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1. The Fusion-by-Diffusion model as a tool to calculate cross sections for the production of superheavy nuclei

Author

Cap, T., Kowal, M., and Siwek-Wilczyńska, K.

Subjects
Nuclear Theory
Abstract

This article summarizes recent progress in our understanding of the reaction mechanisms leading to the formation of superheavy nuclei in cold and hot fusion reactions. Calculations are done within the Fusion-by-Diffusion (FBD) model using the new nuclear data tables by Jachimowicz et al. [At. Data Nucl. Data Tables 138, 101393 (2021)]. The synthesis reaction is treated in a standard way as a three-step process (i.e., capture, fusion, and survival). Each reaction step is analyzed separately. Model calculations are compared with selected experimental data on capture, fissionlike and fusion cross sections, fusion probabilities, and evaporation residue excitation functions. The role of the angular momentum in the fusion step is discussed in detail. A set of fusion excitation functions with corresponding fusion probabilities is provided for cold and hot synthesis reactions., Comment: submitted to EPJ A Topical Issue: Heavy and Super-Heavy Nuclei and Elements: Production and Properties

Published
2022
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2. Diffusion as a possible mechanism controlling the production of superheavy nuclei in cold fusion reactions

Author

Cap, T., Kowal, M., and Siwek-Wilczyńska, K.

Subjects
Nuclear Theory
Abstract

The fusion probability for the production of superheavy nuclei in cold fusion reactions was investigated and compared with recent experimental results for $^{48}$Ca, $^{50}$Ti, and $^{54}$Cr incident on a $^{208}$Pb target. Calculations were performed within the fusion-by-diffusion model (FbD) using new nuclear data tables by Jachimowicz et al. It is shown that the experimental data could be well explained within the framework of the FbD model. The saturation of the fusion probability at bombarding energies above the interaction barrier is reproduced. It emerges naturally from the physical effect of the suppression of contributions of higher partial waves in fusion reactions and is related to the critical angular momentum. The role of the difference in values of the rotational energies in the fusion saddle point and contact (sticking) configuration of the projectile-target system is discussed., Comment: submitted to PLB

Published
2021
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3. How to produce new superheavy nuclei?

Author

Siwek-Wilczyńska, K., Cap, T., and Kowal, M.

Subjects
Nuclear Theory
Abstract

Existing experimental facilities limit the possibilities for discovery of new nuclides to those synthesized with cross sections above 100 fb, but the perspectives for future high current accelerators could lower this limit by two orders of magnitude. Therefore, in the present work excitation functions for fusion-$xn$ evaporation reaction channels induced not only by $^{48}Ca$ but also by heavier projectiles (usually leading to smaller cross sections) on actinide targets were calculated in the framework of the fusion-by-diffusion (FBD) model. For the first time, in this approach, channels in which a proton ($pxn$) or alpha particle ($\alpha$$xn$) is evaporated have been included in the first step of the deexcitation cascade. To calculate the synthesis cross sections entry data such as fission barriers, ground-state masses, deformations and shell effects of the superheavy nuclei calculated in a consistent way within the Warsaw macroscopic-microscopic model were used. The only adjustable parameter of the FBD model is the injection point distance $s_{inj}$ and the value determined in our previous analysis of experimental cross sections for the synthesis of superheavy nuclei of Z=114-118 has been used. Excitation functions for the synthesis of selected (cross section above a few fb) new superheavies in the range of atomic numbers 112-120 are presented. Observation of 21 new heaviest isotopes is predicted. A realistic discussion of the FBD model uncertainties is presented for the first time.

Published
2018
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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. Freeze-out configuration properties in the 197Au + 197Au reaction at 23 AMeV

Author

Najman, R., Planeta, R., Sochocka, A., Amorini, F., Auditore, L., Cap, T., Cardella, G., De Filippo, E., Geraci, E., Grzeszczuk, A., Kowalski, S., Kozik, T., Lanzalone, G., Lombardo, I., Majka, Z., Nicolis, N. G., Pagano, A., Piasecki, E., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Siwek-Wilczynska, K., Skwira-Chalot, I., Trifiro, A., Trimarchi, M., Wilczynski, J., and Zipper, W.

Subjects
Nuclear Experiment
Abstract

Data from the experiment on the 197Au + 197Au reaction at 23 AMeV are analyzed with an aim to find signatures of exotic nuclear configurations such as toroid-shaped objects. The experimental data are compared with predictions of the ETNA code dedicated to look for such configurations and with the QMD model. A novel criterion of selecting events possibly resulting from the formation of exotic freeze-out configurations, "the efficiency factor", is tested. Comparison between experimental data and model predictions may indicate for the formation of flat/toroidal nuclear systems.

