Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where G. Ranucci is active.

Publication


Featured researches published by G. Ranucci.


Physical Review Letters | 2012

First evidence of pep solar neutrinos by direct detection in Borexino.

G. Bellini; J. Benziger; D. Bick; S. Bonetti; G. Bonfini; D. Bravo; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; C. Carraro; P. Cavalcante; A. Chavarria; A. Chepurnov; D. D’Angelo; S. Davini; A. Derbin; A. Etenko; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger-Neff; A. Goretti; L. Grandi; E. Guardincerri; S. Hardy; Aldo Ianni

G. Bellini, J. Benziger, D. Bick, S. Bonetti, G. Bonfini, D. Bravo, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, F. Calaprice, C. Carraro, P. Cavalcante, A. Chavarria, D. D’Angelo, S. Davini, A. Derbin, A. Etenko, K. Fomenko, 4 D. Franco, C. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Goeger-Neff, A. Goretti, L. Grandi, E. Guardincerri, S. Hardy, Aldo Ianni, Andrea Ianni, D. Korablev, G. Korga, Y. Koshio, D. Kryn, M. Laubenstein, T. Lewke, E. Litvinovich, B. Loer, F. Lombardi, P. Lombardi, L. Ludhova, I. Machulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, 4 D. Montanari, 7 P. Mosteiro, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, K. Otis, M. Pallavicini, L. Papp, L. Perasso, S. Perasso, A. Pocar, J. Quirk, R.S. Raghavan, G. Ranucci, A. Razeto, A. Re, A. Romani, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schönert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, D. Vignaud, R.B. Vogelaar, F. von Feilitzsch, J. Winter, M. Wojcik, A. Wright, M. Wurm, J. Xu, O. Zaimidoroga, S. Zavatarelli, and G. Zuzel


Astroparticle Physics | 2002

Science and technology of Borexino: a real-time detector for low energy solar neutrinos

G. Alimonti; C. Arpesella; H. O. Back; M. Balata; T. Beau; G. Bellini; J. Benziger; S. Bonetti; A. Brigatti; B. Caccianiga; L. Cadonati; F. Calaprice; G. Cecchet; M. Chen; A. de Bari; E. de Haas; H. de Kerret; O. Donghi; M. Deutsch; F. Elisei; A. Etenko; F. von Feilitzsch; R. Fernholz; R. Ford; B. Freudiger; A. Garagiola; C. Galbiati; F. Gatti; S. Gazzana; M. Giammarchi

Abstract Borexino, a real-time device for low energy neutrino spectroscopy is nearing completion of construction in the underground laboratories at Gran Sasso, Italy (LNGS). The experiments goal is the direct measurement of the flux of 7 Be solar neutrinos of all flavors via neutrino–electron scattering in an ultra-pure scintillation liquid. Seeded by a series of innovations which were brought to fruition by large-scale operation of a 4-ton test detector at LNGS, a new technology has been developed for Borexino. It enables sub-MeV solar neutrino spectroscopy for the first time. This paper describes the design of Borexino, the various facilities essential to its operation, its spectroscopic and background suppression capabilities and a prognosis of the impact of its results towards resolving the solar neutrino problem. Borexino will also address several other frontier questions in particle physics, astrophysics and geophysics.


Physical Review D | 2010

Measurement of the solar 8B neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector

G. Bellini; J. Benziger; S. Bonetti; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; C. Carraro; A. Chavarria; F. Dalnoki-Veress; D. D'Angelo; S. Davini; H. de Kerret; A. Derbin; A. Etenko; A. Chepurnov; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger-Neff; A. Goretti; E. Gurdincerri; S. Hardy; Aldo Ianni; Andrea Ianni; M. Joyce; Y. Koshio

G. Bellini, J. Benziger, S. Bonetti, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, F. Calaprice, C. Carraro, A. Chavarria, A. Chepurnov, F. Dalnoki-Veress, D. D’Angelo, S. Davini, H. de Kerret, A. Derbin, A. Etenko, K. Fomenko, D. Franco, C. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Goeger-Neff, A. Goretti, E. Guardincerri, S. Hardy, Aldo Ianni, Andrea Ianni, M. Joyce, G. Korga, D. Kryn, M. Laubenstein, M. Leung, T. Lewke, E. Litvinovich, B. Loer, P. Lombardi, L. Ludhova, I. Machulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, 11 D. Montanari, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, S. Perasso, A. Pocar, R.S. Raghavan, G. Ranucci, A. Razeto, A. Re, P. Risso, A. Romani, D. Rountree, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schönert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, 9 R. Tartaglia, G. Testera, D. Vignaud, R.B. Vogelaar, F. von Feilitzsch, J. Winter, M. Wojcik, A. Wright, M. Wurm, J. Xu, O. Zaimidoroga, S. Zavatarelli, and G. Zuzel


