Method of estimating optical transmission coefficient of silicate material

FIELD: physics.

SUBSTANCE: quartz monofractions are collected and annealed to temperature of 400°C, followed by excitation of X-ray luminescence, wherein X-ray luminescence is excited in the 370 nm band and the optical transmission coefficient is estimated using a graph of conformity between X-ray luminescence intensity in the 370 nm band and optical transmission coefficient values determined using a standard technique.

EFFECT: faster and more reliable preliminary evaluation of quality of quartz material.

1 tbl, 2 dwg

 

The invention relates to the field of Geology, the development and use of mineral deposits and can be used in the early stages of geological exploration for a preliminary assessment of the quality of silicate raw materials and preliminary evaluation of transmittance. Natural silicate raw materials and obtained from him especially pure quartz concentrates are widely used in various industries high technology electronic, semiconductor, lighting, optical, and other Issues of assessing the quality of raw materials in the early stages of exploration are some of the most relevant. The most important quality indicators of silicate raw materials suitable for producing high-purity quartz concentrates, are the contents of trace elements and the light transmission ratio (LTR). There is a method of determining the transmittance of quartz grain (Method Geneics THE 21-RSFSR-790-80. Guidelines for the assessment of the quality of the quartz raw material for melting optical glass manufacturing. Annex 2, p.59-60) is similar. The method is intended for relative estimates of the number of gas-liquid inclusions in quartz by determining the transmittance of the quartz grains in the visible region of the spectrum. The essence of the method is compared and the intensity of the light fluxes, passing through the test and comparison samples. Determination of the coefficient of light transmission is carried out on visually-photoelectric photometer FM-58. For measurements used immersion liquid with a refractive index 1.543±0,002, which is prepared by mixing bromine benzol and dimethylphthalate in approximately equal proportions. As the test sample is quartz grains, the thickness of I mm, placed in a cuvette containing the immersion liquid. The sample for comparison is similar to the cuvette, filled with the immersion liquid. Measurements of transmittance on the photometer F. No. -58 carried out with filter No. 3. For each sample cuvette with quartz grains, after mixing, is three count, the average of which is taken as the final result. The disadvantage of this method is the duration of its execution and the need to work with chemical substances harmful to health. Known fluorescent method for studying the structural imperfections of quartz, namely that selected monofraktsii quartz, shoot for them spectra of rentgenolyuminestsentnye in the optical wavelength range, determine the intensity of the radiation centers of rentgenolyuminestsentnye and assess the quality quartz (Votyakov S.L., CROs is ALEV VA, Purtov VK, Krasnobaev A.A. Fluorescent analysis of structural imperfections quartz // Yekaterinburg: WITH "Science", 1993. - P.30-32). A disadvantage of the known method is that either not completely rated the role of intrinsic defects in quartz and their relationship with the transmittance. The closest in technical essence is a Way of assessing the quality of quartz raw materials (Boronowsky N.N., Badaeva NN. The method of assessing the quality of quartz raw materials. - PATENT No. 2400736. Application No. 2009129894) (prototype), including the selection of mono fractions of quartz, preliminary calcination temperatures of 350-450°C, obtaining the spectrum of rentgenolyuminestsentnye calcined quartz in the spectral wavelength range of 350-550 nm, and the subsequent evaluation of defects in the structure and quality of the quartz raw material ratio of the emission of impurities and native defects.

The present invention is to develop a method to estimate the transmittance of silicate raw materials with the aim of increasing expressnet and reliability preliminary assessment of quality of quartz raw materials. The problem is solved by the fact that, according to the prototype, is based on mono fractions of quartz, annealing to a temperature of 350-450°C, followed by excitation of rentgenolyuminestsentnye, but, unlike the prototype, rentgenolyuminestsentnye excite only in the UV band with the maximum 370 n and evaluate the transmittance, using the graph of the correspondence between the intensity of rentgenolyuminestsentnye in the band of 370 nm and a coefficient of light transmission, defined by the standard method.

