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Search Results: 1 - 10 of 461831 matches for " A. Pullia "
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A new technique for direct investigation of dark matter
R. Bertoni,F. Chignoli,D. Chiesa,D. Chiesa,M. Clemenza,G. Lucchini,R. Mazza,P. Negri,A. Pullia,N. Redaelli,L. Zanotti,D. Cundy
Physics , 2013, DOI: 10.1016/j.nima.2014.01.026
Abstract: The MOSCAB experiment (Materia OSCura A Bolle) uses a new technique for Dark Matter search. The Geyser technique is applied to the construction of a prototype detector with a mass of 0.5 kg and the encouraging results are reported here; an accent is placed on a big detector of 40 kg in construction at the Milano-Bicocca University and INFN.
Weak neutral currents discovery: a giant step for particle physics
Pullia Antonino,Vialle Jean-Pierre
Europhysics News , 2010, DOI: 10.1051/epn/2010103
Abstract:
First tests for an online treatment monitoring system with in-beam PET for proton therapy
Aafke C. Kraan,G. Battistoni,N. Belcari,N. Camarlinghi,F. Cappucci,M. Ciocca,A. Ferrari,S. Ferretti,A. Mairani,S. Molinelli,M. Pullia,A. Retico,P. Sala,G. Sportelli,A. Del Guerra,V. Rosso
Physics , 2014, DOI: 10.1088/1748-0221/10/01/C01010
Abstract: PET imaging is a non-invasive technique for particle range verification in proton therapy. It is based on measuring the beta+ annihilations caused by nuclear interactions of the protons in the patient. In this work we present measurements for proton range verification in phantoms, performed at the CNAO particle therapy treatment center in Pavia, Italy, with our 10 x 10 cm^2 planar PET prototype DoPET. PMMA phantoms were irradiated with mono-energetic proton beams and clinical treatment plans, and PET data were acquired during and shortly after proton irradiation. We created 1-D profiles of the beta+ activity along the proton beam-axis, and evaluated the difference between the proximal rise and the distal fall-off position of the activity distribution. A good agreement with FLUKA Monte Carlo predictions was obtained. We also assessed the system response when the PMMA phantom contained an air cavity. The system was able to detect these cavities quickly after irradiation.
Performance of the Fully Digital FPGA-based Front-End Electronics for the GALILEO Array
D. Barrientos,M. Bellato,D. Bazzacco,D. Bortolato,P. Cocconi,A. Gadea,V. González,M. Gulmini,R. Isocrate,D. Mengoni,A. Pullia,F. Recchia,D. Rosso,E. Sanchis,N. Toniolo,C. A. Ur,J. J. Valiente-Dobón
Physics , 2014,
Abstract: In this work we present the architecture and results of a fully digital Front End Electronics (FEE) read out system developed for the GALILEO array. The FEE system, developed in collaboration with the Advanced Gamma Tracking Array (AGATA) collaboration, is composed of three main blocks: preamplifiers, digitizers and preprocessing electronics. The slow control system contains a custom Linux driver, a dynamic library and a server implementing network services. The digital processing of the data from the GALILEO germanium detectors has demonstrated the capability to achieve an energy resolution of 1.53 per mil at an energy of 1.33 MeV.
Gamma-ray tracking with segmented HPGe detectors
Wieland, O.;Kr?ll, Th.;Bazzacco, D.;Venturelli, R.;Camera, F.;Million, B.;Musso, E.;Quintana, B.;Ur, C. A.;Bellato, M.;Isocrate, R.;Manea, Ch.;Menegazzo, R.;Pavan, P.;Rossi Alvarez, C.;Farnea, E.;Gadea, A.;Rosso, D.;Spolaore, P.;Pullia, A.;Casati, G.;Geraci, A.;Ripamonti, G.;Descovich, M.;
Brazilian Journal of Physics , 2003, DOI: 10.1590/S0103-97332003000200007
Abstract: this paper gives a brief overview of the technical progress that can be achieved with the newly available segmented hpge detectors. gamma-ray tracking detectors are a new generation of hpge detectors which are currently being developed to improve significantly the efficiency and resolving power of the 4p germanium detectors arrays for high-precision g-ray spectroscopy. they consist of highly segmented hpge detectors associated with fast digital front-end electronics. through the pulse-shape analysis of the signals it is possible to extract the energy, timing and spatial information on the few interactions a g-ray undergoes in the hpge detector. the tracks of the g-rays in the hpge detector can then be reconstructed in three dimensions based on the compton scattering formula. such a detector has been used for the first time during an in-beam experiment. the g-decay of the coulomb excitation of a 56fe nucleus was measured with the highly segmented mars prototype positioned at 135 degree. the energy resolution has been improved by a factor of 3 as compared to standard hpge detectors due to very precise doppler correction based on knowledge of the g-ray track.
