ИССЛЕДОВАТЕЛЬСКИЕ ПРОЕКТНЫЕ РАБОТЫ ШКОЛЬНИКОВ ПО ЯДЕРНОЙ ФИЗИКЕ НА ТЕМУ «АДИАЦИОННЫЙ МОНИТОРИНГ»

2021 ◽  
Author(s):  
М.Д. Билетов ◽  
И.М. Зверева ◽  
А.А. Зыкина ◽  
В.В. Радченко ◽  
О.В. Раша ◽  
...  
Keyword(s):  
Simultaneous Measurement ◽  
Background Radiation ◽  
Vladimir Region ◽  
Spatial Movement ◽  
School Research ◽  
Local Measurements

Анализируются некоторые результаты школьных исследовательских проектных работ по изучению мощности радиационного фона: во Владимирской области, московском метро и атмосфере при стратосферном полете. Обсуждаются методы повышения точности дозиметрических измерений: одновременное измерение несколькими дозиметрами при пространственном перемещении прибора и увеличение длительности измерений при локальных измерениях. Some results of school research works on studying the background radiation are analyzed: in the Vladimir region, in Moscow metro and in the atmosphere during stratospheric flight. Methods for improving the accuracy of dosimetric measurements are discussed: simultaneous measurement by several dosimeters during the spatial movement of the device and increasing the duration of measurements during local measurements.

Internal Standardization in Mössbauer Spectrometry

1971 ◽  
Vol 25 (4) ◽  
pp. 472-474 ◽  
Author(s):  
P. A. Pella ◽  
J. R. DeVoe
Keyword(s):  
Simultaneous Measurement ◽  
Gamma Ray ◽  
Background Radiation ◽  
Internal Standard ◽  
Mössbauer Spectrometry ◽  
Background Contribution ◽  
Mossbauer Spectrometry ◽  
Internal Standardization

The concept of internal standardization is applied to Mössbauer spectrometry using SnO2 and β-Sn as analyte and internal standard absorbers, respectively. One of the difficulties encountered in using the Mössbauer technique for assay work is that the Mössbauer gamma ray is accompanied by background radiation. Through simultaneous measurement of the analyte and internal standard absorbers, the background contribution can be eliminated.

Identification of Asbestos Fibres in a Water Sample by X-Ray Microanalysis

1975 ◽  
Vol 33 ◽  
pp. 274-275
Author(s):  
K. A. Brookes ◽  
D. Finbow ◽  
Madeleine Samuel
Keyword(s):  
Water Sample ◽  
Background Radiation ◽  
X Ray ◽  
Left Hand ◽  
Transmission Imaging ◽  
Different Types ◽  
Normal Specimen ◽  
Liquid Nitrogen Cooling ◽  
Normal Transmission ◽  
Additional Port

Investigation of the particulate matter contained in the water sample, revealed the presence of a number of different types and certain of these were selected for analysis.An A.E.I. Corinth electron microscope was modified to accept a Kevex Si (Li) detector. To allow for existing instruments to be readily modified, this was kept to a minimum. An additional port is machined in the specimen region to accept the detector, with the liquid nitrogen cooling dewar conveniently housed in the left hand cupboard adjacent to the microscope column. Since background radiation leads to loss in the sensitivity of the instrument, great care has been taken to reduce this effect by screening and manufacturing components that are near the specimen from material of low atomic number. To change from normal transmission imaging to X-ray analysis, the special 4-position specimen rod is inserted through the normal specimen airlock.

Digital x-ray mapping of nanometer-size supported bimetallic catalysts

1988 ◽  
Vol 46 ◽  
pp. 530-531
Author(s):  
L. T. Germinario
Keyword(s):  
Background Radiation ◽  
Metal Cluster ◽  
Single Element ◽  
Beam Diameter ◽  
X Rays ◽  
X Ray ◽  
Major Interest ◽  
Induced Changes

Understanding the role of metal cluster composition in determining catalytic selectivity and activity is of major interest in heterogeneous catalysis. The electron microscope is well established as a powerful tool for ultrastructural and compositional characterization of support and catalyst. Because the spatial resolution of x-ray microanalysis is defined by the smallest beam diameter into which the required number of electrons can be focused, the dedicated STEM with FEG is the instrument of choice. The main sources of errors in energy dispersive x-ray analysis (EDS) are: (1) beam-induced changes in specimen composition, (2) specimen drift, (3) instrumental factors which produce background radiation, and (4) basic statistical limitations which result in the detection of a finite number of x-ray photons. Digital beam techniques have been described for supported single-element metal clusters with spatial resolutions of about 10 nm. However, the detection of spurious characteristic x-rays away from catalyst particles produced images requiring several image processing steps.

Simultaneous Measurement of Bend Direction and Degree of Curvature using Micromachined Grating Fibers

2014 ◽  
Vol 134 (3) ◽  
pp. 41-46
Author(s):  
Hironori Kumazaki ◽  
Munehiro Hiramatsu ◽  
Hisakazu Oguri ◽  
Seiki Inaba ◽  
Kazuhiro Hane
Keyword(s):  
Simultaneous Measurement

Cosmological Consequences with Randers Conformal of Finsler space

2007 ◽  
Vol 3 (2) ◽  
pp. 203-211
Author(s):  
Arunesh Pandey ◽  
R K Mishra
Keyword(s):  
Background Radiation ◽  
Finsler Space ◽  
Space Time ◽  
Anisotropic Model ◽  
Microwave Background ◽  
Microwave Background Radiation

In this paper we study an anisotropic model of space – time with Finslerian metric. The observed anisotropy of the microwave background radiation is incorporated in the Finslerian metric of space time.

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