Light charged particle and intermediate mass fragment cross-sections in GeV proton-induced reactions

Abstract

As an international collaboration PISA (Proton Induced SpAllation) has initiated measurements of total and double differential crosssections for products of spallation reactions at the proton accelerator COSY in Ju¨lich (Germany) in order to study secondary particle production created in structural, window, and target materials by proton beams up to 2.5 GeV incident kinetic energy. In the framework of Spallation Neutron Sources and accelerator-driven systems, residual nuclei (H, He up to intermediate mass fragrments) production cross-sections are of great importance for estimation of damage in target and structural materials. Reliable and comprehensive experimental data, especially for p-energies beyond 1 GeV will serve as benchmarks for code development and validation. Data taken by Bragg curve spectroscopy and silicon detector telescopes for the reaction 1.9 GeV p+Ni(Au) will be discussed and kinetic energy spectra of light ions and intermediate mass fragments will be presented. MotivationThe Proton Induced SpAllation (PISA) project aims at the measurement of total and double differential crosssections for products of spallation reactions on a various targets (C-Au), induced by protons of energies between 100 and 2500 MeV. Measurements of cross-sections and the investigation of the interaction of medium and high energy protons with atomic nuclei are important for providing benchmark data in the GeV incident p-energy range [1][2][3], understanding the complex reaction mechanism itself [3] and testing the reliability of physical models [2] describing the fast intranuclear cascade (INC) phase as well as the subsequent statistical decay from an equilibrated or thermalized hot nucleus. A particular focus is on developing new models for the description of highly energetic composite particles. These investigations play a major role in planning and construction of high intensity spallation neutron sources [4][5][6][7][8], since the production cross-sections are of particular interest for studying radiation damage in target, window and structural materials. In the astrophy-ARTICLE IN PRESS www.elsevier.com/locate/nima 0168-9002/$ -see front matter r

Differential cross sections on fragment (2 ≤ Z ≤ 9) production for carbon, aluminum and silicon induced by tens-of-MeV protons

“…The E-TOF is promising for fragment measurements, but as with the counter-telescope technique, it also has low detection efficiency problem due to the small solid angle. Other high-energy physics experimental data were recently obtained for several GeV protons [14][15][16][17], but such data are not so useful for the estimation of SEEs because the radiation flux in a practical radiation field is too low at such high energies.…”