Published
2015
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6. DETERMINATION OF IMPACT PARAMETERS IN ALIGNED BREAKUP OF PROJECTILE-LIKE FRAGMENTS IN Au-197+Au-197 COLLISIONS AT 23 A MeV

Author

Cap, T, Siwek-Wilczynska, K, Wilczynski, J, Amorini, F, Auditore, L, Cardella, G, De Filippo, E, Geraci, E, Grassi, L, Grzeszczuk, A, La Guidara, E, Han, J, Kozik, T, Lanzalone, G, Lombardo, I, Najman, R, Nicolis, NG, Pagano, A, Papa, M, Piasecki, E, Pirrone, S, Planeta, R, Politi, G, Rizzo, F, Russotto, P, Skwira-Chalot, I, Trifiro, A, Trimarchi, M, Verde, G, and Zipper, W

Subjects
Nuclear & Particles Physics, Mathematical Sciences, Physical Sciences
Published
2016

7. Determination of Impact Parameters in Aligned Breakup of Projectile-like Fragments in $^{197}$Au + $^{197}$Au Collisions at 23$A$\,MeV

Author

Cap, T, Siwek-Wilczyńska, K, Wilczyński, J, Amorini, F, Auditore, L, Cardella, G, De Filippo, E, Geraci, E, Grassi, L, Grzeszczuk, A, La Guidara, E, Han, J, Kozik, T, Lanzalone, G, Lombardo, I, Najman, R, Nicolis, NG, Pagano, A, Papa, M, Piasecki, E, Pirrone, S, Płaneta, R, Politi, G, Rizzo, F, Russotto, P, Skwira-Chalot, I, Trifiró, A, Trimarchi, M, Verde, G, and Zipper, W

Subjects
Mathematical Sciences, Physical Sciences, Nuclear & Particles Physics
Published
2016

8. Calculations of the cross sections for synthesis of new {293-296}118 isotopes in {249-252}Cf(48Ca,xn) reactions

Author

Cap, T., Siwek-Wilczynska, K., Kowal, M., and Wilczynski, J.

Subjects
Nuclear Theory
Abstract

A project of using a target consisting of the mixture of (249-252)Cf isotopes to be bombarded with the 48Ca beam, aimed to synthesize new isotopes of the heaviest known element Z = 118, is under way at the FLNR in Dubna. In the present work excitation functions for all the reactions: 249Cf(48Ca,xn)(297-x)118, 250Cf(48Ca,xn)(298-x)118, 251Cf(48Ca,xn)(299-x)118 and 252Cf(48Ca,xn)(300-x)118 have been calculated in the framework of the fusion-by-diffusion model, assuming fission barriers, ground-state masses and shell effects of the superheavy nuclei predicted by Kowal et al. Energy dependence of the effective cross sections for the synthesis of selected new isotopes: (293)118, (294)118, (295)118 and (296)118 is predicted for the particular isotopic composition of the Cf target prepared for the Dubna experiment., Comment: 5 pages, 2 figures

Published
2013
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9. Correlations between emission timescale of fragments and isospin dynamics in $^{124}$Sn+$^{64}$Ni and $^{112}$Sn+$^{58}$Ni reactions at 35 AMeV

Author

De Filippo, E., Pagano, A., Russotto, P., Amorini, F., Anzalone, A., Auditore, L., 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., Dayras, R., Di Toro, M., Frankland, J., Galichet, E., Gawlikowicz, W., Geraci, E., Grzeszczuk, A., Guazzoni, P., Kowalski, S., La Guidara, E., Lanzalone, G., Lanzanò, G., Neindre, N. Le, Lombardo, I., Maiolino, C., Papa, M., Piasecki, E., Pirrone, S., Planeta, R., Politi, G., Pop, A., Porto, F., Rivet, M. F., Rizzo, F., Rosato, E., Schmidt, K., Siwek-Wilczynska, K., Skwira-Chalot, I., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., Wieleczko, J. P., Wilczynski, J., Zetta, L., and Zipper, W.

Subjects
Nuclear Experiment
Abstract

We present a new experimental method to correlate the isotopic composition of intermediate mass fragments (IMF) emitted at mid-rapidity in semi-peripheral 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 quasi-spectator 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., Comment: 17 pages, 7 figures; submitted to Physical Rev. C

Published
2012
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10. Predictions of the FBD model for the synthesis cross sections of Z = 114-120 elements based on macroscopic-microscopic fission barriers

Author

Siwek-Wilczynska, K., Cap, T., Kowal, M., Sobiczewski, A., and Wilczynski, J.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

A complete set of existing data on hot fusion reactions leading to synthesis of superheavy nuclei of Z =114-118, obtained in a series of experiments in Dubna and later in GSI Darmstadt and LBNL Berkeley, was analyzed in terms of a new angular-momentum dependent version of the Fusion by Diffusion (FBD) model with fission barriers and ground-state masses taken from the Warsaw macroscopic-microscopic model (involving non-axial shapes) of Kowal et al. The only empirically adjustable parameter of the model, the injection-point distance (sinj), has been determined individually for all the reactions and very regular systematics of this parameter have been established. The regularity of the obtained sinj systematics indirectly points at the internal consistency of the whole set of fission barriers used in the calculations. Having fitted all the experimental excitation functions for elements Z = 114-118, the FBD model (with the new sinj systematics) was used to predict cross sections for synthesis of elements Z = 119 and 120. Regarding prospects to produce the new element Z = 119, our calculations prefer the 252Es(48Ca,xn)300-x119 reaction, for which the synthesis cross section of about 0.2 pb in 4n channel at Ec.m.= 220 MeV is expected. The most favorable reaction to synthesize the element Z = 120 turns out to be 249Cf(50Ti,xn)299-x120, but the predicted cross section for this reaction is only 6 fb (for 3n and 4n channels).

