The Cross Section of the Inelastic Interaction of Protons with the Tungsten Obtained with the PAMELA Space Experiment
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ELEMENTARY PARTICLES AND FIELDS Experiment
The Cross Section of the Inelastic Interaction of Protons with the Tungsten Obtained with the PAMELA Space Experiment O. A. Golub1)* , A. G. Mayorov1)** , S. Koldobskiy1), V. Malakhov1), and R. F. Yulbarisov1) (on behalf of the PAMELA Сollaboration) Received August 19, 2019; revised August 19, 2019; accepted August 19, 2019
Abstract—We present the energy dependence of the cross section for the inelastic interaction of protons with tungsten in the energy range from an order of 1 to hundred GeV using the data of the PAMELA space experiment. It was intended for the precision measurements of the cosmic ray fluxes of different nature and include a set of detectors for the reliable determination of the particle characteristics. We present the comparison of the obtained results with the measurements at accelerators and with existing theoretical models. The results of the work can be demanded for the development of numerical models describing particles’ interactions. DOI: 10.1134/S1063778819660219
1. INTRODUCTION Today Geant4 software package is one of the main tools for simulation of the passage of particles through matter [1]. It has been used in applications in particle physics, nuclear physics, accelerator design, space engineering and medical physics and in many other applied researches. One of the problems of simulation of the passage of particles through matter in Geant4 is the lack of a single ready-made model that can be used to experimentally describe the interaction of particles with matter with energies from several keV to several TeV. The work on the improvement and development of Geant4 models is closely connected with the acquisition of new experimental data on the interaction of particles with matter and subsequent comparison with the results of simulation. Today, similar work is being done, but using data only from ground-based accelerator complexes, where a limited set of incident particles with several fixed energies is available [2–4]. Cosmic rays are a natural accelerator of elementary particles, which includes a continuous energy spectrum of particles and all stable nuclei, due to which the existing series of experimental data for constructing numerical models obtained at accelerator complexes can be substantially supplemented. The PAMELA satellite experiment [5], designed to 1)
National Research Nuclear University MEPhI, Moscow, Russia. * E-mail: [email protected] ** E-mail: [email protected]
measure the fluxes of charged particles, due to its set of detectors, selects the necessary components from particle fluxes with high reliability, forming a beam of particles of a known type and energy coming at a known angle. At the same time, another detector— a position-sensitive band calorimeter with a tungsten absorber—serves as a target for these particles. The paper presents the energy dependences of the cross section for the inelastic interaction of protons with tungsten nuclei in the energy range from several hundred MeV to hundreds of GeV, obtained by proc
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