Engineering Physics Annotation << Back AXIONS IN OPTICAL EXPERIMENTS V.E. OGLUZDIN Search the candidate for the role of elementary particles – the axion (A ) is carried out in different parts of the spectrum from a few electron volts (eV) to 1 MeV. The report considers two optical processes, each of which satisfi es the necessary and suffi cient conditions for the existence of the axion in the processes of interaction of light radiation and baryonic matter. According to theoretical predictions of this condition is the act of the axion decay into two photons (A ) → ν3 + ν01. Based on the experimental results previously published in the fi rst place, his works, the author puts forward the assumption, according to which in the nearly resonance interaction of optical radiation with atomic, multi-tier applications in the electric (magnetic) fi eld of an atomic nucleus is possible to isolate these parts of the spectrum, in which the merger pairs photon excitation radiation environment may contribute to the birth of axions: ν + ν → (A ). Their birth as possible with pulsed and continuous at almost resonant action of light on a environment. The facts supporting the emergence and presence of axions can serve as a new production of pairs of photons, which are absent in the exciting radiation environment: (A ) → ν3 + ν01. Born in the elementary act of two photons from the decay of the axion is a necessary and suffi cient condition for the existence of the axion. Part of the spectrum, which is available at the output of the photon detection cell with baryonic medium in optical experiments performed previously located in 1...2 eV. The paper discusses examples of such pairs of photons of birth and reason not to use a previously proposed in the work of interpretation. Key words: photon, axion, almost (nearly) resonance atomic mediа. Contacts: E-mail: ogluzdin@kapella.gpi.ru Pp. 16-21.