Ciro Boiano | Istituto Nazionale di Fisica Nucleare (original) (raw)
Papers by Ciro Boiano
Nucleus, 2019
The low-energy light radioactive ion beam in-flight facility EXOTIC and the associated experiment... more The low-energy light radioactive ion beam in-flight facility EXOTIC and the associated experimental set-up,operational at Legnaro National Laboratories of the National Institute of Nuclear Physics (LNL-INFN, Italy) and designed for nuclear physics and nuclear astrophysics experiments, were described. The outline of the experimental program carried out employing the produced radioactive ion beams was presented and the perspectives of the EXOTIC project were discussed.
Abstract—In this work we have measured the performances of a 1”x1 ” sample of a CLYC scintillator... more Abstract—In this work we have measured the performances of a 1”x1 ” sample of a CLYC scintillator (Cs2LiYCl6) with 95 % en-richment of 6Li produced by RMD. Different PMT models, with borosilicate glass window or quartz window have been used. The Pulse line-shape and Pulse shape discrimination for different type of incident radiation (gamma-rays and thermal neutrons) have been investigated. The response to thermal neutrons has been measured using an AmBe source and a digital oscilloscope. A measurement of the internal radiation and the energy resolution for different gamma rays have been additionally performed. Index Terms—Cs2LiYCl6, elpasolites, neutron detectors, gamma-ray detectors, radiation detectors, scintillators, pulse
Journal of Physics: Conference Series, 2015
The study of reactions induced by exotic weakly bound nuclei at energies around the Coulomb barri... more The study of reactions induced by exotic weakly bound nuclei at energies around the Coulomb barrier had attracted a large interest in the last decade, since the features of these nuclei can deeply affect the reaction dynamics. The discrimination between different reaction mechanisms is, in general, a rather difficult task. It can be achieved by using detector arrays covering high solid angle and with high granularity that allow to measure the reaction products and, possibly, coincidences between them, as, for example, recently done for stable weakly bound nuclei [1, 2]. We investigated the collision of the weakly bound nucleus 7 Be on a 58 Ni target at the beam energy of 1.1 times the Coulomb barrier, measuring the elastic scattering angular distribution and the energy and angular distributions of 3 He and 4 He. The 7 Be radioactive ion beam was produced by the facility EXOTIC at INFN-LNL with an energy of 22 MeV and an intensity of ∼3×10 5 pps. Results showed that the 4 He yeld is about 4 times larger than
Journal of Physics: Conference Series, 2015
Esta obra está licenciada sob uma Licença Creative Commons.
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC), 2012
ABSTRACT We present a new highly integrated 16-channels pulse shape amplifier, suitable for proce... more ABSTRACT We present a new highly integrated 16-channels pulse shape amplifier, suitable for processing signals from a variety of radiation detectors: its processing capabilities range from the relatively slow signals of charge sensitive preamplifier, up to the very fast signals typical of scintillation detectors coupled to photo-multiplier tubes (PMT). The amplifier provides the pulse shape analysis using the double constant fraction discriminator technique 131 and for each channel is also present a stretcher circuit and a time to amplitude converter (TAC) section, which allow sequential readout of time and energy parameters.
2006 IEEE Nuclear Science Symposium Conference Record, 2006
ABSTRACT
EPJ Web of Conferences, 2011
The scattering processes of two mirror projectiles, the well bound 17 O (S n = 4.143 MeV) and the... more The scattering processes of two mirror projectiles, the well bound 17 O (S n = 4.143 MeV) and the loosely bound radioactive 17 F (S p = 0.600 MeV), on the proton closed shell target 58 Ni were measured at several energies around the Coulomb barrier. The experimental data were analyzed within the framework of the optical model to extract the reaction cross section and to investigate the role played by direct reaction channels at near-barrier energies. The comparison shows a similar behaviour for the two A = 17 projectiles despite their very different binding energies and suggests a rather small effect of the 17 F breakup channel on the reaction dynamics.
