Publications (6)0 Total impact
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Article: Spallation residues in the reaction 56Fe+p at 0.3A,0.5A,0.75A,1.0A, and 1.5A GeV
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ABSTRACT: The spallation residues produced in the bombardment of 56Fe at 1.5A,1.0A,0.75A,0.5A, and 0.3A GeV on a liquid-hydrogen target have been measured using the reverse kinematics technique and the fragment separator at GSI (Darmstadt). This technique has permitted the full identification in charge and mass of all isotopes produced with cross sections larger than 10-2 mb down to Z=8. Their individual production cross sections and recoil velocities at the five energies are presented. Production cross sections are compared with previously existing data and with empirical parametric formulas, often used in cosmic-ray astrophysics. The experimental data are also extensively compared with the results of different combinations of intranuclear cascade and deexcitation models. It is shown that the yields of the lightest isotopes cannot be accounted for by standard evaporation models. The GEMINI model, which includes an asymmetric fission decay mode, gives an overall good agreement with the data. These experimental data can be directly used for the estimation of composition modifications and damages in materials containing iron in spallation sources. They are also useful for improving high-precision cosmic-ray measurements.Phys. Rev. C. 04/2007; 75(4). -
Article: Spallation Residues in the Reaction 56Fe + p at 0.3, 0.5, 0.75, 1.0 and 1.5 A GeV
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ABSTRACT: The spallation residues produced in the bombardment of 56}Fe at 1.5, 1.0, 0.75, 0.5 and 0.3 A GeV on a liquid-hydrogen target have been measured using the reverse kinematics technique and the Fragment Separator at GSI (Darmstadt). This technique has permitted the full identification in charge and mass of all isotopes produced with cross-sections larger than 10^{-2} mb down to Z=8. Their individual production cross-sections and recoil velocities at the five energies are presented. Production cross-sections are compared to previously existing data and to empirical parametric formulas, often used in cosmic-ray astrophysics. The experimental data are also extensively compared to different combinations of intra-nuclear cascade and de-excitation models. It is shown that the yields of the lightest isotopes cannot be accounted for by standard evaporation models. The GEMINI model, which includes an asymmetric fission decay mode, gives an overall good agreement with the data. These experimental data can be directly used for the estimation of composition modifications and damages in materials containing iron in spallation sources. They are also useful for improving high precision cosmic-ray measurements.01/2007; -
Article: Radiation Damages Induced By Spallation Residues in ADS Window
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ABSTRACT: Isotopic distributions and recoil velocities of spallation residues produced in p+Fe reactions at several energies (300, 500, 750, 1000 and 1500 MeV) have been obtained recently using the reverse kinematics methods at GSI. The measured isotopic cross-sections allow calculating directly the chemical composition modifications expected in ADS windows after one year of operation while the recoil velocities can be used to assess the number of atom displacements (DPA). Results at different bombarding energies will be shown and compared to calculations performed with LAHET3, using standard models (actually the Bertini-Dresner combination) or the new INCL4-ABLA model (to be presented in this conference) recently implemented. Estimation of the contribution due to back-scattered particles from the target will be also discussed. -
Article: Spallation residues in the reaction ^(56)Fe + p at 0.3A, 0.5A, 0.75A, 1.0A, and 1.5A GeV
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ABSTRACT: The spallation residues produced in the bombardment of ^(56)Fe at 1.5A, 1.0A, 0.75A, 0.5A, and 0.3A GeV on a liquid-hydrogen target have been measured using the reverse kinematics technique and the fragment separator at GSI (Darmstadt). This technique has permitted the full identification in charge and mass of all isotopes produced with cross sections larger than 10^(-2) mb down to Z=8. Their individual production cross sections and recoil velocities at the five energies are presented. Production cross sections are compared with previously existing data and with empirical parametric formulas, often used in cosmic-ray astrophysics. The experimental data are also extensively compared with the results of different combinations of intranuclear cascade and deexcitation models. It is shown that the yields of the lightest isotopes cannot be accounted for by standard evaporation models. The GEMINI model, which includes an asymmetric fission decay mode, gives an overall good agreement with the data. These experimental data can be directly used for the estimation of composition modifications and damages in materials containing iron in spallation sources. They are also useful for improving high-precision cosmic-ray measurements. -
Article: Residual nuclei produced by spallation reactions
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ABSTRACT: A precise knowledge of all the isotopes produced in spallation reactions is necessary to predict induced radioactivity and chemical modifications in spallation targets. Experimental data recently obtained using the reverse kinematics technique are presented. New, more complete, preliminary experimental results on the Fe+p system are shown. These measurements of residual nuclei production in iron can be used directly to assess changes and damage created by spallation in an ADS metallic window.http://dx.doi.org/10.1051/jp4:20020323. -
Article: Measurement of residual nucleus cross sections and recoil energies in p + Fe collisions at 300, 500, 750, 1000 and 1500 MeV
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ABSTRACT: The production of residual nuclei in p + Fe collisions has been measured at GSI on the FRS facility by means of the reverse kinematic techniques at 300, 500, 750, 1000 and 1500 MeV/A. The cross-sections larger than 0.01 mb of all isotopes with Z larger than 8 have been obtained. Velocity distributions were also measured. Comparisons to models describing spallation reactions and some empirical formulae often used in astrophysics are presented. These data are directly used to calculate impurety production and DPAs in a thin window as foreseen in spallation sources or accelerator-driven systems
Top co-authors
Institutions
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2007
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California Institute of Technology
- Jet Propulsion Laboratory
Pasadena, CA, USA
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