The authors of the present invention experimentally found a direct correlation between the intensity of rentgenolyuminestsentnye at a wavelength of 370 nm and a light transmission ratio (LTR). Figure 1 shows the graph of the correspondence between the intensity of rentgenolyuminestsentnye in the band of 370 nm and a coefficient of light transmission, defined by the method Geneics THE 21-RSFSR-790-80, reflecting the dependence of x-ray characteristics (intensity RLfrom the transmittance. 100 relative units on a scale of intensities of rentgenolyuminestsentnye made the most intense luminescence of quartz from Kuznechikhinskaya field having a transmittance close to 100% This emission band appears in the quartz after pre-annealing in the air. Earlier it was noted that this strip may be responsible hole centers on weakly associated interstitial oxygen (Sailors I.I., Pogorelov JUL Influence of annealing on the spectra of rentgenolyuminestsentnye // Izvestiya an SSSR. Ser. GEOL. - 1977. No. 9. - S.89-94), i.e. intrinsic defects. The relationship of the band and the receipt with the amount of light transmission due to the presence in the structure of quartz impurity defects and the concentration of gas-liquid inclusions, which absorb and scatter light. The number of components of gas-liquid inclusions can act as absorbers of luminescence. The less gas-liquid inclusions and other impurities, the more intense band radar at 370 nm. This glow is characterized by a reverse correlation with the concentration of impurity defects and gas-liquid inclusions and will have a direct correlation with the amount of light transmission. Figure 2 presents a chart of the ratio of relative fluorescence characteristics (rentgenolyuminestsentnyeand the gas component from the gas-liquid inclusions in quartz of various fields. From figure 2 it is seen that the most intense luminescence centersthe Kuznechikhinskaya quartz, which is characterized by low values of the gas component and a high coefficient of transmittance. For quartz Gargano block - on the contrary, low values of intensity of luminescence centerscorrespond to the highest values of the gas component from the gas-liquid inclusions, and hence low values of transmittance, since the intensity of rentgenolyuminestsentnye centerscorrelates the amount of light transmission, which can be seen from figure 1. Below are examples of specific implemented the I of the invention (10 examples). Spectra of rentgenolyuminestsentnye was filmed with the help of the device URS-55, x-ray tube BSV-2 and monochromator MDR-12 in the laboratory of experimental and applied Mineralogy of Tomsk State University. Tests for determination of the coefficients of transmission performed in the Institute of Geochemistry Russian Academy of Sciences.

Example 1.

Preparing monoprice quartz weighing 10 mg of sample No. 1, taken from Kuznechikhinskaya deposits of very pure quartz (Ural). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=370 nm, measured its intensity in relative units, which was equal to 91 relative to the unit that the graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 88 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 1 as 88 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1, example 1.

Example 2.

Preparing monoprice quartz weighing 10 mg of sample No. 2, taken from Kuznechikhinskaya field particularly of ciscosecure (Ural). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was equal to 80 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 85 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 2 as 85 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 2.

Example 3.

Preparing monoprice quartz weighing 10 mg of sample No. 3, taken from Larin field granulated quartz (Ural). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was equal to 94 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to the transmittance, aunoma 91 relative to the unit. Thus, determined the size of the light transmission ratio (LTR) for sample No. 3 as 91. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1, example 3.

Example 4.

Preparing monoprice quartz weighing 10 mg of sample No. 4, taken from Larin field granulated quartz (Ural). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was equal to 91 unit that the graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 88 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 4 as 88 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 4.

Example 5.

Preparing monoprice quartz weighing 10 mg of sample No. 5, taken from the Kyshtym deposits of quartz (the Urals). After prior the preliminary annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measure its intensity in relative units, which was $ 70 a relative measure that on the graph of intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 81 relative to the unit. Thus, determined the size of the light transmission ratio (LTR) for sample No. 5 as 81 unit. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 5.

Example 6.

Preparing monoprice quartz weighing 10 mg of sample No. 6, taken from the Kyshtym deposits of quartz (the Urals). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was equal to 53 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 77 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 6 as 77 units. The reliability of such the distribution is confirmed by the data, obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 6.

Example 7.

Preparing monoprice quartz weighing 10 mg of sample No. 7, taken from the Sakmarian quartesolo region (Urals). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which amounted to 27 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 69 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 7 as 69 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 7.

Example 8.

