High-let cosmic ray studies on the COSMOS 1781 satellite

Abstract

A joint investigation of high-LET cosmic particles was carried out on the outer surface of the COSMOS 1781 satellite using plastic nuclear track detectors. At a depth of 0.16g cm^-2 the flux of the cosmic particle with LET₁₀₀₀ > 1100 MeVcm²g^-1 was found to be (4.44±0.23) × 10^-6cm^-2s^-1sr^-1. The integral LET spectra of HZE particles at all investigated absorber thickness decrease according to the expression N( >LET) = K(LET)^γ, where the parameter γ depends on both LET and thickness H: in the range up to LET ≈ 1600 MeV cm² g^-1 the dependence is given by γ=-0.63−0.08H; for higher LET, i.e. LET > 2000 MeVcm²g^-1, this relationship is expressed by γ=-2.46−1.91H.