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The possibility of development of noninvasive medicine diagnostics method of pulmonary diseases on the base of exhaled breath analysis with using the nonstationary THz spectroscopy is considered. The results of application of nonstationary gas spectroscopy method for monitoring of the radiation therapy of oncological patients are carried out.
We study a behavior of quantum two-level system, interacting with noisy phase-diffusion field. The dynamics is shown to split into two regimes, determined by the coherence time of the phase-diffusion field. For both regimes we present a model of quantum system behavior and discuss possible applications of the obtained effect for spectroscopy. In particular, the obtained analytical formula for the...
The possibility of applying the developed gas spectroscopy method with phase-switching radiation in subTHz frequency range for spectral investigation of superecotoxicants and pollutants has been shown. The molecular spectra of the 2-chlorovinyldichloroarsine impurity composition and the products of 2-chlorovinyldichloroarsine decomposition have been investigated.
The possibilities of advance of molecular beam spectroscopy methods to mm and sub-mm ranges for using in analytical and spectroscopy investigations requiring the high sensitivity (~1-10 ppb) are considered. The experimental data verifying possibility of absorption coefficient gain (NO ~104) with using molecular beam are presented.
Analytical and numerical calculations of spectrum of two-level system, interacting with stochastic fields are presented. For the stochastic fields we consider two cases: phase-diffusion and colored-noise field of arbitrary intensity. The special attention is given to Rytov fields.
The possibilities of using of the microwave gas spectroscopy method for investigation and analysis of exhaled air are considered. The results of tests measurements in 2-mm range are presented. The prospects of investigations in teraherz and subteraherz ranges are shown.
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