Physics Letters B | 2010

Observation of Geo{Neutrinos

G. Bellini; J. Benziger; S. Bonetti; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; C. Carraro; A. Chavarria; F. Dalnoki-Veress; D. D'Angelo; S. Davini; H. de Kerret; A. Derbin; A. Etenko; Gianni Fiorentini; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger-Neff; A. Goretti; E. Guardincerri; S. Hardy; Aldo Ianni; Andrea Ianni; M. Joyce; V. Kobychev

Geo–neutrinos, electron anti–neutrinos produced in β decays of naturally occurring radioactive isotopes in the Earth, are a unique direct probe of our planet’s interior. We report the first observation at more than 3σ C.L. of geo–neutrinos, performed with the Borexino detector at Laboratori Nazionali del Gran Sasso. Anti–neutrinos are detected through the neutron inverse β decay reaction. With a 252.6 ton·yr fiducial exposure after all selection cuts, we detected 9.9 −3.4( +14.6 −8.2 ) geo–neutrino events, with errors corresponding to a 68.3% (99.73%) C.L. From the lnL profile, the statistical significance of the Borexino geo-neutrino observation corresponds to a 99.997% C.L. Our measurement of the geo–neutrinos rate is 3.9 −1.3( +5.8 −3.2) events/(100 ton·yr). The observed prompt positron spectrum above 2.6 MeV is compatible with that expected from european nuclear reactors (mean base line of approximately 1000 km). Our measurement of reactor anti–neutrinos excludes the non-oscillation hypothesis at 99.60% C.L. This measurement rejects the hypothesis of an active geo-reactor in the Earth’s core with a power above 3 TW at 95% C.L.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1998

A large-scale low-background liquid scintillation detector: the counting test facility at Gran Sasso

G. Alimonti; C. Arpesella; G Bacchiocchi; M. Balata; G. Bellini; J. Benziger; S. Bonetti; A. Brigatti; L. Cadonati; Frank Calaprice; R Cavaletti; G. Cecchet; M. Chen; Nicholas C. Darnton; A deBari; M. Deutsch; F. Elisei; F. von Feilitzsch; C. Galbiati; A. Garagiola; F. Gatti; M. Giammarchi; D. Giugni; T. Goldbrunner; A. Golubchikov; A. Goretti; S Grabar; T. Hagner; F. X. Hartmann; R. von Hentig

A 4.8 m3 unsegmented liquid scintillation detector at the underground Laboratori Nazionali del Gran Sasso has shown the feasibility of multi-ton low-background detectors operating to energies as low as 250 keV. Detector construction and the handling of large volumes of liquid scintillator to minimize the background are described. The scintillator, 1.5 g PPO/L-pseudocumene, is held in a flexible nylon vessel shielded by 1000 t of purified water. The active detector volume is viewed by 100 photomultipliers, which measure time and charge for each event, from which energy, position and pulse shape are deduced. On-line purification of the scintillator by water extraction, vacuum distillation and nitrogen stripping removed radioactive impurities. Upper limits were established of < 10−7 Bq/kg-scintillator for events with energies 250 keV < E < 800 keV, and < 10−9 Bq/kg-scintillator due to the decay products of uranium and thorium. The isotopic abundance of 14C12C in the scintillator was shown to be approximately 10−18 by extending the energy window of the detector to 25–250 keV. The 14C abundance and uranium and thorium levels in the CTF are compatible with the Borexino Solar Neutrino Experiment.


Astroparticle Physics | 1998

Ultra-low background measurements in a large volume underground detector

G. Alimonti; O Zaimidoroga; S. Magni; C. Galbiati; T. Goldbrunner; F. Masetti; T. Hagner; G. Cecchet; S. Vitale; S. Bonetti; G. Manuzio; R.B. Vogelaar; S. Malvezzi; M. Neff; M. Deutsch; F. Gatti; G. Testera; I. Manno; M. Johnson; G. Anghloher; R. S. Raghavan; P. Ullucci; G. Heusser; A. Golubchikov; P. Lombardi; F. Elisei; R. Tartaglia; A. Nostro; A. Perotti; G. Ranucci

A large volume (4.8 m3) liquid scintillator detector has been running in Hall C of the Gran Sasso Underground Laboratory since February 1995. This detector is called the “Counting Test Facility” (CTF). The main goal of the detector facility is the measurement of ultralow background levels in scintillators and the development of processes able to purify them at this level. The detector has been designed to have exceptional sensitivity using a variety of methods to identify backgrounds. With the CTF, records were achieved in the domain of low background large volume detectors. Limits of 3.5 ± 1.3 × 10−16 g/g and 4.4−1.2+1.5 × 10−16 g/g for the 238U and 232Th daughters, respectively, and 1.85 ± 0.13 ± 0.01 × 10−18 for the isotopic abundance of 14C relative to 12C were obtained. These results are very encouraging and point towards the feasibility of low energy, real time scintillation detectors for solar neutrinos, such as Borexino.