Preparing monoprice quartz weighing 10 mg of sample No. 8, taken from the Sakmarian quartesolo region (Urals). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity relative to the compulsory units, which was equal to 18 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 66 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 8 of 66 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 8.

Example 9.

Preparing monoprice quartz weighing 10 mg of sample No. 9, taken from Drabyk-Karagai quartesolo region (Urals). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was $ 6 a relative measure that on the graph of intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 60 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 9 as 60 units. The validity of this definition is confirmed by the data obtained is in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 9.

Example 10.

Preparing monoprice quartz weighing 10 mg of sample No. 10, taken from Drabyk-Karagai quartesolo region (Urals). After pre-annealing up to 400°C was initiated by rentgenolyuminestsentnye in the spectral emission band with a maximum at λ=360-370 nm, measured its intensity in relative units, which was equal to 4.5 relative units, which is a graph of the dependence of the intensity of rentgenolyuminestsentnye on the value of the transmittance shown in figure 1, corresponds to a transmittance equal to 27 relative units. Thus, determined the size of the light transmission ratio (LTR) for sample No. 10 as 27 units. The validity of this definition is confirmed by the data obtained in the determination of transmittance by well-known methods Geneics THE 21-RSFSR-790-80, as shown in table 1 - example 10.

The proposed method allows you to quickly with the help of x-ray analysis on a small amount of material on a semiquantitative level to determine the coefficient of transmittance of quartz, which makes possible a preliminary assessment of the quality of silicate raw materials.

Table 1
Data for determination of the coefficient of transmittance of quartz raw materials for deposits in the Urals (Examples of the invention)
Example No.No. sampleThe intensity of rentgenolyuminestsentnye in the spectral band with maximum at 370 nm (Rel. unit)The transmittance defined by the graph of dependence of rentgenolyuminestsentnye from PSC (Rel. unit)The transmittance according to the photoelectric photometer FM-58
11918887
22808584
33949190-91
44918888
55708181
66537775
77276061
88186666
9966059
10104,52728

Assessment method transmittance of silicate raw materials, including the selection of mono fractions of quartz, annealing temperatures of 400°C, followed by excitation of rentgenolyuminestsentnye, characterized in that rentgenolyuminestsentnye stir in the band of 370 nm and evaluate the transmittance using the graph of the correspondence between the intensity of rentgenolyuminestsentnye in the band of 370 nm and a coefficient of light transmission, defined by the standard method.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: method involves preliminary concentration of trace elements from ultra-small samples of water and aqueous solutions. A microgranule of hydrophilic material is placed on a stretched radiotransparent hydrophobic film, a droplet of the analysed solution is collected and then deposited on said film to coat said microgranule. Said droplet is evaporated and the microgranule is then analysed by an X-ray fluorescent microanalyser with a focusing X-ray lens. Before placing the microgranule, the film is smeared with a liquid surfactant which is insoluble in water and aqueous solutions. 1-5% concentrated nitric acid or chloric acid is added to the droplet of the analysed solution or said droplet is taken from the analysed solution to which nitric acid or chloric acid has been added until achieving concentration thereof of 1-5%.

EFFECT: fewer analytical errors.

3 cl, 1 tbl, 8 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: qualitative and quantitative direct determination of content of elements with molar mass less than 23 in inorganic materials is carried out by association analysis of multivariate data superposed on spectra obtained by exposing the materials to X-rays, and specifically using a spectral range between 5 keV and 22 keV.

EFFECT: enabling analysis using a reliable and accurate direct determination of content of carbon in steel and alloys in non-destructive inspection conditions, without the need to switch off equipment and with possibility of use in operating conditions.

6 cl, 3 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to analytical chemistry. Disclosed is a complexing sorbent which is obtained by impregnating the surface of cellulose filters with organic complexing reagents selected from thiophene-2-carbaldehyde thiosemicarbazone or 5-nitrothiophene-2-carbaldehyde thiosemicarbazone. The sorbent is efficient for concentrating heavy metals from solutions for subsequent X-ray fluorescence determination.

EFFECT: obtaining a sorbent having high sorption capacity for a wide range of aliovalent ions and capacity for both individual and group extraction of heavy metals.