Published
2012
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11. Nuclear neck-density determination at Fermi energy with CHIMERA detector

Author

Pagano, A., De Filippo, E., Geraci, E., Pagano, E. V., Russotto, P., Siwek-Wilczyńska, K., Acosta, L., Auditore, L., Cap, T., Cardella, G., Chatterjee, M. B., Colonna, M., Gnoffo, B., Favela, F., Lanzalone, G., Maiolino, C., Martorana, N. S., Papa, M., Pirrone, S., Politi, G., Piasecki, E., Quattrocchi, L., Rizzo, F., Trifirò, A., and Trimarchi, M.

Published
2020
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12. Dynamical versus statistical 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., Geraci, E., 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.

Published
2020
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14. Captain's Table: The passing of two industry giants

Author

Bernstein, Cap T. Alan

Subjects
Passenger ships, Shipping industry, Transportation industry
Abstract

The maritime industry is made up of many individuals whose personalities are larger than life. Two of them passed away suddenly late last year, leaving a void in our industry [...]

Published
2023

16. 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

18. 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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19. Study of the scattering of 15C at energies around the Coulomb barrier.

Author

Consejo Superior de Investigaciones Científicas (España), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), Fundação para a Ciência e a Tecnologia (Portugal), European Commission, Universidad Nacional Autónoma de México, Ovejas, J. D., Knyazev, A., Martel, Ismael, Tengblad, Olof, García Borge, María José, Cederkall, J., Keeley, N., Rusek, K., García-Ramos, C., Pérez, T., Acosta, L.A., Arokiaraj, A.A., Babo, M., Cap, T., Ceylan, N., Angelis, G. de, Pietro, A. di, Fernández, J.P., Figuera, P., Fraile, Luis M., Fynbo, H., Galaviz, D., Jensen, J.H., Jonson, B., Kotak, R., Kurtukian-Nieto, T., Madurga, Miguel, Marquínez-Durán, G., Munch, M., Orduz, A.K., Honório, R., Pakou, A., Peralta, L., Perea, Ángel, Raabe, R., Renaud, M., Riisager, K., Sánchez-Benítez, A.M., Sánchez-Segovia, J., Sgouros, O., Soukeras, V., Teubig, P., Víñals, S., Wolinska-Cichocka, M., Wolski, R., Yang, J., Consejo Superior de Investigaciones Científicas (España), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), Fundação para a Ciência e a Tecnologia (Portugal), European Commission, Universidad Nacional Autónoma de México, Ovejas, J. D., Knyazev, A., Martel, Ismael, Tengblad, Olof, García Borge, María José, Cederkall, J., Keeley, N., Rusek, K., García-Ramos, C., Pérez, T., Acosta, L.A., Arokiaraj, A.A., Babo, M., Cap, T., Ceylan, N., Angelis, G. de, Pietro, A. di, Fernández, J.P., Figuera, P., Fraile, Luis M., Fynbo, H., Galaviz, D., Jensen, J.H., Jonson, B., Kotak, R., Kurtukian-Nieto, T., Madurga, Miguel, Marquínez-Durán, G., Munch, M., Orduz, A.K., Honório, R., Pakou, A., Peralta, L., Perea, Ángel, Raabe, R., Renaud, M., Riisager, K., Sánchez-Benítez, A.M., Sánchez-Segovia, J., Sgouros, O., Soukeras, V., Teubig, P., Víñals, S., Wolinska-Cichocka, M., Wolski, R., and Yang, J.

Abstract

The neutron rich carbon isotope 15C is the only known case of an almost "pure" 2s1/2 single-neutron halo ground state configuration. At collision energies around the Coulomb barrier the reaction dynamics is expected to be dominated by single neutron transfer and breakup. To investigate these effects, we have measured the scattering of 15C with a 208Pb target at 65 MeV at the HIE-ISOLDE facility in CERN (Geneva, Switzerland). The preliminary data demonstrates the presence of a strong long-range absorption pattern in the angular distribution of the elastic cross section. The results are discussed in the framework of Optical Model calculations.