Physics Letters B | 1998

Measurement of the 14C abundance in a low-background liquid scintillator

G. Alimonti; G. Angloher; C. Arpesella; M. Balata; G. Bellini; J. Benziger; S. Bonetti; L. Cadonati; F. Calaprice; G. Cecchet; M. Chen; Nicholas C. Darnton; A. de Bari; M. Deutsch; F. Elisei; F. von Feilitzsch; C. Galbiati; F. Gatti; M. Giammarchi; D. Giugni; T. Goldbrunner; A. Golubchikov; A. Goretti; T. Hagner; F. X. Hartmann; R. von Hentig; G. Heusser; Andrea Ianni; J. Jochum; M Johnson

Abstract The 14 C/ 12 C ratio in 4.8 m 3 of high-purity liquid scintillator was measured at (1.94±0.09)×10 −18 , the lowest 14 C abundance ever measured. At this level the spectroscopy of low-energy solar neutrinos, in particular a measurement of the 7 Be neutrino flux, will not be obstructed by the 14 C β decay intrinsic to a liquid scintillator detector. A comprehensive study of the deviation of the shape of the 14 C β spectrum from the allowed statistical shape reveals consistent results with recent observations and calculations. Possible origins of the 14 C in the liquid scintillator are discussed.


Physics Letters B | 2013

Measurement of geo-neutrinos from 1353 days of Borexino

G. Bellini; J. Benziger; D. Bick; G. Bonfini; D. Bravo; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; F. Calaprice; P. Cavalcante; A. Chavarria; A. Chepurnov; D. D'Angelo; S. Davini; A. Derbin; A. Empl; A. Etenko; G. Fiorentini; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger-Neff; A. Goretti; L. Grandi; C. Hagner; E. Hungerford; Aldo Ianni

Abstract We present a measurement of the geo-neutrino signal obtained from 1353 days of data with the Borexino detector at Laboratori Nazionali del Gran Sasso in Italy. With a fiducial exposure of ( 3.69 ± 0.16 ) × 10 31 proton × year after all selection cuts and background subtraction, we detected ( 14.3 ± 4.4 ) geo-neutrino events assuming a fixed chondritic mass Th/U ratio of 3.9. This corresponds to a geo-neutrino signal S geo = ( 38.8 ± 12.0 ) TNU with just a 6 × 10 − 6 probability for a null geo-neutrino measurement. With U and Th left as free parameters in the fit, the relative signals are S Th = ( 10.6 ± 12.7 ) TNU and S U = ( 26.5 ± 19.5 ) TNU . Borexino data alone are compatible with a mantle geo-neutrino signal of ( 15.4 ± 12.3 ) TNU , while a combined analysis with the KamLAND data allows to extract a mantle signal of ( 14.1 ± 8.1 ) TNU . Our measurement of 31.2 − 6.1 + 7.0 reactor anti-neutrino events is in agreement with expectations in the presence of neutrino oscillations.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1995

An analytical approach to the evaluation of the pulse shape discrimination properties of scintillators

G. Ranucci

Abstract In this paper a general methodology to compute the performances of different pulse shape discrimination techniques, applied to exploit the intrinsic PSD features of organic and of some inorganic scintillators, is presented. The most popular methods, i.e. the rise time technique and the charge integration approach, are evaluated and compared. As a specific example, detailed calculations are carried out for a binary organic liquid scintillator under consideration for the low energy solar neutrino experiment Borexino. It is demonstrated, in particular, that the charge integration method offers superior performances, the difference being remarkable for pulses comprising a low number of photoelectrons.


Journal of High Energy Physics | 2013

SOX: Short distance neutrino Oscillations with BoreXino

G. Bellini; D. Bick; G. Bonfini; D. Bravo; B. Caccianiga; F. Calaprice; A. Caminata; P. Cavalcante; A. Chavarria; A. Chepurnov; D. D’Angelo; S. Davini; A. Derbin; A. Etenko; G. Fernandes; K. Fomenko; D. Franco; C. Galbiati; C. Ghiano; M. Göger-Neff; A. Goretti; C. Hagner; E. Hungerford; Aldo Ianni; Andrea Ianni; V. Kobychev; D. Korablev; G. Korga; D. Krasnicky; D. Kryn

A bstractThe very low radioactive background of the Borexino detector, its large size, and the well proved capability to detect both low energy electron neutrinos and antineutrinos make an ideal case for the study of short distance neutrino oscillations with artificial sources at Gran Sasso.This paper describes the possible layouts of 51Cr (νe) and 144Ce-144Pr

Collaboration


Dive into the G. Ranucci's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

M. Giammarchi

Istituto Nazionale di Fisica Nucleare

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

K. Fomenko

Joint Institute for Nuclear Research

View shared research outputs
Top Co-Authors

Avatar

A. Derbin

Petersburg Nuclear Physics Institute

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

S. Davini

University of Houston

View shared research outputs
Researchain Logo
Decentralizing Knowledge