3 cl, 2 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention can be used to detect rare-earth metals Eu, Gd, Tb and Dy in soil using an X-ray radiometric method. The method involves preparing artificial reference samples with known concentration of analysed and interfering elements for plotting calibration curves, wherein intensity of analytical Kα1-lines is the procedure of deconvoluting the spectrum which overcomes the effect of layover of the β-component of lines of interfering elements on them.

EFFECT: possibility of designing a cheap, easy to implement alternative X-ray radiometric method of analysing elements Eu, Gd, Tb and Dy.

2 dwg

FIELD: physics.

SUBSTANCE: apparatus for carrying out both x-ray diffraction (XRD) and x-ray fluorescence (XRF) analysis of a crystalline sample, comprising an evacuable chamber; a sample holder located in the evacuable chamber, for mounting the crystalline sample so that it can be analysed; an XRF tube mounted in the evacuable chamber, for illuminating the crystalline sample with x-rays; an XRF detection arrangement for detecting secondary x-rays emitted from the surface of the crystalline sample as a result of illumination by x-rays from the XRF tube; an XRD tube, also mounted in the evacuable chamber but separate from the XRF tube, for illuminating the crystalline sample with x-rays; an XRD detection arrangement for detecting x-rays of a characteristic wavelength which have been diffracted by the crystalline sample; and a moveable XRD support assembly, comprising a first part configured to mount the XRD tube for movement of the XRD tube relative the sample holder, and a second part configured to mount the XRD detection arrangement for movement of the XRD detection arrangement relative the sample holder.

EFFECT: possibility of more accurately carrying out both x-ray diffraction and x-ray fluorescence analysis of a crystalline sample.

13 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: monofractions are collected and luminescence is excited therein using an X-ray tube. The X-ray luminescence spectrum is recorded in the wavelength range of 400-800 nm and based on spectral composition of radiation, marshite is determined at λ=680-730 nm, miersite is determined at λ=630-670 nm, and iodargyrite is determined from emission bands at λ=420-460 nm and 580-640 nm.

EFFECT: rapid and reliable determination of composition of minerals.

3 cl, 7 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: apparatus for X-ray radiometric analysis of the composition of pulp and solutions consists of two parts, one of which is a processing part and is embedded into the wall of a container with the analysed liquid and has a hole through which radiation passes, the second part of the apparatus is mounted outside the container and is a housing with a hole in the end part through which radiation passes, having radionuclide radiation sources and a detector, where between the processing part of the apparatus and the end part of the housing there is a chamber with cylindrically shaped helium filler, the end walls of which are made from material which weakly absorbs characteristic X-ray radiation of the analysed element. One of the end walls of the chamber is in direct contact with the window of the detector. The side surface of the chamber has two holes for blowing helium and inside the chamber there is a sensor for detecting rupture of the material of the wall of the helium chamber in contact with the analysed liquid.

EFFECT: high accuracy of analysis and wide range of analysed elements.

2 tbl, 1 dwg

FIELD: X-ray radiometric analysis.

SUBSTANCE: sample is irradiated with gamma- or x-rays with the energy below the K-edge of the tested sample's absorption right after irradiating the sample with gamma- or x-rays with the energy above the K-edge of the tested sample's absorption. The amount of radiation below the K-edge of absorption dispersed by the sample is measured, and the concentration of the analysed element is defined through the remainder of the sum of ratios of characteristic radiation of the sample's analysed element to the streams of dispersed radiation with energies above and below the said K-edge of absorption, and the value which is proportional to the sum of ratios of the characteristic radiation stream of the sample's analysed element to the streams of dispersed radiation with energies above and below the said K-edge of absorption.

EFFECT: improved analysis accuracy in complex chemical compounds.

1 dwg

FIELD: physics.

