Channeling radiation, physics

CHANNELING RADIATION ATOMIC AND MOLECULAR PHYSICS IN ONE AND TWO DIMENSIONS... 

Many experiments in atomic physics are designed to test the fundamental concepts of quantum mechanics. In this section I will describe some recent experiments which demonstrate the applicability of these concepts to one and two dimensional systems. Although the first experimental result on channeling radiation were just published in 1979 a considerable body of information has been obtained and we can only give a brief outline of some aspects of the work in this paper. 

The concentration of silver nanoparticles and ions in solntions was determined by neutron activation analysis [15]. Samples were irradiated in the nuclear reactor at the Institute of Nuclear Physics, Tashkent, Uzbekistan. The product of nuclear reaction ° Ag(n,y)" Ag has the half-life Tj j=253 days. The silver concentration was determined by measnring the intensity of gamma radiation with the energy of 0.657 MeV and 0.884 MeV emitted by "" Ag. A Ge(Li) detector with a resolution of about 1.9 keV at 1.33 MeV and a 6,144-channel analyzer were used for recording gamma-ray quanta. 

Result no. 4 is physically trivial because it follows from the enabled channelling of the virtual solar energy into the synthetic reactions. However, the increase in the relative fraction of longer, nucleobase-carrying polymers solely in response to switching on the UV protection (result no. 3) is not trivial at all, because in this case the utilization of radiation energy for synthesis was not permitted . Here, the increase in the fraction of complex polymers was due to the breakage of the... 

UDZHG-20R is intended for measurement of volumetric activity of gamma-radiating nuclides in fluid and operates with the standard electronic and physical equipment. In the working position the measuring box of the device is connected to the circuit under control with help of nozzles forming the bypass line. Principle of operation of the device and possibility of its introduction into the channel of information and measurement system are similar, as a whole, to UDPG-04R. 

Physical choices of the exit rates and the radiative constants equivalence of different models. The choice of the exit rates in the discrete site method and the k s in the radiation boundary method depends on the physical problem under consideration. For channel transport, they can be determined from the coupling of the quasi one-dimensional diffusion inside the channel to the three dimensional diffusion outside. This can be performed either in the forward [79] or the backward [89] formalism and results in A = in the radiation boundary condition method... 

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