It is discussed the experimental results and their comparison with multi-source thermal model calculations by fragmentation of isotope $^{10}$C to much lighter nuclear such as $^8$Be, $^4$He and etc. Conclusions obtained basing on investigation and angle distribution analysis fragments relative direction projectile particles and also spectrum of distribution on transverse momentum of fragments...
The equations for the QED effective action derived in [3] are considered using
singular perturbation theory. The effective action is divided into regular and singular
(in coupling constant) parts. It is shown that expression for the regular part coincides
with usual Feynman perturbation series over coupling constant, while the remainder
has essential singularity at the vanishing coupling...