SUBSTANCE: apparatus for X-ray radiometric analysis of composition of liquid media, having a radionuclide source of radiation and a semiconductor detector with a standalone Peltier effect-based cooling system, installed in a housing which is mounted on the outer side of a vessel with the analysed medium, and having a double-layer window made from material which transmits radiation of the radionuclide source and characteristic X-ray radiation of the analysed elements, and a sensor which signals rapture of the layer of material in contact with the analysed medium, where inside the housing in a plane perpendicular to its axis there is a radiator made from heat-conducting material, which is in form of a plate with a centre hole; between the radiator and the housing there is a spacer made from solid electrically insulating heat-conducting material; a detector with a cooling system is mounted on the radiator, the head part of which, with a beryllium window for detecting radiation, is placed in the centre hole of the radiator and the hot junction of the cooling system is connected to the radiator, a digital pulsed spectrometer whose input is connected to the output of the detector, a device for transmitting digital information to a control computer, the input of which is connected to the output of the digital spectrometer, and contacts of the sensor which signals rapture of the layer of the material of the window, which is in contact with the analysed medium, are placed between layers of the material of the window and are made in form of two metallised coatings in form of two concentric circles around the hole on the surface of a plate, made from dielectric material.

EFFECT: high accuracy of analysis.

1 dwg

FIELD: chemistry.

SUBSTANCE: soil extract is obtained using nitric acid or mixture thereof with hydrogen peroxide or hydrochloric acid in open or closed systems, followed by separation of the extract from the soil residue by filtering, settling and centrifuging, evaporating and roasting the extract and X-ray spectral analysis of the dry residue, where during evaporation, 1-3 cm3 of saturated oxalic acid is added to the extract.

EFFECT: eliminating danger for personnel due to release of poisonous smoke when removing sulphuric acid residue.

FIELD: analysis of water and organic solutions.

SUBSTANCE: sensor has multi-channel structure in form of length 1 of poly-capillary pipe with through capillary, forming micro-channels, which are filled with two layers of non-mixing substances. One layer 4 is formed by water or water solution and other 3 - by organic substance. In first of said layers into micro channels micro-granules 5 of absorbent are placed.

EFFECT: higher efficiency, lower costs.

27 cl, 14 dwg

FIELD: investigating or analyzing materials.

SUBSTANCE: device comprises measuring zone made of a section of pipeline for the fluid flow, roentgen fluorescence analyzer provided with a baffle transparent for the roentgen rays and connected with the measuring zone through a cylindrical cutting-in by means of a fastening mechanism for permitting vertical movement of the roentgen fluorescence analyzer in the measuring zone, and arrangement for destructing the flow made of top and bottom flat guides. The axes of the guides intersect at an angle whose top is located in front of the roentgen-ray- transparent baffle. The device is provided with a by-pass for fluid flow whose inlet opening is positioned in the top section of the measuring zone upstream of the arrangement for destructing the flow. The outlet opening is positioned in the top section of the measuring zone downstream of the roentgen fluorescence analyzer. In the measuring zone, upstream of the outlet opening of the by-pass for fluid flow, is an additional baffle.

EFFECT: enhanced accuracy and reliability of analyzing.

1 cl, 1 dwg

FIELD: finding of mole content of metals in heterobimetal compounds.

SUBSTANCE: mole content of metals is found by X-ray fluorescent method which includes preparation of compared samples which have tested metals in known mole content. Intensity of fluorescence of any tested metal in compared samples is measured and graduation curve is built. Intensity of fluorescence of any metal is tested sample is measured and mole content of metals is determined from graduation curve. For measurement of intensity of fluorescence the absorbing layer of sample is used which layer has thickness of 250 micrometer maximum.

EFFECT: ability f conducting nondestructive inspection.

3 dwg

FIELD: the invention refers to modes of location of targets in a cloud of passive interference and may be used in locators.

SUBSTANCE: the achieved technical result of the invention is the separation of the required object (objects) in a cloud of dipoles without conducting processes of detection and identification of all targets in the cloud of a complex target. The indicated result is achieved by way of irradiating of the targets with a probing signal in the shape of an electron beam for obtaining responses from the targets due to generation in the substance mass of the target of breaking x-ray or gamma-radiation and separation of the response from the target with the help of a receiver in direct proportion to the quantity of the atoms in this target (in the limits of the depth of the run of β-electrons) and their atomic number. The passive interference is fulfilled out of frame cloth constructions, a thin aluminum wire or synthetic film covered with an aluminum layer with mass in units and quotas of a gram will give a response on several levels less than a true target with mass of several hundreds of kilograms fulfilled mainly out of steel.

