PeTa effect
by Vitali A. Tatartchenko


The abbreviation “PeTa effect”

means Perel’man – Tatartchenko’s effect:
the physical phenomenon of infrared characteristic radiation under crystallization, sublimation, and condensation
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• Vitali A. Tatartchenko

PeTa effect

Characteristic IR radiation under crystallization, sublimation, and condensation

PeTa effect is the physical phenomenon of infrared characteristic radiation under first order phase transitions, especially during deposition and condensation of vapours/gases and crystallisation of melts.

More than 40 years ago, the effect was theoretically predicted by M. Perel’man and was investigated by V. Tatartchenko for several alkali halides and sapphire. Thus, the abbreviation “PeTa effect” means Perel’man – Tatartchenko’s effect.

The nature of the PeTa effect is that a particle (i.e., atom, molecule or/and cluster) emits transient radiation during transition from a meta-stable higher energetic level (in a super-cooled melt or super-saturated vapour) to a stable and condensed lower level (in a crystal or melt).

The radiation removes latent heat by photons with characteristic frequencies that are generated under this transition. There are numerical theoretical and experimental evidences of the PeTa effect, but additional investigations concerning atmospheric phenomena are needed.

The main objective of the experiments is to eliminate all doubts that the PeTa effect not only exists, but that the power of PeTa radiation is significant, and has to be taken into account in all calculations of energetic balance for the atmospheres of Earth and other planets.

A striking demonstration of the PeTa effect is presented: intensive infrared radiation during the deposition and condensation of air components at the temperature of liquid nitrogen, while recording the emissive spectra using an IR Fourier Spectrometer with a highly sensitive MCT (Mercury-Cadmium-Tellurium) detector.

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