30TH INTERNATIONAL COSMIC RAY CONFERENCE Primary and secondary contributions to arriving abundances of cosmic-ray nuclides
نویسندگان
چکیده
The arriving abundances of a variety of cosmic-ray nuclides consist of comparable amounts of primary material produced by stellar nucleosynthesis and secondary matter resulting from fragmentation of heavier nuclei by collisions during interstellar propagation. We discuss a technique for extracting the primary and secondary contributions that takes advantage of energy spectra of individual nuclides available from the Advanced Composition Explorer mission, a data base of measured and calculated fragmentation cross sections, and the leaky box model of interstellar propagation.
منابع مشابه
Geomagnetic Field Eect over Azimuth Anisotropy of Cosmic Rays via Study of Primary Particles
Geomagnetic field is a one of the candidates for creation of anisotropy in azimuth distribution of extensive air showers over the entered cosmic rays to the atmosphere. Here we present the question: Is there any azimuth anisotropy flux in the upper level of the atmosphere due to the geomagnetic field over the entered cosmic-rays? The obtained answer is: yes. This investigation showed an agreeme...
متن کامل30TH INTERNATIONAL COSMIC RAY CONFERENCE Propagation of High-Energy Cosmic Rays through the Galaxy: Discussion and In- terpretation of TRACER Results
Abstract: The long-duration balloon flights of TRACER provide new measurements of the intensities and energy spectra of the arriving cosmic-ray nuclei with 5 ≤ Z ≤ 26 at high energies. In order to determine the particle composition and energy spectra at the cosmic-ray sources, changes occurring during the interstellar propagation of cosmic rays must be known. We use a simple propagation model w...
متن کامل30TH INTERNATIONAL COSMIC RAY CONFERENCE Direct Measurements, Acceleration and Propagation of Cosmic Rays
This paper summarizes highlights of the OG1 session of the 30th International Cosmic Ray Conference, held in Merida (Yucatan, Mexico). The subsessions (OG1.1, OG1.2, OG1.3, OG1.4 and OG1.5) summarized here were mainly devoted to direct measurements, acceleration and propagation of cosmic rays.
متن کاملA study on the lateral distribution of Cherenkov light in extensive air showers
The dependence of the lateral distribution of Cherenkov light in simulated extensive air showers to the energy and the mass of the primary cosmic rays has been studied. It has been shown that a previous claim about mass independent proportionality of shower energy to the total Cherenkov photon number is not valid in energies below EEAS ~ 1014 eV. We have found that the core distance of the so c...
متن کامل30TH INTERNATIONAL COSMIC RAY CONFERENCE Electric Storm Effects on the Soft and Hard Cosmic Ray Components Observed in Mexico City
The effects of thunderstorms on the electromagnetic and muon components of the cosmic ray secondary flux were studied during severe storms obtained in 2004, analyzing the variations of the counting rates shown in the upper and lower scintillators of the muon telescope installed in Mexico City and considering the data of storms report for the international airport of Mexico City.
متن کامل