EPJ Web of Conferences, 2014
Elastic scattering has been studied for the collisions induced by 17 O on 58 Ni target at energie... more Elastic scattering has been studied for the collisions induced by 17 O on 58 Ni target at energies around and above the Coulomb barrier. The elastic scattering angular distributions were measured for several energies and were analyzed within the framework of the optical model to obtain total reaction cross sections. The reaction cross-sections of the tightly bound 17 O were compared with those of weakly bound 17 F on the same targets in order to investigate the effects of the low binding energy in the reaction dynamics.
2001 IEEE Nuclear Science Symposium Conference Record (Cat. No.01CH37310)
Two-point charge division is a typical technique for position measurements in linear multi-elemen... more Two-point charge division is a typical technique for position measurements in linear multi-element detectors (microstrip detectors, multi-wire proportional chambers, silicon drift detectors, scintillator arrays coupled to photodetectors). This technique makes use of only two preamplifiers connected at the right and the left ends of the detection array, each of which receives a fraction of the total charge delivered by the
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 2012
The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next g... more The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation γ-ray spectrometer. AGATA is based on the technique of γ-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a γ ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of γ-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer.
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC), 2012
ABSTRACT Pulse pile-up, even at moderate rate of incoming events (20-30 kcps) can significantly d... more ABSTRACT Pulse pile-up, even at moderate rate of incoming events (20-30 kcps) can significantly degrade the performance of Lanthanum bromide (LaBr3) scintillators with respect to their very good energy resolution. A working array of 10 large LaBr3 detectors is available in Milano and we are currently going to improve the existing associated electronics for acquisition and data processing. As a first step, we evaluated the performance and compared advantages and drawbacks of using free running analog to digital converters (ADCs) and subsequent digital signal processing versus the more traditional technique based on analog signal shaping and peak sensing ADCs. The main goal of the optimization process is to preserve the excellent performance of LaBr3 detectors not only in controlled laboratory condition, but also during the experimental campaigns. In this work we analyze, estimate and experimentally measure the effect of pulse pile-up for LaBr3 scintillators with respect to the acquisition and processing electronics (analog or digital), for various counting rate of events. Significant improvements are achieved, both for the analog and digital approach and the associated results are presented.
Physical Review C, 2013
ABSTRACT Fusion cross sections were measured for 8B + 28Si at near-barrier energies by detecting ... more ABSTRACT Fusion cross sections were measured for 8B + 28Si at near-barrier energies by detecting the alpha particles produced in the evaporation process. The results present a small suppression with respect to one-barrier penetration model predictions, which could be attributed to incomplete fusion processes and do not differ appreciably from fusion cross sections obtained with weakly bound but stable projectiles on the same target. Comprehensive comparisons of fusion cross sections at sub- and near-barrier energies with various light weakly bound projectiles support a simple tunneling probability with slight modifications due to coupled-channel effects.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
This article was published in an Elsevier journal. The attached copy is furnished to the author f... more This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and education use, including for instruction at the author's institution, sharing with colleagues and providing to institution administration. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
The design of a preamplifier suited for BGO scintillation detectors is described. The performance... more The design of a preamplifier suited for BGO scintillation detectors is described. The performance of this device and the Compton suppression factors obtained with symmetric and asymmetric BGO-Nal anti-Compton shields are presented.
Journal of Physics: Conference Series, 2011
The reaction dynamics induced by the 17 F Radioactive Ion Beam on the protonshell closed 58 Ni ta... more The reaction dynamics induced by the 17 F Radioactive Ion Beam on the protonshell closed 58 Ni target was studied at two colliding energies slightly above the Coulomb barrier. Charged reaction products were detected at forward angles and the quasi-elastic differential cross section was analyzed within the framework of the optical model in order to extract the reaction cross section and to investigate the relevance of direct reaction channels (inelastic scattering, breakup and transfer) at near-barrier energies. The comparison with the reaction induced by double-magic tightly-bound 16 O projectiles on the same target showed that the 17 F reaction cross section is moderately enhanced at the lower secondary beam energy. Direct reaction channels were also found to be more relevant than for the corresponding 16 O-induced reaction.
IEEE Transactions on Nuclear Science, 2004
We suggest that some key physical parameters of high-purity germanium (HPGe) segmented detectors,... more We suggest that some key physical parameters of high-purity germanium (HPGe) segmented detectors, including segment capacitance and leakage current, can be derived from standard noise measurements. These parameters are relevant when designing and optimizing the front-end electronics.
