R. Pizzone - Academia.edu (original) (raw)

Papers by R. Pizzone

The in flight production of a secondary 8 Li radioactive beam using the existing beam transport l... more The in flight production of a secondary 8 Li radioactive beam using the existing beam transport lines at the SMP13 Tandem accelerator of the Laboratori Nazionali del Sud in Catania is studied. The method consists in the momentum filtering by a switching magnet of the 8 Li ions emitted backward in the centre of mass of the 2 H( 7 Li,p) 8 Li reaction, followed by a time-of-flight tagging of the deflected ions. Details of the experimental procedures and preliminary results of the 8 Li( 4 He,n) 11 B reaction study relevant for pregalactic nucleosynthesis are presented and discussed. r

Physical Review Letters, 2008

Physical Review C, 2013

The Trojan horse nucleus invariance for the binary d(d, p)t reaction was tested by means of an ex... more The Trojan horse nucleus invariance for the binary d(d, p)t reaction was tested by means of an experiment using the quasifree 2 H( 6 Li,pt) 4 He and 2 H( 3 He,pt)H reactions after 6 Li and 3 He breakup, respectively. The astrophysical S(E) factor for the d(d, p)t binary process was extracted from the present data in the framework of the plane wave approximation applied to the two different breakup schemes. The obtained results are compared with direct data as well as with previous indirect investigations. The very good agreement confirms the applicability of the plane wave approximation and suggests the independence of the binary indirect cross section on the chosen Trojan horse nucleus also for the present case.

Physical Review C, 2008

ABSTRACT

Physical Review C, 2004

The 11 B ( p, alpha0 ) 8Be reaction was studied from 1 MeV down to astrophysical energies by mean... more The 11 B ( p, alpha0 ) 8Be reaction was studied from 1 MeV down to astrophysical energies by means of the Trojan-horse method applied to the 2H ( 11 B , alphao 8Be ) n three-body reaction performed at an incident energy of 27 MeV . Coincidence spectra measured in a kinematically complete experiment show the presence of the

Physical Review C, 2007

The low-energy bare-nucleus cross section for 15 N(p, α) 12 C is extracted by means of the Trojan... more The low-energy bare-nucleus cross section for 15 N(p, α) 12 C is extracted by means of the Trojan horse method applied to the 2 H( 15 N,α 12 C)n reaction at E beam = 60 MeV. For the first time we applied the modified half-offenergy-shell resonant R-matrix method that takes into account off-energy-shell effects and initial-and final-state interactions. In particular it has been shown that inclusion of Coulomb 15 N-d scattering and off-shell effects do not affect the determination of the astrophysical factor. Also the simple plane-wave approximation used in previous analyses is justified. The results extracted via the Trojan horse method are compared to direct data in the same energy region and show very good agreement in the energy interval 70-312 keV. These results confirm the extrapolations of the S factor reported in literature.

Nuclear Physics A, 2004

The Trojan-Horse Method has been applied to the three-body d('Li,a3He)n break-up reaction in orde... more The Trojan-Horse Method has been applied to the three-body d('Li,a3He)n break-up reaction in order to extract the bare nucleus S(E) factor for the 6Li(p,cr)3He down to astrophysical energies.

The European Physical Journal A - Hadrons and Nuclei, 2004

The cross-section of 8 Li( alpha\alpha alpha ,n) 11 B has been measured at ErmcmE_{\rm cm}Ermcm = 1.25 MeV to be ... more The cross-section of 8 Li( alpha\alpha alpha ,n) 11 B has been measured at ErmcmE_{\rm cm}Ermcm = 1.25 MeV to be sigma(E)=500\sigma (E) = 500sigma(E)=500 mb using novel techniques, i.e. a 8 Li radioactive ion beam produced at the tandem in Catania in combination with a 4 He gas cell and a 4pi4\pi 4pi neutron detector. The value is in

The 2H(d,p)3H and 2H(d,n)3He reactions have been indirectly studied by means of the Trojan Horse ... more The 2H(d,p)3H and 2H(d,n)3He reactions have been indirectly studied by means of the Trojan Horse Method applied to the quasi-free 2H(3He, p3H)1H 2H(3He, n3He)1H reaction at 18 MeV of beam energy. This is the first experiment where the spectator (here 1H) has been detected in coincidence with the charged participant, avoiding the limitations of standard neutron detectors. The d − d relative

