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Resonant e+e- pair production by an electron in a magnetic field near the process threshold has been analytically studied. Using the Nikishov's theorem, an estimation of the number of events has been made in the magnetic field equivalent to laser wave in the SLAC experiment, [D. Burke et al, Phys. Rev. Lett. 79, 1626 (1997)]. The obtained estimation is in reasonable agreement with the experimental data. [ABSTRACT FROM AUTHOR]

A kinetic model is proposed for describing the shape of an atomic absorption signal in the case of first-order kinetics. The formation energy of free copper ions (87 x 7 kJ/mol) and other kinetic parameters of an atomic absorption signal of copper at 2273–3073 K were determined from the experimental data.