Published
2020

20. Halo effects in the low-energy scattering of 15C with heavy targets

Author

European Organization for Nuclear Research, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Ovejas, J. D., Knyazev, A., Martel, Ismael, Tengblad, Olof, García Borge, María José, Cederkäll, J., Keeley, N., Rusek, K., García-Ramos, C., Acosta, L.A., Arokiaraj, A.A., Babo, M., Cap, T., Ceylan, N., Angelis, G. de, Pietro, A. di, Fernández, J.P., Figuera, P., Fraile, Luis M., Fynbo, H., Galaviz, D., Jensen, J.H., Jonson, B., Kotak, R., Kurtukian-Nieto, T., Madurga, Miguel, Marquínez-Durán, G., Munch, M., Orduz, A.K., Honório, R., Pakou, A., Pérez, T., Peralta, L., Perea, Ángel, Raabe, R., Renaud, M., Riisager, K., Sánchez-Benítez, A.M., Sánchez-Segovia, J., Sgouros, O., Soukeras, V., Teubig, P., Viñals, S., Wolinska-Cichocka, M., Wolski, R., Yang, J., European Organization for Nuclear Research, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Ovejas, J. D., Knyazev, A., Martel, Ismael, Tengblad, Olof, García Borge, María José, Cederkäll, J., Keeley, N., Rusek, K., García-Ramos, C., Acosta, L.A., Arokiaraj, A.A., Babo, M., Cap, T., Ceylan, N., Angelis, G. de, Pietro, A. di, Fernández, J.P., Figuera, P., Fraile, Luis M., Fynbo, H., Galaviz, D., Jensen, J.H., Jonson, B., Kotak, R., Kurtukian-Nieto, T., Madurga, Miguel, Marquínez-Durán, G., Munch, M., Orduz, A.K., Honório, R., Pakou, A., Pérez, T., Peralta, L., Perea, Ángel, Raabe, R., Renaud, M., Riisager, K., Sánchez-Benítez, A.M., Sánchez-Segovia, J., Sgouros, O., Soukeras, V., Teubig, P., Viñals, S., Wolinska-Cichocka, M., Wolski, R., and Yang, J.

Abstract

The neutron-rich carbon isotope C was postulated to be a halo nucleus (S = 1215 keV, S = 9395 keV) according to different high-energy experiments. If so, it would be the only halo nucleus exhibiting a "pure" s-wave structure of the ground state. At low collision energies, the effect of this halo structure should manifest as a strong absorption pattern in the angular distribution of the elastic cross section, with a total suppression of the nuclear rainbow due to the large neutron transfer and breakup probabilities, enhanced by the halo configuration. The IS619 experiment, carried out at the HIE-ISOLDE facility at CERN (Switzerland), is the first dynamical study of this nucleus at energies around the Coulomb barrier. It aims to probe the halo structure via the measurement of the elastic cross section on a high-Z Pb target. Preliminary results of the elastic cross section are discussed and compared to Optical Model calculations.

Published
2020

22. Study of the scattering of 15C at energies around the Coulomb barrier

Author

Ovejas, J D, primary, Knyazev, A, additional, Martel, I, additional, Tengblad, O, additional, Borge, M J G, additional, Cederkall, J, additional, Keeley, N, additional, Rusek, K, additional, García-Ramos, C, additional, Pérez, T, additional, Acosta, L A, additional, Arokiaraj, A A, additional, Babo, M, additional, Cap, T, additional, Ceylan, N, additional, Angelis, G De, additional, Pietro, A Di, additional, Fernández, J P, additional, Figuera, P, additional, Fraile, L, additional, Fynbo, H, additional, Galaviz, D, additional, Jensen, J H, additional, Jonson, B, additional, Kotak, R, additional, Kurtukian, T, additional, Madurga, M, additional, Marquínez-Durán, G, additional, Munch, M, additional, Orduz, A K, additional, Honório, R, additional, Pakou, A, additional, Peralta, L, additional, Perea, A, additional, Raabe, R, additional, Renaud, M, additional, Riisager, K, additional, Sánchez-Benítez, A M, additional, Sánchez-Segovia, J, additional, Sgouros, O, additional, Soukeras, V, additional, Teubig, P, additional, Viñals, S, additional, Wolinska-Cichocka, M, additional, Wolski, R, additional, and Yang, J, additional

Published
2020
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23. 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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24. Polar-side emission of heavy IMFs in 197Au + 197Au collisions at 23A MeV

Author

Cap T., Siwek-Wilczyńska K., Skwira-Chalot I., Wilczyński J., Amorini F., Auditore L., Cardella G., De Filippo E., Geraci E., Grassi L., Grzeszczuk A., La Guidara E., Han J., Kozik T., Lanzalone G., Lombardo I., Najman R., Nicolis N. G., Pagano A., Papa M., Piasecki E., Pirrone S., Płaneta R., Politi G., Rizzo F., Russotto P., Trifirò A., Trimarchi M., Verde G., and Zipper W.

