivet, M. F.
Schmidt, K.
Chatterjee, M. B.
Skwira-Chalot, I.
Trimarchi, M.
Cap, T.
Politi, G.
Rosato, E.
Verde, G.
Wilczyński, J.
Chbihi, A.
Zipper, W.
Cardella, G.
Pagano, E. V.
Rizzo, F.
Pagano, A.
Lombardo, I.
Colonna, M.
Gnoffo, B.
Porto, F.
De Filippo, E.
Pirrone, S.
Galichet, E.
Frankland, J.
Zetta, L.
Russotto, P.
Geraci, E.
Bougault, R.
Trifirò, A.
Vigilante, M.
Francalanza, L.
Quattrocchi, L.
Opis:
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 ^{124}Sn + ^{64}Ni system and a neutron-poor ^{112}Sn + ^{58}Ni 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.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The symmetry energy at suprasaturation density and the ASY-EOS experiment at GSI
Autorzy:
Al-Garawi, M.
Trautmann, W.
Lanzalone, G.
Isobe, T.
Mostazo, M.
Basrak, Z.
Ayyad, Y.
Auditore, L.
Al-Ajlan, A.
Zambon, P.
Chartier, M.
Heilborn, L.
Politi, G.
Rosato, E.
Sarantites, D. G.
Rossi, D.
Yennello, S.
Reviol, W.
Pirrone, S.
Łukasik, J.
Adamczyk, Marek
Caesar, C.
Leifels, Y.
Matthews, Z.
Gannon, S.
Pawłowski, P.
Guazzoni, C.
Zoric, M.
Winkelbauer, J.
Lynch, W. G.
Verde, G.
Chajecki, Z.
Chbihi, A.
Cardella, G.
Veselsky, M.
Fèvre, A. Le
Riccio, F.
Wu, P.
Aumann, T.
Famiano, M.
Wang, Yongjia
Zetta, L.
Russotto, P.
Trifirò, A.
Amorini, F.
Lemmon, R. C.
Li, Q. F.
Santoro, S.
Acosta, L.
Gašparić, I.
Sosin, Zbigniew
Al-Homaidhi, S.
Guazzoni, P.
Kurz, N.
Marini, P.
Guidara, E. La
Trimarchi, M.
Stuhl, L.
Pagano, E. V.
Kezzar, K.
Kiš, M.
Lombardo, I.
Budzanowski, A.
Pagano, A.
May, L.
Colonna, M.
Wieloch, Andrzej
Benlliure, J.
Vigilante, M.
Boisjoli, M.
Tsang, M. B.
Rizzo, F.
Lasko, Paweł
Wigg, P.
Filippo, E. De
Cammarata, P.
Toro, M. Di
Minniti, T.
Boretzky, K.
Papa, M.
Kupny, Sebastian
Czech, B.
Heil, M.
Simon, H.
Wolter, H. H.
Grassi, L.
Cozma, M. D.
Porto, F.
Brzychczyk, Janusz
Krasznahorkay, A.
Skwirczynska, I.
Introzzi, R.
Opis:
The ASY-EOS experiment at GSI laboratory measured the direct and elliptic flow of neutrons and light charged particles in the reaction $^{197}Au+^{197}Au$ at 400 A MeV incident energy. The ratio of elliptic flow of neutrons with respect to that of the light charged particles was used as main experimental observable to probe the density dependence of the symmetry energy term of the nuclear equation of state. Results, obtained by comparison of the experimental data with the UrQMD model predictions, strongly support a moderately soft to linear density dependence of the symmetry energy at suprasaturation densities below $2\rho _{0}$.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
The ASY-EOS experiment at GSI : investigating the symmetry energy at supra-saturation densities
Autorzy:
Al-Garawi, M.
Trautmann, W.
Lanzalone, G.
Isobe, T.
Mostazo, M.
Basrak, Z.
Ayyad, Y.
Auditore, L.
Al-Ajlan, A.
Zambon, P.
Chartier, M.
Heilborn, L.
Politi, G.
Rosato, E.
Boiano, C.
Rossi, D.
Yennello, S.
Pirrone, S.
Łukasik, J.
Adamczyk, Marek
Leifels, Y.
Matthews, Z.
Gannon, S.
Pawłowski, P.
Guazzoni, C.
Zoric, M.
Baran, V.
Lynch, W. G.
Verde, G.
Chajecki, Z.
Chbihi, A.
Cardella, G.
Veselsky, M.
Fèvre, A. Le
Riccio, F.
Li, Q.
Wu, P.
Aumann, T.
Famiano, M.
Zetta, L.
Russotto, P.
Trifirò, A.
Amorini, F.
Greco, V.
Lemmon, R. C.
Santoro, S.
Acosta, L.
Gašparić, I.
Sosin, Zbigniew
Al-Homaidhi, S.
Guazzoni, P.
Marini, P.
Kurz, N.
Guidara, E. La
Trimarchi, M.
Stuhl, L.
Kiš, M.
Kezzar, K.
Pagano, A.
Budzanowski, A.
Lombardo, I.
May, L.
Colonna, M.
Wieloch, Andrzej
Benlliure, J.
Vigilante, M.
Boisjoli, M.
Tsang, M. B.
Rizzo, F.
Lasko, Paweł
Wigg, P.
Filippo, E. De
Cammarata, P.
Toro, M. Di
Minniti, T.
Boretzky, K.
Papa, M.
Kupny, Sebastian
Czech, B.
Cozma, D.
Heil, M.
Simon, H.
Wolter, H. H.
Grassi, L.
Porto, F.
Reisdorf, W.
Brzychczyk, Janusz
Krasznahorkay, A.
Skwirczynska, I.
Reifarth, R.
Geraci, E.
Introzzi, R.
Opis:
The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich heavy-ions systems at intermediate energies has been proposed as an observable sensitive to the strength of the symmetry term in the nuclear Equation Of State (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for 197Au+197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model allowed a first estimate of the symmetry term of the EOS but suffer from a considerable statistical uncertainty. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI laboratory by the ASY-EOS collaboration in May 2011.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne

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