EFFECT: higher efficiency.

1 dwg

FIELD: the invention refers to modes of location of targets in a cloud of passive interference and may use application in locators.

SUBSTANCE: the achieved technical result of the invention is the separation of the required object(objects) in a cloud of dipoles without conducting processes of detection and identification of all targets in the cloud of a complex target. The indicated result is achieved by way of irradiating of the targets with a probing signal with a carrier frequency in the field of x-ray or y-radiation with the purpose of receiving responses from the targets not due to the induction of currents in conducting cover of the target or due to interference but due to scattering of x-ray beams on the electronic shells of the atoms or gamma-rays atomic nucleuses of the whole mass of the substance of the target(Compton's effect) and separation because of this of a response from the target with the help of a receiver in direct proportion to the quantity of the atoms in this target, their atomic number(for scattering of x-ray radiation) or the mass figure of the nucleus(for scattering of y-radiation). The passive interference is fulfilled out of frame cloth constructions, a thin aluminum wire or synthetic film covered with an aluminum layer with mass in units and quotas of a gram will give a response on several levels less than a true target with mass of several hundreds of kilograms fulfilled mainly out of steel. The response will be at its maximum at filling the fighting equipment of the target with fissible material.

EFFECT: allows to separate a required object(objects)in the cloud of dipoles.

1 dwg

FIELD: technology for detecting rhenium, rhenium in presence of molybdenum and tungsten.

SUBSTANCE: rhenium is detected by method of roentgen-fluorescent analysis by analytical line Lβ2, preliminarily concentrating it on surface of activated coal with utilization of ultraviolet radiation.

EFFECT: possible detection of rhenium, and also rhenium in presence of molybdenum and tungsten by roentgen-fluorescent analysis method.

3 dwg

FIELD: registration of absorption spectra of small luminescent specimens.

SUBSTANCE: the absorption spectrum of small luminescent specimens is determined according to relation of intensities of light fluxes that have passed and not passed through the specimen, the luminescence of the standard specimen is used as the specimen through which the radiation flux has not passed, and the luminescence of the examined is used as the specimen through which the radiation flux has passed, and the absorption spectrum of the examined specimen is calculated according to the respective mathematical formula.

EFFECT: expanded functional potentialities due to the increase of the range of specimens suitable for measurements without special preparation of them.

5 dwg

FIELD: analysis of substance composition.

SUBSTANCE: the roentgen-radiometric analyzer of substance composition has a measurement chamber with a source of X-ray radiation, collimator and a detector, amplitude analyzer and a registering device, the measurement chamber is V-shaped, it provides for minimizing the distance between the sample and the detector, the telescopic collimator is provided with a cylindrical holder of the primary radiation filter that can rotate about its axis and move along its axis, and the sample holder can change the position of the sample relative to the radiator and detector.

EFFECT: simplified construction, provided portativity, enhanced radiation safety, expanded range of analyzed elements and enhanced sensitivity threshold without any use of helium filler at an analysis of samples of a complex substance composition.

3 dwg

FIELD: x-ray radiometric analysis of composition of pulps and solution.

SUBSTANCE: device for x-ray radiometric analysis of composition of pulps and solutions contains a source of radiation and detection block, connected to wall of vessel with substance being analyzed through a port for passage of radiation, covered by films on both sides, while external film of port, directly in contact with substance being analyzed, is made of material either already having negative electric charge, or capable of accumulating such a charge by means of friction with environment, and also, behind the inner film a contour of electro-conductive material is positioned, connected to source of negative potential of electric power block.

EFFECT: increased precision and trustworthiness of analysis of elementary composition of pulp.

1 dwg

FIELD: analytical methods.

SUBSTANCE: method comprises hydrolysis of uranium hexafluoride sample and sodium nitrite-mediated reduction of bromates into bromides, whereupon samples are formed by selective precipitation of bromide ions on thin layer of as-precipitated silver chloride followed by washing of precipitate with weak nitric acid solution and fixation thereof with polymer film, after which content of bromine is found from intensity of fluorescent emission in formed test and reference samples.

EFFECT: enabled reliable determination of bromine at a level thereof about 5 ppm based on the uranium content.

Up!