Subjects
Physics, QC1-999
Published
2015
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25. Halo Effects in the Low-energy Scattering of \(^{15}\)C with Heavy Targets

Author

Ovejas, J.D., primary, Knyazev, A., additional, Martel, I., additional, Tengblad, O., additional, Borge, M.J.G., additional, Cederkäll, J., additional, Keeley, N., additional, Rusek, K., additional, García-Ramos, C., additional, Acosta, L.A., additional, Arokiaraj, A.A., additional, Babo, M., additional, Cap, T., additional, Ceylan, N., additional, de Angelis, G., additional, Di Pietro, A., additional, Fernández, J.P., additional, Figuera, P., additional, Fraile, L., additional, Fynbo, H., additional, Galaviz, D., additional, Jensen, J.H., additional, Jonson, B., additional, Kotak, R., additional, Kurtukian, T., additional, Madurga, M., additional, Marquínez-Durán, G., additional, Munch, M., additional, Orduz, A.K., additional, Honório, R., additional, Pakou, A., additional, Pérez, T., additional, Peralta, L., additional, Perea, A., additional, Raabe, R., additional, Renaud, M., additional, Riisager, K., additional, Sánchez-Benítez, A.M., additional, Sánchez-Segovia, J., additional, Sgouros, O., additional, Soukeras, V., additional, Teubig, P., additional, Viñals, S., additional, Wolińska-Cichocka, M., additional, Wolski, R., additional, and Yang, J., additional

Published
2020
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27. Probing the symmetry energy at low density using observable from neck fragmentation

Author

De Filippo E., Acosta L., Agodi C., Amorini F., Auditore L., Baran V., Berceanu I., Cap T., Cardella G., Colonna M., Francalanza L., Geraci E., Gianì R., Grassi L., Grzeszczuk A., Guazzoni P., Han J., La Guidara E., Lanzalone G., Lombardo I., Maiolino C., Minniti T., Pagano A., Pagano E.V., Papa M., Piasecki E., Płaneta R., Pirrone S., Politi G., Pop A., Porto F., Quattrocchi L., Rizzo F., Rosato E., Russotto P., Siwek-Wilczyńska K., Skwira-Chalot I, Trifirò A., Trimarchi M., Verde G., Vigilante M., Wilczyński J., and Zetta L.

Subjects
Physics, QC1-999
Abstract

Semi-peripheral collisions of 64Ni + 124Sn in direct and inverse kinematics, at 35 A MeV incident energy, are studied to characterize the dynamical origin and align-ments properties of fragments emission at midrapidity. This emission is partly due to the fragmentation of a transient neck joining the projectile and target in the early stages of the reaction. Recently we exploited observable from neck fragmentation to constraint the density dependence of the symmetry energy. In this contribution we focus on the density evolution of the mid-rapidity source. An experimental survey is suggested to check if data are consistent with the formation of neck fragments in a dilute density region in contact with the projectile-like and target-like spectators at normal saturation density.

Published
2014
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28. How to produce new superheavy nuclei?

Author

Siwek-Wilczy��ska, K., Cap, T., and Kowal, M.

Subjects
Nuclear Theory (nucl-th), Nuclear Theory, FOS: Physical sciences
Abstract

Existing experimental facilities limit the possibilities for discovery of new nuclides to those synthesized with cross sections above 100 fb, but the perspectives for future high current accelerators could lower this limit by two orders of magnitude. Therefore, in the present work excitation functions for fusion-$xn$ evaporation reaction channels induced not only by $^{48}Ca$ but also by heavier projectiles (usually leading to smaller cross sections) on actinide targets were calculated in the framework of the fusion-by-diffusion (FBD) model. For the first time, in this approach, channels in which a proton ($pxn$) or alpha particle ($\alpha$$xn$) is evaporated have been included in the first step of the deexcitation cascade. To calculate the synthesis cross sections entry data such as fission barriers, ground-state masses, deformations and shell effects of the superheavy nuclei calculated in a consistent way within the Warsaw macroscopic-microscopic model were used. The only adjustable parameter of the FBD model is the injection point distance $s_{inj}$ and the value determined in our previous analysis of experimental cross sections for the synthesis of superheavy nuclei of Z=114-118 has been used. Excitation functions for the synthesis of selected (cross section above a few fb) new superheavies in the range of atomic numbers 112-120 are presented. Observation of 21 new heaviest isotopes is predicted. A realistic discussion of the FBD model uncertainties is presented for the first time.

Published
2018

29. Global characteristics of 197Au + 197Au collisions at 23 AMeV

Author

Bubak A., Auditore L., Amorini F., Sochocka A., Płaneta R., Najman R., Cap T., Cardella G., De Filippo E., Geraci E., Grassi L., Grzeszczuk A., La Guidara E., Han J., Loria D., Kowalski S., Kozik T., Lanzalone G., Lombardo I., Majka Z., Nicolis N. G., Pagano A., Piasecki E., Pirrone S., Politi G., Rizzo F., Russotto P., Siwek-Wilczyéska K., Skwira-Chalot I., Trifiró A., Trimarchi M., Wilczyński J., Verde G., and Zipper W.

Subjects
Physics, QC1-999
Abstract

We present the current status of nuclear dynamics studies performed by the BREAKUP group with the 4π CHIMERA array, for the system 197Au + 197Au at 23 AMeV.