The in flight production of a secondary 8 Li radioactive beam using the existing beam transport l... more The in flight production of a secondary 8 Li radioactive beam using the existing beam transport lines at the SMP13 Tandem accelerator of the Laboratori Nazionali del Sud in Catania is studied. The method consists in the momentum filtering by a switching magnet of the 8 Li ions emitted backward in the centre of mass of the 2 H( 7 Li,p) 8 Li reaction, followed by a time-of-flight tagging of the deflected ions. Details of the experimental procedures and preliminary results of the 8 Li( 4 He,n) 11 B reaction study relevant for pregalactic nucleosynthesis are presented and discussed. r

Physical Review Letters, 2008

Physical Review C, 2013

The Trojan horse nucleus invariance for the binary d(d, p)t reaction was tested by means of an ex... more The Trojan horse nucleus invariance for the binary d(d, p)t reaction was tested by means of an experiment using the quasifree 2 H( 6 Li,pt) 4 He and 2 H( 3 He,pt)H reactions after 6 Li and 3 He breakup, respectively. The astrophysical S(E) factor for the d(d, p)t binary process was extracted from the present data in the framework of the plane wave approximation applied to the two different breakup schemes. The obtained results are compared with direct data as well as with previous indirect investigations. The very good agreement confirms the applicability of the plane wave approximation and suggests the independence of the binary indirect cross section on the chosen Trojan horse nucleus also for the present case.

Physical Review C, 2008

ABSTRACT

Physical Review C, 2004

The 11 B ( p, alpha0 ) 8Be reaction was studied from 1 MeV down to astrophysical energies by mean... more The 11 B ( p, alpha0 ) 8Be reaction was studied from 1 MeV down to astrophysical energies by means of the Trojan-horse method applied to the 2H ( 11 B , alphao 8Be ) n three-body reaction performed at an incident energy of 27 MeV . Coincidence spectra measured in a kinematically complete experiment show the presence of the

Physical Review C, 2007

The low-energy bare-nucleus cross section for 15 N(p, α) 12 C is extracted by means of the Trojan... more The low-energy bare-nucleus cross section for 15 N(p, α) 12 C is extracted by means of the Trojan horse method applied to the 2 H( 15 N,α 12 C)n reaction at E beam = 60 MeV. For the first time we applied the modified half-offenergy-shell resonant R-matrix method that takes into account off-energy-shell effects and initial-and final-state interactions. In particular it has been shown that inclusion of Coulomb 15 N-d scattering and off-shell effects do not affect the determination of the astrophysical factor. Also the simple plane-wave approximation used in previous analyses is justified. The results extracted via the Trojan horse method are compared to direct data in the same energy region and show very good agreement in the energy interval 70-312 keV. These results confirm the extrapolations of the S factor reported in literature.

Nuclear Physics A, 2004

The Trojan-Horse Method has been applied to the three-body d('Li,a3He)n break-up reaction in orde... more The Trojan-Horse Method has been applied to the three-body d('Li,a3He)n break-up reaction in order to extract the bare nucleus S(E) factor for the 6Li(p,cr)3He down to astrophysical energies.

The European Physical Journal A - Hadrons and Nuclei, 2004

The cross-section of 8 Li( alpha\alpha alpha ,n) 11 B has been measured at ErmcmE_{\rm cm}Ermcm = 1.25 MeV to be ... more The cross-section of 8 Li( alpha\alpha alpha ,n) 11 B has been measured at ErmcmE_{\rm cm}Ermcm = 1.25 MeV to be sigma(E)=500\sigma (E) = 500sigma(E)=500 mb using novel techniques, i.e. a 8 Li radioactive ion beam produced at the tandem in Catania in combination with a 4 He gas cell and a 4pi4\pi 4pi neutron detector. The value is in

The 2H(d,p)3H and 2H(d,n)3He reactions have been indirectly studied by means of the Trojan Horse ... more The 2H(d,p)3H and 2H(d,n)3He reactions have been indirectly studied by means of the Trojan Horse Method applied to the quasi-free 2H(3He, p3H)1H 2H(3He, n3He)1H reaction at 18 MeV of beam energy. This is the first experiment where the spectator (here 1H) has been detected in coincidence with the charged participant, avoiding the limitations of standard neutron detectors. The d − d relative