IEEE Transactions on Nuclear Science, 2001
We present a new discharge mechanism for low-noise fast preamplifiers for γ-ray spectroscopy. Suc... more We present a new discharge mechanism for low-noise fast preamplifiers for γ-ray spectroscopy. Such circuital solution has been conceived in the framework of the INFN Mars experiment, which imposes stringent requirements for both the signal-to-noise ratio and the rise time of the front-end preamplifiers. Basically, a noninverting low-gain (G) stage is interposed between the output of a conventional charge amplifier
IEEE Transactions on Nuclear Science, 2006
The capability of digital pulse shape technique to acquire data from CHIMERA detection cells (Si-... more The capability of digital pulse shape technique to acquire data from CHIMERA detection cells (Si-CsI(Tl) telescopes) has been evidenced in our previous works. We have now applied this technique to the charge discrimination of the products stopped in the silicon detectors. Large area totally depleted CHIMERA planar silicon detectors (5 cm 5 cm area, 300 m thick) in both rear and front side injection have been used. In preliminary tests full charge identification for the reaction products up to Z = 11 have been obtained for products both crossing (1E-E technique) and stopping in the silicon detector, using a 21 MeV/u 20 Ne beam at the LNS Superconducting Cyclotron in Catania. The quality of the obtained results clearly indicates that the digital signal processing approach is able to give excellent results in this application, too.
IEEE Transactions on Nuclear Science, 1998
C.Agodi', A.Bassi2, R.Bassini2, G.Bellia&#x2... more C.Agodi', A.Bassi2, R.Bassini2, G.Bellia', M.Benovic4, C.Boiano2, S.Brambilla2, R.Coniglione', L.Cosentino', P.Finocchiaro', S.Hlavac4, I.Iori2, A.Kugler3, C.Maiolino', T.Marek3, E.Migneco', P.Piattelli', R.Pleskac3, N.RabinS, P.Sapienza*, P.Shishovs, V. ...
2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2014
Nucleus, 2019
The low-energy light radioactive ion beam in-flight facility EXOTIC and the associated experiment... more The low-energy light radioactive ion beam in-flight facility EXOTIC and the associated experimental set-up,operational at Legnaro National Laboratories of the National Institute of Nuclear Physics (LNL-INFN, Italy) and designed for nuclear physics and nuclear astrophysics experiments, were described. The outline of the experimental program carried out employing the produced radioactive ion beams was presented and the perspectives of the EXOTIC project were discussed.
Abstract—In this work we have measured the performances of a 1”x1 ” sample of a CLYC scintillator... more Abstract—In this work we have measured the performances of a 1”x1 ” sample of a CLYC scintillator (Cs2LiYCl6) with 95 % en-richment of 6Li produced by RMD. Different PMT models, with borosilicate glass window or quartz window have been used. The Pulse line-shape and Pulse shape discrimination for different type of incident radiation (gamma-rays and thermal neutrons) have been investigated. The response to thermal neutrons has been measured using an AmBe source and a digital oscilloscope. A measurement of the internal radiation and the energy resolution for different gamma rays have been additionally performed. Index Terms—Cs2LiYCl6, elpasolites, neutron detectors, gamma-ray detectors, radiation detectors, scintillators, pulse
Journal of Physics: Conference Series, 2015
The study of reactions induced by exotic weakly bound nuclei at energies around the Coulomb barri... more The study of reactions induced by exotic weakly bound nuclei at energies around the Coulomb barrier had attracted a large interest in the last decade, since the features of these nuclei can deeply affect the reaction dynamics. The discrimination between different reaction mechanisms is, in general, a rather difficult task. It can be achieved by using detector arrays covering high solid angle and with high granularity that allow to measure the reaction products and, possibly, coincidences between them, as, for example, recently done for stable weakly bound nuclei [1, 2]. We investigated the collision of the weakly bound nucleus 7 Be on a 58 Ni target at the beam energy of 1.1 times the Coulomb barrier, measuring the elastic scattering angular distribution and the energy and angular distributions of 3 He and 4 He. The 7 Be radioactive ion beam was produced by the facility EXOTIC at INFN-LNL with an energy of 22 MeV and an intensity of ∼3×10 5 pps. Results showed that the 4 He yeld is about 4 times larger than
Journal of Physics: Conference Series, 2015
Esta obra está licenciada sob uma Licença Creative Commons.