Published
2012
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31. Competition Between Dynamical and Sequential Reaction Channels in $^{197}$Au+$^{197}$Au Collisions at a Bombarding Energy of 23$A$ MeV

Author

Cap, T., primary, Siwek-Wilczyńska, K., additional, Wilczyński, J., additional, Auditore, L., additional, Cardella, G., additional, De Filippo, E., additional, Geraci, E., additional, Grzeszczuk, A., additional, La Guidara, E., additional, Gnoffo, G., additional, Kozik, T., additional, Lanzalone, G., additional, Lombardo, I., additional, Martorama, M., additional, Najman, R., additional, Nicolis, N.G., additional, Pagano, A., additional, Pagano, E.V., additional, Papa, M., additional, Piasecki, E., additional, Pirrone, S., additional, Płaneta, R., additional, Politi, G., additional, Rizzo, F., additional, Russotto, P., additional, Skwira-Chalot, I., additional, Trifiró, A., additional, Trimarchi, M., additional, Verde, G., additional, and Zipper, W., additional

Published
2019
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32. 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

33. Sensitivity to N/Z ratio in fragment productions for the isobaric systems 124Xe+64Zn, 64Ni and 124Sn+64Ni at E/A = 35 MeV

Author

De Filippo, E., Pagano, A., Russotto, P., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Norella, S., Pagano, E. V., 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., Vigilante, M., Wilczyński, J., De Filippo, E., Pagano, A., Russotto, P., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Norella, S., Pagano, E. V., 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., Vigilante, M., and Wilczyński, J.

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

34. The InKiIsSy experiment at LNS: A study of size vs. isospin effects with124Xe +64Zn,64Ni reactions at 35 A MeV

Author

Norella, S., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., De Filippo, E., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Siwek-Wilczynska, K., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., Wilczyński, J., Norella, S., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., De Filippo, E., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, L., Rizzo, F., Rosato, E., Russotto, P., Siwek-Wilczynska, K., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., and Wilczyński, J.

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

35. 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

36. HALO EFFECTS IN THE LOW-ENERGY SCATTERING OF 15C WITH HEAVY TARGETS.

Author

OVEJAS, J. D., KNYAZEV, A., MARTEL, I., TENGBLAD, O., BORGE, M. J. G., CEDERKÄLL, J., KEELEY, N., RUSEK, K., GARCÍA-RAMOS, C., ACOSTA, L. A., AROKIARAJ, A. A., BABO, M., CAP, T., CEYLAN, N., DE ANGELIS, G., DI PIETRO, A., FERNÁNDEZ, J. P., FIGUERA, P., FRAILE, L., and FYNBO, H.

Subjects
CARBON isotopes, NEUTRONS, RAINBOWS
Abstract

The neutron-rich carbon isotope 15C was postulated to be a halo nucleus (Sn = 1215 keV, S2n = 9395 keV) according to different high-energy experiments. If so, it would be the only halo nucleus exhibiting a “pure” s-wave structure of the ground state. At low collision energies, the effect of this halo structure should manifest as a strong absorption pattern in the angular distribution of the elastic cross section, with a total suppression of the nuclear rainbow due to the large neutron transfer and breakup probabilities, enhanced by the halo configuration. The IS619 experiment, carried out at the HIE-ISOLDE facility at CERN (Switzerland), is the first dynamical study of this nucleus at energies around the Coulomb barrier. It aims to probe the halo structure via the measurement of the elastic cross section on a high-Z 208Pb target. Preliminary results of the elastic cross section are discussed and compared to Optical Model calculations. [ABSTRACT FROM AUTHOR]

Published
2020
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37. Statistical against dynamical PLF fission as seen by the IMF-IMF correlation functions and comparisons with CoMD model

Author

Pagano, E.V., primary, Acosta, L., additional, Auditore, L., additional, Cap, T., additional, Cardella, G., additional, Colonna, M., additional, De Filippo, E., additional, Geraci, E., additional, Gnoffo, B., additional, Lanzalone, G., additional, Maiolino, C., additional, Martorana, N., additional, Pagano, A., additional, Papa, M., additional, Piasecki, E., additional, Pirrone, S., additional, Politi, G., additional, Porto, F., additional, Quattrocchi, L., additional, Rizzo, F., additional, Russotto, P., additional, Trifiro’, A., additional, Trimarchi, M., additional, and Siwek-Wilczynska, K., additional

Published
2018
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38. Signals for dynamical process from IMF-IMF correlation function

Author

Pagano, Emanuele Vincenzo, primary, Acosta, L, additional, Auditore, L, additional, Cap, T, additional, Cardella, G, additional, Casolino, M., additional, De Filippo, E, additional, Geraci, E, additional, Gnoffo, B, additional, Lanzalone, G, additional, Maiolino, C, additional, Martorana, N, additional, Pagano, A, additional, Papa, M, additional, Piasecki, E, additional, Pirrone, S, additional, Politi, G, additional, Porto, F, additional, Quattrocchi, L, additional, Rizzo, F, additional, Russotto, P, additional, Trifiro, A, additional, Trimarchi, M, additional, and Siwek Wilczynska, K, additional

