Effects of the diffusive acceleration of particles by shock waves in the primordial matter of the solar system |
| |
Authors: | G K Ustinova |
| |
Institution: | 1.Vernadsky Institute of Geochemistry and Analytical Chemistry,Russian Academy of Sciences,Moscow,Russia |
| |
Abstract: | The effects of the shock wave diffusive acceleration of particles are considered in the case of formation of isotopic relations
of the anomalous Xe-HL component of xenon in relic grains of nanodiamonds in chondrites. It is shown that this component could be formed and captured
simultaneously with the nanodiamond synthesis in the conditions of the explosive shock wave propagation from supernova outbursts.
The specificity of isotopic composition of Xe-HL is due to the high hardness of the spectrum of nuclear-active particles at the shock wave front and its enrichment with heavy
isotopes. The spallogenic nature of both the anomalous and normal components of xenon is ascertained, and the role of the
subsequent evolutionary processes in the change of their isotopic systems is shown. Experimental evidence of the formation
of the power law spectrum of particles with the spectral index γ ∼ 1 by the supersonic turbulence during the carbon-detonation
supernova SnIa explosion is obtained; this perhaps opens new perspectives in studying the problem of the origin of cosmic
rays. It is shown that at the stage of free expansion of the explosive shock wave, the degree of compression of the matter
at the wave front was σ = 31 (the corresponding Mach number M ∼ 97); this led to a 31-fold increase of the magnetic field as well as of the maximum energy of accelerated particles, so
that even the energy of protons reached ∼ 3 × 1015 eV, i.e., the “knee” region. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|