Fragmentation studies with the CHIMERA detector at LNS in Catania: recent progress

Pagano, A.; Alderighi, M.; Amorini, F.; Anzalone, A.; Arena, Luigi; Auditore, L.; Baran, V.; Bartolucci, M.; Berceanu, I.; Blicharska, J.; Brzychczyk, J.; Bonasera, A.; Borderie, B.; Bougault, R.; Bruno, M.; Cardella, G.; Cavallaro, S.; Chatterjee, M. B.; Chbihi, A.; Cibor, J.; Colonna, M.; D’Agostino, M.; Dayras, R.; Filippo, E. De; Toro, M. Di; Gawlikowicz, W.; Geraci, E.; Giustolisi, F.; Grzeszczuk, A.; Guazzoni, P.; Guinet, D.; Iacono-Manno, M.; Kowalski, S.; Guidara, E. La; Lanzanó, G.; Lanzalone, G.; Neindre, N. Le; Li, S.; Nigro, S. Ló; Maiolino, C.; Majka, Z.; Manfredi, G.; Paduszyński, T.; Papa, M.; Petrovici, M.; Piasecki, E.; Pirrone, S.; Płaneta, R.; Politi, G.; Pop, A.; Porto, F.; Rivet, M. F.; Rosato, E.; Rizzo, F.; Russo, Simone; Russotto, P.; Sassi, M.; Sechi, G.R.; Simion, V.; Siwek‐Wilczyńska, K.; Skwira, I.; Sperduto, M. L.; Steckmeyer, J.C.; Świderski, Ł.; Trifiró, A.; Trimarchi, M.; Vannini, G.; Vigilante, M.; Wieleczko, J. P.; Wilczyńskí, J.; Wu, Huiqin; Zhang, Xiao; Zetta, L.; Zipper, W.

doi:10.1016/j.nuclphysa.2004.01.093

Cited by 159 publications

(55 citation statements)

References 22 publications

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“…A selfsupporting 58 Ni target (200 μg/cm 2 thick) was bombarded by a pulsed 112 Sn beam (of ≈1 ns time resolution), delivered by the Superconducting Cyclotron of the Laboratori Nazionali del Sud of INFN in Catania. Reaction products were detected with the CHIMERA multidetector [12,13] in the complete configuration consisting of 1192 telescopes. They are mounted at polar angles from 1 • to 176 • , in an axially symmetric configuration around the beam axis with a nominal geometric coverage of ≈94% of 4π .…”

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confidence: 99%

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Casini¹,

Piantelli²,

Maurenzig³

et al. 2012

Phys. Rev. C

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Odd-even staggering effects on charge distributions are investigated for fragments produced in semiperipheral and central collisions of 112 Sn + 58 Ni at 35 MeV/nucleon. For fragments with Z 16 one observes a clear overproduction of even charges, which decreases for heavier fragments. Staggering persists up to Z ∼ 30. The staggering appears to be substantially independent of the centrality of the collisions, suggesting that it is mainly related to the last few steps in the decay of hot nuclei.

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confidence: 99%

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Casini¹,

Piantelli²,

Maurenzig³

et al. 2012

Phys. Rev. C

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“…Each detector unit consists of a 300-m-thick silicon detector, while the second one is a thick CsI(Tl) scintillator crystal coupled to a photodiode, whose thickness varies with increasing angle from 12 to 3 cm. A detailed description of the detector structure and performance together with the available identification techniques is presented in [8]. The standard acquisition chain is fully analog.…”

Section: A the Chimera Detectormentioning

confidence: 99%

“…For example, the MUST [5] and MUST2 [6] detection systems and the HiRA [7] detector are based on silicon strip technology and dedicated to the study of reactions in inverse kinematics induced by radioactive beams and to the study of weakly bound or unbound nuclear states with stable and unstable beams. CHIMERA (Charged Heavy Ion Mass and Energy Resolving Array) [8] is one of the largest solid angle coverage (94%) multidetector arrays for charged particles devoted to the study of nuclear reactions at intermediate energies. Reference [9] presents a detailed discussion of the identification of light particles (up to ) obtained with CsI(Tl) scintillators readout by a photodiode in CHIMERA.…”

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confidence: 99%

Investigation of the Dependence of CsI(Tl) Scintillation Time Constants and Intensities on Particle's Energy, Charge and Mass Through Direct Fitting of Digitized Waveforms

Amorini

Boiano

Cardella

et al. 2012

IEEE Trans. Nucl. Sci.