Published
2017
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39. Sensitivity to N/Z ratio in fragment productions for the isobaric systems Xe-124

Author

De Filippo, E, Pagano, Angelo, Russotto, P, Acosta, L, Auditore, L, Baran, V, Cap, T, Cardella, G, Colonna, M, Dell'Aquila, D, De Luca, S, Francalanza, L, Gnoffo, B, Lanzalone, G, Lombardo, I, Maiolino, C, Martorana, Ns, Minniti, T, Norella, S, Pagano, Ev, Papa, M, Piasecki, E, Pirrone, S, Politi, Giuseppe, Porto, F, Quattrocchi, L, Rizzo, Francesca, Rosato, E, Siwek Wilczynska, K, Trifiro, A, Trimarchi, M, Verde, G, Vigilante, M, and Wilczynski, J.

Published
2016

40. The InKiIsSy experiment at LNS: A study of size vs. isospin effects with Xe-124

Author

Norella, S., Acosta, L., Auditore, L., Baran, V., Cap, T., Cardella, G., Colonna, M., De Filippo, E., Dell'Aquila, D., De Luca, S., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, T., Pagano, Angelo, Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, Giuseppe, Porto, F., Quattrocchi, L., Rizzo, Francesca, Rosato, E., Russotto, P., Siwek Wilczynska, K., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., and Wilczynski, J.

Published
2016

41. The InKiIsSy experiment at LNS: A study of size vs isospin effects with 124Xe+64Zn,64Ni reactions at 35 AMeV

Author

Norella, S., Acosta, L., Auditore, Lucrezia, Baran, V., Cap, T., Cardella, G., Colonna, M., De Filippo, E., Dell'Aquila, D., DE LUCA, Saverio, Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Minniti, Triestino, Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, Lucia, Rizzo, F., Rosato, E., Russotto, P., Siwek Wilczynska, K., Trifiro', Antonio, Trimarchi, Marina, Verde, G., and Vigilante, M.

Published
2016

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

Author

E. V. Pagano, L. Acosta, Auditore, Lucrezia, Baran, V., Cap, T., Cardella, G., Colonna, M., DE LUCA, Saverio, De Filippo, E., Dell’Aquila, D., Francalanza, L., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C., Martorana, N. S., Norella, Sebastianella, Pagano, A., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F., Quattrocchi, Lucia, Rizzo, F., Rosato, E., Russotto, P., Siwek Wilczynska, K., Trifiro', Antonio, Trimarchi, Marina, Verde, G., and Vigilante, M.

Published
2016

45. Dalla frammentazione del neck alla fissione dinamica: gli esperimenti TimeScale e InKiIsSy al LNS

Author

Acosta, L., Amorini, F., Auditore, Lucrezia, Baran, V., Berceanu, I., Cap, T., Cardella, G., Colonna, M., De Filippo, E. ., Francalanza, L., Geraci, E., Gianì, R., Gnoffo, B. Grassi L., Grzeszczuk, A., Guazzoni, P., Han, J., La Guidara, E., Lanzalone, G., Lombardo, I., Majolino, C., Minniti, Triestino, Pagano, A., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Pop, A., Porto, F., Quattrocchi, Lucia, Rizzo, F., Rosato, E., Russotto, P., Santoro, Simone, Trifiro', Antonio, Trimarchi, Marina, Verde, G., Vigilante, M., Wilczynski, J., per la collaborazione EXOCHIM, Zetta L., Acosta L., Amorini F., Auditore L., Baran V., Berceanu I., Cap T., Cardella G., Colonna M., De Filippo E., Francalanza L., Geraci E., Gianì R., Gnoffo B. Grassi L., Grzeszczuk A., Guazzoni P., Han J., La Guidara E., Lanzalone G., Lombardo I., Majolino C., Minniti T., Pagano A., Pagano E.V., Papa M., Piasecki E., Pirrone S., Politi G., Pop A., Porto F., Quattrocchi L., Rizzo F., Rosato E., Russotto P., Santoro S., Trifirò A., Trimarchi M., Verde G., Vigilante M., Wilczynski J., and Zetta L. per la collaborazione EXOCHIM

Published
2013

46. L’esperimento InKiIsSy: effetti di Isospin e di size nella produzione dei frammenti di massa intermedia

Author

Norella, S, Acosta, L, Auditore, Lucrezia, Bran, V, Cap, T, Cardella, G, Colonna, M, De Filippo, E, Francalanza, L, Gnoffo, B, Lanzalone, G, Lombardo, I, Maiolino, C, Marquinez Duran, G, Minniti, Triestino, Pagano, A, Pagano, Ev, Papa, M, Piasecki, E, Pirrone, S, Politi, Giuseppe, Porto, F, Quattrocchi, Lucia, Rizzo, Francesca, Rosato, E, Russotto, P, Siwek Wilczynska, K, Trifirò, A, Trimarchi, M, Verde, G, Vigilante, M, and Wilczynski, J.