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC), 2012
ABSTRACT We present a new highly integrated 16-channels pulse shape amplifier, suitable for proce... more ABSTRACT We present a new highly integrated 16-channels pulse shape amplifier, suitable for processing signals from a variety of radiation detectors: its processing capabilities range from the relatively slow signals of charge sensitive preamplifier, up to the very fast signals typical of scintillation detectors coupled to photo-multiplier tubes (PMT). The amplifier provides the pulse shape analysis using the double constant fraction discriminator technique 131 and for each channel is also present a stretcher circuit and a time to amplitude converter (TAC) section, which allow sequential readout of time and energy parameters.
2006 IEEE Nuclear Science Symposium Conference Record, 2006
ABSTRACT
EPJ Web of Conferences, 2011
The scattering processes of two mirror projectiles, the well bound 17 O (S n = 4.143 MeV) and the... more The scattering processes of two mirror projectiles, the well bound 17 O (S n = 4.143 MeV) and the loosely bound radioactive 17 F (S p = 0.600 MeV), on the proton closed shell target 58 Ni were measured at several energies around the Coulomb barrier. The experimental data were analyzed within the framework of the optical model to extract the reaction cross section and to investigate the role played by direct reaction channels at near-barrier energies. The comparison shows a similar behaviour for the two A = 17 projectiles despite their very different binding energies and suggests a rather small effect of the 17 F breakup channel on the reaction dynamics.
EPJ Web of Conferences, 2014
Elastic scattering has been studied for the collisions induced by 17 O on 58 Ni target at energie... more Elastic scattering has been studied for the collisions induced by 17 O on 58 Ni target at energies around and above the Coulomb barrier. The elastic scattering angular distributions were measured for several energies and were analyzed within the framework of the optical model to obtain total reaction cross sections. The reaction cross-sections of the tightly bound 17 O were compared with those of weakly bound 17 F on the same targets in order to investigate the effects of the low binding energy in the reaction dynamics.
2001 IEEE Nuclear Science Symposium Conference Record (Cat. No.01CH37310)
Two-point charge division is a typical technique for position measurements in linear multi-elemen... more Two-point charge division is a typical technique for position measurements in linear multi-element detectors (microstrip detectors, multi-wire proportional chambers, silicon drift detectors, scintillator arrays coupled to photodetectors). This technique makes use of only two preamplifiers connected at the right and the left ends of the detection array, each of which receives a fraction of the total charge delivered by the
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 2012
The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next g... more The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation γ-ray spectrometer. AGATA is based on the technique of γ-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a γ ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of γ-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer.
2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC), 2012
ABSTRACT Pulse pile-up, even at moderate rate of incoming events (20-30 kcps) can significantly d... more ABSTRACT Pulse pile-up, even at moderate rate of incoming events (20-30 kcps) can significantly degrade the performance of Lanthanum bromide (LaBr3) scintillators with respect to their very good energy resolution. A working array of 10 large LaBr3 detectors is available in Milano and we are currently going to improve the existing associated electronics for acquisition and data processing. As a first step, we evaluated the performance and compared advantages and drawbacks of using free running analog to digital converters (ADCs) and subsequent digital signal processing versus the more traditional technique based on analog signal shaping and peak sensing ADCs. The main goal of the optimization process is to preserve the excellent performance of LaBr3 detectors not only in controlled laboratory condition, but also during the experimental campaigns. In this work we analyze, estimate and experimentally measure the effect of pulse pile-up for LaBr3 scintillators with respect to the acquisition and processing electronics (analog or digital), for various counting rate of events. Significant improvements are achieved, both for the analog and digital approach and the associated results are presented.