Measurement of neutrino oscillations by means of a high density detector on the atmospheric neutrino beam
M. Aglietta,M. Ambrosio,E. Aprile,G. Bologna,M. Bonesini,G. Bencivenni,M. Calvi,A. Castellina,A. Curioni,W. Fulgione,P. L. Ghia,C. Gustavino,R. P. Kokoulin,G. Mannocchi,F. Murtas,G. P. Murtas,P. Negri,M. Paganoni,L. Periale,A. A. Petrukhin,P. Picchi,A. Pullia,S. Ragazzi,N. Redaelli,L. Satta,T. Tabarelli de Fatis,F. Terranova,A. Tonazzo,G. Trinchero,P. Vallania,B. Villone
Physics , 1999,
Abstract: A high-density calorimeter, consisting of magnetized iron planes interleaved by RPCs, as tracking and timing devices, is a good candidate for a next generation experiment on atmospheric neutrinos. With 34 kt of mass and in four years of data taking, this experiment will be sensitive to $\nu_\mu \to \nu_x$ oscillation with $\Delta m^2 > 6 \times 10^{-5}$ and mixing near to maximal and fully cover the region of oscillation parameters suggested by Super-Kamiokande results. Moreover, the experimental method will enable to measure the oscillation parameters from the modulation of the L/E spectrum ($\nu_\mu$ disappearance). For $\Delta m^2 > 3 \times 10^{-3}$ eV$^2$, this experiment can also establish whether the oscillation occurs into a tau or a sterile neutrino, by looking for an excess of muon-less events at high energies produced by upward-going tau neutrinos ($\nu_\tau$ appearance).
Isotopic Dependence of the Caloric Curve
The ALADIN2000 Collaboration,W. Trautmann,P. Adrich,T. Aumann,C. O. Bacri,T. Barczyk,R. Bassini,S. Bianchin,C. Boiano,A. S. Botvina,A. Boudard,J. Brzychczyk,A. Chbihi,J. Cibor,B. Czech,M. De Napoli,J. -E. Ducret,H. Emling,J. D. Frankland,M. Hellstroem,D. Henzlova,G. Imme,I. Iori,H. Johansson,K. Kezzar,A. Lafriakh,A. Le Fevre,E. Le Gentil,Y. Leifels,J. Luehning,J. Lukasik,W. G. Lynch,U. Lynen,Z. Majka,M. Mocko,W. F. J. Mueller,A. Mykulyak,H. Orth,A. N. Otte,R. Palit,P. Pawlowski,A. Pullia,G. Raciti,E. Rapisarda,H. Sann,C. Schwarz,C. Sfienti,H. Simon,K. Suemmerer,M. B. Tsang,G. Verde,C. Volant,M. Wallace,H. Weick,J. Wiechula,A. Wieloch,B. Zwieglinski
Physics , 2009, DOI: 10.1016/j.ppnp.2008.12.006
Abstract: Isotopic effects in projectile fragmentation at relativistic energies have been studied with the ALADIN forward spectrometer at SIS. Stable and radioactive Sn and La beams with an incident energy of 600 MeV per nucleon have been used in order to explore a wide range of isotopic compositions. Chemical freeze-out temperatures are found to be nearly invariant with respect to the A/Z ratio of the produced spectator sources, consistent with predictions for expanded systems. Consequences for the proposed interpretation of chemical breakup temperatures as representing the limiting temperatures predicted by microscopic models are discussed.
Discriminant Analysis and Secondary-Beam Charge Recognition
J. Lukasik,P. Adrich,T. Aumann,C. O. Bacri,T. Barczyk,R. Bassini,S. Bianchin,C. Boiano,A. S. Botvina,A. Boudard,J. Brzychczyk,A. Chbihi,J. Cibor,B. Czech,J. -E. Ducret,H. Emling,J. Frankland,M. Hellstroem,D. Henzlova,G. Imme,I. Iori,H. Johansson,K. Kezzar,A. Lafriakh,A. Le Fevre,E. Le Gentil,Y. Leifels,J. Luehning,W. G. Lynch,U. Lynen,Z. Majka,M. Mocko,W. F. J. Mueller,A. Mykulyak,M. De Napoli,H. Orth,A. N. Otte,R. Palit,P. Pawlowski,A. Pullia,G. Raciti,E. Rapisarda,H. Sann,C. Schwarz,C. Sfienti,H. Simon,K. Summerer,W. Trautmann,M. B. Tsang,G. Verde,C. Volant,M. Wallace,H. Weick,J. Wiechula,A. Wieloch,B. Zwieglinski
Physics , 2007, DOI: 10.1016/j.nima.2008.01.071
Abstract: The discriminant-analysis method has been applied to optimize the exotic-beam charge recognition in a projectile fragmentation experiment. The experiment was carried out at the GSI using the fragment separator (FRS) to produce and select the relativistic secondary beams, and the ALADIN setup to measure their fragmentation products following collisions with Sn target nuclei. The beams of neutron poor isotopes around 124La and 107Sn were selected to study the isospin dependence of the limiting temperature of heavy nuclei by comparing with results for stable 124Sn projectiles. A dedicated detector to measure the projectile charge upstream of the reaction target was not used, and alternative methods had to be developed. The presented method, based on the multivariate discriminant analysis, allowed to increase the efficacy of charge recognition up to about 90%, which was about 20% more than achieved with the simple scalar methods.