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The dependence of the CsI(Tl) scintillation time constants and intensities on the particle ionization profile is at the basis of the Charge and Mass identification technique for Light Charged Products in Intermediate Energy Nuclear Physics multi-detector arrays. The possibility of storing the digitized waveforms in true beam experiments allows performing further offline analyses and makes available a data set related to the interaction of different particle types in a wide energy range.We propose the direct least-square fitting of the baseline subtracted output waveforms as a method for the determination of the four-vector defining the CsI(Tl) scintillator light output as a function of the particle energy, mass and charge. In the present work we investigate the dependence of the four-vector on the energy deposited in the CsI(Tl) crystal in the range 10 MeV-240 MeV for isotopes with and also for ions with -with no isotopic dependence-through the analysis of the waveform data set . This work was supported by INFN (Istituto Nazionale di Fisica Nucleare) in the framework of the EXOCHIM experiment and partly by the MIUR (Ministero dell'Universita' e della Ricerca Scientifica) program PRIN2009 "Studio e realizzazione del prototipo di un sistema di rivelazione ad alta risoluzione angolare per la misura con alta precisione dell'impulso di particelle leggere e di frammenti, da utilizzare per studi di dinamica e spettroscopia in reazioni nucleari con fasci stabili e radioattivi ad energie basse ed intermedie," protocol 2009RLCYL8.

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“…For example the MUST [1] and MUST2 [2] detection systems and the HiRA [3] detector are based on silicon strip technology and dedicated to the study of reactions induced by radioactive beams on light particles and to the study of weakly bound or unbound nuclear states with stable and unstable beams. CHIMERA [4] is one of the largest solid angle coverage (94%) 41t multidetector arrays for charged particles devoted to the study of nuclear reactions at intermediate energies. All these systems are based on detection cells in a telescope configuration, in which the first layer is a silicon detector featuring different topologies and configurations, while the second detector consists of a thick CsI(Tl) scintillation crystal.…”

Section: Introductionmentioning

confidence: 99%

Determination of CsI(Tl) scintillation time constants and intensities by direct fitting of digitized waveforms in the CHIMERA 4π multidetector

Amorini

Boiano

Cardella

et al. 2011

2011 IEEE Nuclear Science Symposium Conference Record

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The design of modern multi-detector arrays for Intermediate Energy Nuclear Physics experiments has to face the problem of the improvement of the Charge and Mass Identification of Heavy and Light Charged Products. Most of the detector arrays developed for the identification of mass and atomic number of the emitted fragments, use detection units composed by thin silicon detectors and by thick scintillator crystals read-out by photodiodes. The light output of the CsI(TI) crystal can be modeled -at least in a given energy range -with a combination of two exponential functions with different time constants. The possibility of storing the digitized waveforms allows performing further off-line analyses. In the present work we determine -by direct least-square fitting of the base-line subtracted output waveforms -the four-vector defining the light output ('lj, '1;, hI' hs). In this way it is possible to provide an experimental determination of the scintillator parameters for aManuscript received November 10, 2011. This work was supported by INFN -Istituto Nazionale di Fisica Nucleare in the framework of the EXOCHIM experiment and partly by the MIUR (Ministero dell'Universita' e della Ricerca Scientifica) program PRIN2009 "Studio e realizzazione del prototipo di un sistema di rivelazione ad alta risoluzione angolare per la misura con alta precisione dell'impulso di particelle leggere e di frammenti, da utilizzare per studi di dinamica e spettroscopia in reazioni nucleari con fasci stabili e radioattivi ad energie basse ed intermedie ".A. Castoldi, C. Guazzoni and P. Zambon are with wide energy range and for different particle types. The proposed method has been applied to the waveforms acquired with the CHIMERA 41t detector array during runs at the INFN Laboratori Nazionali del Sud Superconducting Cyclotron in Catania, Italy with different beam/target pairs. In this paper we present the results obtained with a 21.5 MeV/u 2°N e beam bombarding a 12 C target.

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Fragmentation studies with the CHIMERA detector at LNS in Catania: recent progress

Cited by 159 publications

References 22 publications

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Investigation of the Dependence of CsI(Tl) Scintillation Time Constants and Intensities on Particle's Energy, Charge and Mass Through Direct Fitting of Digitized Waveforms

Determination of CsI(Tl) scintillation time constants and intensities by direct fitting of digitized waveforms in the CHIMERA 4π multidetector

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Fragmentation studies with the CHIMERA detector at LNS in Catania: recent progress

Cited by 159 publications

References 22 publications

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Investigation of the Dependence of CsI(Tl) Scintillation Time Constants and Intensities on Particle's Energy, Charge and Mass Through Direct Fitting of Digitized Waveforms

Determination of CsI(Tl) scintillation time constants and intensities by direct fitting of digitized waveforms in the CHIMERA 4&#x03C0; multidetector

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Determination of CsI(Tl) scintillation time constants and intensities by direct fitting of digitized waveforms in the CHIMERA 4π multidetector