Physical Review C, 2013
ABSTRACT Fusion cross sections were measured for 8B + 28Si at near-barrier energies by detecting ... more ABSTRACT Fusion cross sections were measured for 8B + 28Si at near-barrier energies by detecting the alpha particles produced in the evaporation process. The results present a small suppression with respect to one-barrier penetration model predictions, which could be attributed to incomplete fusion processes and do not differ appreciably from fusion cross sections obtained with weakly bound but stable projectiles on the same target. Comprehensive comparisons of fusion cross sections at sub- and near-barrier energies with various light weakly bound projectiles support a simple tunneling probability with slight modifications due to coupled-channel effects.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
This article was published in an Elsevier journal. The attached copy is furnished to the author f... more This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and education use, including for instruction at the author's institution, sharing with colleagues and providing to institution administration. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
The design of a preamplifier suited for BGO scintillation detectors is described. The performance... more The design of a preamplifier suited for BGO scintillation detectors is described. The performance of this device and the Compton suppression factors obtained with symmetric and asymmetric BGO-Nal anti-Compton shields are presented.
Journal of Physics: Conference Series, 2011
The reaction dynamics induced by the 17 F Radioactive Ion Beam on the protonshell closed 58 Ni ta... more The reaction dynamics induced by the 17 F Radioactive Ion Beam on the protonshell closed 58 Ni target was studied at two colliding energies slightly above the Coulomb barrier. Charged reaction products were detected at forward angles and the quasi-elastic differential cross section was analyzed within the framework of the optical model in order to extract the reaction cross section and to investigate the relevance of direct reaction channels (inelastic scattering, breakup and transfer) at near-barrier energies. The comparison with the reaction induced by double-magic tightly-bound 16 O projectiles on the same target showed that the 17 F reaction cross section is moderately enhanced at the lower secondary beam energy. Direct reaction channels were also found to be more relevant than for the corresponding 16 O-induced reaction.
IEEE Transactions on Nuclear Science, 2004
We suggest that some key physical parameters of high-purity germanium (HPGe) segmented detectors,... more We suggest that some key physical parameters of high-purity germanium (HPGe) segmented detectors, including segment capacitance and leakage current, can be derived from standard noise measurements. These parameters are relevant when designing and optimizing the front-end electronics.
IEEE Transactions on Nuclear Science, 2001
We present a new discharge mechanism for low-noise fast preamplifiers for γ-ray spectroscopy. Suc... more We present a new discharge mechanism for low-noise fast preamplifiers for γ-ray spectroscopy. Such circuital solution has been conceived in the framework of the INFN Mars experiment, which imposes stringent requirements for both the signal-to-noise ratio and the rise time of the front-end preamplifiers. Basically, a noninverting low-gain (G) stage is interposed between the output of a conventional charge amplifier
IEEE Transactions on Nuclear Science, 2006
The capability of digital pulse shape technique to acquire data from CHIMERA detection cells (Si-... more The capability of digital pulse shape technique to acquire data from CHIMERA detection cells (Si-CsI(Tl) telescopes) has been evidenced in our previous works. We have now applied this technique to the charge discrimination of the products stopped in the silicon detectors. Large area totally depleted CHIMERA planar silicon detectors (5 cm 5 cm area, 300 m thick) in both rear and front side injection have been used. In preliminary tests full charge identification for the reaction products up to Z = 11 have been obtained for products both crossing (1E-E technique) and stopping in the silicon detector, using a 21 MeV/u 20 Ne beam at the LNS Superconducting Cyclotron in Catania. The quality of the obtained results clearly indicates that the digital signal processing approach is able to give excellent results in this application, too.
IEEE Transactions on Nuclear Science, 1998
C.Agodi', A.Bassi2, R.Bassini2, G.Bellia&#x2... more C.Agodi', A.Bassi2, R.Bassini2, G.Bellia', M.Benovic4, C.Boiano2, S.Brambilla2, R.Coniglione', L.Cosentino', P.Finocchiaro', S.Hlavac4, I.Iori2, A.Kugler3, C.Maiolino', T.Marek3, E.Migneco', P.Piattelli', R.Pleskac3, N.RabinS, P.Sapienza*, P.Shishovs, V. ...
2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2014