Published
2015

47. Production cross sections for intermediate mass fragments from dynamical and statistical decay ofprojectile-like fragments in $^{124}$Sn + $^{64}$Ni and $^{112}$Sn + $^{58}$Ni collisions at 35 A MeV

Author

Russotto, P., Filippo, E. De, Pagano, A., Acosta, L., Auditore, L., 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., Toro, M. Di, Francalanza, L., Frankland, J.D., Galichet, E., Gawlikowicz, W., Geraci, E., Gnoffo, B., Grzeszczuk, A., Guazzoni, P., Kowalski, S., Lanzalone, G., Lanzano, G., Le Neindre, N., Lombardo, I., Maiolino, C., Minniti, T., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Płaneta, R., Politi, G., Porto, F., Quattrocchi, L., Rivet, M. F., Rosato, E., Rizzo, F., Schmidt, K., Siwek-Wilczynska, K., Skwira-Chalot, I., Trifiro, A., Trimarchi, M., Verde, G., Vigilante, M., Wieleczko, J.P., Wilczynski, J., Zetta, L., Zipper, W., Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania = University of Catania (Unict), Laboratori Nazionali del Sud (LNS), Istituto Nazionale di Fisica Nucleare (INFN), 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), 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)-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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Chimera, Università degli studi di Catania [Catania], 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), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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.Mn, 25.70.Pq, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

International audience; Background: In heavy-ion collisions at intermediate energies the production of light charged particles andintermediate mass fragments (IMFs) is due to different reaction mechanisms and different time scales, rangingfrom 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 previousworks. In this paper, the analysis is expanded for the same set of data and production cross sections have beenevaluated 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 emissionmechanisms. Probability of the dynamical emission of IMFs is strongly influenced by the (N/Z) ratio of thecolliding system.Conclusions: It is demonstrated that the statistical emission is equally probable for the two systems, whilethe dynamical emission is enhanced for the neutron-rich system, especially for heavy fragments (Z>6). Theobserved effect points at a high sensitivity of the prompt-dynamical emission to the (N/Z) ratio of a givensystem.

Published
2015

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

Author

Russotto, P., De Filippo, E., Pagano, A., 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, E., Gnoffo, B., Grzeszczuk, A., Guazzoni, P., Kuwalski, S., Lanzalone, G., Lanzanò, G., Le Neindre, N., Lombardo, I., Maiolino, C., Minniti, Triestino, Pagano, Ev, Papa, M., Piasecki, E., Pirrone, S., Planeta, R., Politi, G., Porto, F., Quattrocchi, Lucia, Rivet, M. F., Rosato, E., Rizzo, F., Schmidt, K., Siwek Wilczynska, K., Skwira Chalot, I., Trifiro', Antonio, Trimarchi, Marina, Verde, G., Vigilante, M., Wieleczko, Jp, Wilczynski, J., Zetta, L., and Zipper, W.

Subjects
heavy ion collisions
Published
2015

49. 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

Author

Russotto, P., De Filippo, E., Pagano, A., Acosta, L., Auditore, L., 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, E., Gnoffo, B., Grzeszczuk, A., Guazzoni, P., Kowalski, S., Lanzalone, G., Lanzanò, G., Le Neindre, N., Lombardo, I., Maiolino, C., Minniti, T., Pagano, E. V., Papa, M., Piasecki, E., Pirrone, S., Płaneta, Roman, Politi, G., Porto, F., Quattrocchi, L., Rivet, M. F., Rosato, E., Rizzo, F., Schmidt, K., Siwek-Wilczyńska, K., Skwira-Chalot, I., Trifirò, A., Trimarchi, M., Verde, G., Vigilante, M., Wieleczko, J. P., Wilczyński, J., Zetta, L., and Zipper, W.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
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 ^{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.

Published
2015

50. The InKiIsSY experiment at LNS: a study of the size vs. isospin effects with Xe-124+Zn-64 and Sn-124,Sn-112*Ni-64,Ni-58 reactions

Author

Quattrocchi, Lucia, Acosta, L., Auditore, Lucrezia, Baran, V., Cap, T, Cardella, G, Colonna, M., De Filippo, E., Francalanza, L, Geraci, E., Gnoffo, B., Lanzalone, G., Lombardo, I., Maiolino, C, Marquinez – Duran, G, Morgana, Emanuele, Minniti, Triestino, Norella, Sebastianella, Pagano, A., P. a. g. a. n. o., . E. V., Papa, M., Piasecki, E., Pirrone, S., Politi, G., Porto, F, Rizzo, F, Rosato, E., Russotto, P, Trifiro', Antonio, Trimarchi, Marina, Verde, G, Vigilante, M., and Wilczynski, J.

Published
2015

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