N/Z Dependence of Projectile Fragmentation
W. Trautmann,P. Adrich,T. Aumann,C. O. Bacri,T. Barczyk,R. Bassini,S. Bianchin,C. Boiano,A. S. Botvina,A. Boudard,J. Brzychczyk,A. Chbihi,J. Cibor,B. Czech,M. De Napoli,J. -E. Ducret,H. Emling,J. D. Frankland,M. Hellstroem,D. Henzlova,G. Imme,I. Iori,H. Johansson,K. Kezzar,A. Lafriakh,A. Le Fevre,E. Le Gentil,Y. Leifels,J. Luehning,J. Lukasik,W. G. Lynch,U. Lynen,Z. Majka,M. Mocko,W. F. J. Mueller,A. Mykulyak,H. Orth,A. N. Otte,R. Palit,P. Pawlowski,A. Pullia,G. Raciti,E. Rapisarda,H. Sann,C. Schwarz,C. Sfienti,H. Simon,K. Suemmerer,M. B. Tsang,G. Verde,C. Volant,M. Wallace,H. Weick,J. Wiechula,A. Wieloch,B. Zwieglinski
Physics , 2007, DOI: 10.1142/S0218301308010829
Abstract: The N/Z dependence of projectile fragmentation at relativistic energies has been studied in a recent experiment at the GSI laboratory with the ALADiN forward spectrometer coupled to the LAND neutron detector. Besides a primary beam of 124Sn, also secondary beams of 124La and 107Sn delivered by the FRS fragment separator have been used in order to extend the range of isotopic compositions of the produced spectator sources. With the achieved mass resolution of \Delta A/A \approx 1.5%, lighter isotopes with atomic numbers Z \le 10 are individually resolved. The presently ongoing analyses of the measured isotope yields focus on isoscaling and its relation to the properties of hot fragments at freeze-out and on the derivation of chemical freeze-out temperatures which are found to be independent of the isotopic composition of the studied systems. The latter result is at variance with the predictions for limiting temperatures as obtained with finite-temperature Hartree-Fock calculations.
Tracing a phase transition with fluctuations of the largest fragment size: Statistical multifragmentation models and the ALADIN S254 data
T. Pietrzak,P. Adrich,T. Aumann,C. O. Bacri,T. Barczyk,R. Bassini,S. Bianchin,C. Boiano,A. S. Botvina,A. Boudard,J. Brzychczyk,A. Chbihi,J. Cibor,B. Czech,M. De Napoli,J. -E. Ducret,H. Emling,J. D. Frankland,M. Hellstrom,D. Henzlova,G. Imme,I. Iori,H. Johansson,K. Kezzar,A. Lafriakh,A. Le Fevre,E. Le Gentil,Y. Leifels,J. Luhning,J. Lukasik,W. G. Lynch,U. Lynen,Z. Majka,M. Mocko,W. F. J. Muller,A. Mykulyak,H. Orth,A. N. Otte,R. Palit,P. Pawlowski,A. Pullia,G. Raciti,E. Rapisarda,H. Sann,C. Schwarz,C. Sfienti,H. Simon,K. Summerer,W. Trautmann,M. B. Tsang,G. Verde,C. Volant,M. Wallace,H. Weick,J. Wiechula,A. Wieloch,B. Zwieglinski
Physics , 2010,
Abstract: A phase transition signature associated with cumulants of the largest fragment size distribution has been identified in statistical multifragmentation models and examined in analysis of the ALADIN S254 data on fragmentation of neutron-poor and neutron-rich projectiles. Characteristics of the transition point indicated by this signature are weakly dependent on the A/Z ratio of the fragmenting spectator source. In particular, chemical freeze-out temperatures are estimated within the range 5.9 to 6.5 MeV. The experimental results are well reproduced by the SMM model.
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