The kinetic energy distributions of μ− p and π− p atoms at a time of the radiative np→1s transitions and charge-exchange reaction (in case of π− p) have been studied in the improved version of extended standard cascade model (ESCM). Ab initio quantum-mechanical calculations of the differential and integral cross sections of the elastic scattering, Stark transitions, Coulomb deexcitation (CD), and induced absorption (in case of pionic hydrogen) have been performed in a framework of the close-coupling approach for the states of exotic atoms with \(n\leqslant 8\) and relative motion energies \(E \geqslant 0.0001\) eV. The calculated X-ray yields and kinetic energy distributions are in good agreement with the known experimental data. The initial (n, l, E)-distributions of the exotic atoms and target motion are explicitly taken into account.
Muonic and pionic hydrogen Scattering processes Atomic cascade
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