RADIOACTIVITY LOGGING AND ITS FUTURE POTENTIAL

Geophysics ◽  
1960 ◽  
Vol 25 (4) ◽  
pp. 883-890 ◽  
Author(s):  
Edwin S. Mardock
Keyword(s):  
Neutron Activation ◽  
Inelastic Scattering ◽  
Gamma Ray ◽  
Single Component ◽  
Petrophysical Properties ◽  
Neutron Inelastic Scattering ◽  
Future Developments ◽  
The Future ◽  
Future Potential ◽  
Further Development

The quantitative application of radioactivity logs for the estimation of formation petrophysical properties is dependent on certain fundamental factors which are discussed. It is difficult to avoid “hybrid” combinations of processes; for example neutron‐neutron and neutron‐gamma effects together, however, it is believed that the future of quantitative application of neutron logs depends to a large extent on the development of single component logging processes. Positive location of the sonde within the borehole for all types of logs needs further development. These improvements plus future developments in gamma‐ray spectral logs, neutron‐gamma spectral logs, neutron activation logs, and neutron inelastic scattering logs promise a bright future for radioactivity logging.

Evaluation of the Doppler-Broadening of Gamma-Ray Spectra from Neutron Inelastic Scattering on Light Nuclei

2009 ◽  
Author(s):  
Phillip C. Womble ◽  
Alexander Barzilov ◽  
Ivan Novikov ◽  
Joseph Howard ◽  
Jason Musser ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Gamma Ray ◽  
Light Nuclei ◽  
Doppler Broadening ◽  
Neutron Inelastic Scattering

scholarly journals Measurements of the gamma-quanta angular distributions emitted from neutron inelastic scattering on 28Si

2018 ◽  
Vol 177 ◽  
pp. 02002
Author(s):  
N.A. Fedorov ◽  
D.N. Grozdanov ◽  
V.M. Bystritskiy ◽  
Yu.N. Kopach ◽  
I.N. Ruskov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Gamma Radiation ◽  
Inelastic Scattering ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Recent Experimental Data ◽  
Silicon Sample ◽  
Neutron Inelastic Scattering ◽  
Neutron Method ◽  
Good Agreement

The characteristic gamma radiation from the interaction of 14.1 MeV neutrons with a natural silicon sample is investigated with Tagged Neutron Method (TNM). The anisotropy of gamma-ray emission of 1.779 MeV was measured at 11 azimuth angles with a step of ∠15°. The present results are in good agreement with some recent experimental data.

Gamma-Ray Spectrometric Analysis of Some Trace Elements in the Human Articular Disc of the Mandible

1963 ◽  
Vol 03 (02) ◽  
pp. 175-182 ◽  
Author(s):  
Bo Bergman ◽  
Rune Söremark
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Quantitative Data ◽  
Thermal Neutron Flux ◽  
Gamma Ray ◽  
Dry Weight ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Analysis ◽  
Articular Disc ◽  
Group Separation

SummaryBy means of neutron activation and gamma-ray spectrometry the concentrations in the human mandibular articular disc of the following elements have been determined: Na, Mn, Cu, Zn, Rb, Sr, Cd, W, and Au. The discs were obtained at necropsy from seven men and nine women, ranging in age from 56 to 71 years.The activation was carried out in a thermal neutron flux of about 1.7 XlO12 neutrons × cm−2 × sec.−1 for about 20 hours. A chemical group separationwas performed before the gamma-ray spectrometry. Quantitative data based on the dry weight of the cartilage samples were obtained by comparing the photo-peak area of the identified elements with those of appropriate standards.

Elemental analysis of medicinal plants from different sites by instrumental neutron activation analysis

2016 ◽  
Vol 5 (03) ◽  
pp. 4892 ◽  
Author(s):  
Ratna Raju M.* ◽  
Madhusudhana Rao P. V. ◽  
Seshi Reddy T. ◽  
Raju M. K. ◽  
Brahmaji Rao J. S. ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Medicinal Plants ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Elemental Content ◽  
Soil Composition ◽  
Gamma Ray Spectrometer ◽  
Instrumental Neutron Activation

A study was undertaken to evaluate the inorganic elements for humans in two Indian medicinal plants leaves, namely Sphaeranthus indicus, and Cassia fistula by Instrumental Neutron Activation Analysis (INAA). INAA experiment was performed by using 20 kW KAMINI Reactor at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam. The emitted gamma rays were measured using gamma ray spectrometer. The concentrations of Al, Br, Ca, Fe, K, La, Mg, Mn, Na, Sc, V and Zn were determined in the selected medicinal plants. The medicinal leaves are using in treatment of various important ailments. The elemental content in selected medicinal leaves is various proportions depending on the soil composition, location of plant specimen and the climate in which the plant grows.

Cartographic production in Russia: main stages and trends

2020 ◽  
Vol 963 (9) ◽  
pp. 30-43
Author(s):  
M.Yu. Orlov
Keyword(s):  
Chronological Order ◽  
Xviii Century ◽  
New Methods ◽  
Current State ◽  
Factors Influencing ◽  
The Future ◽  
History Of ◽  
State Enterprises ◽  
Further Development

Studying the current state of cartography and ways of further developing the industry, the role of the map in the future of the society, new methods of promoting cartographic products is impossible without a deep scientific analyzing all the paths, events and factors influencing its formation and development throughout all the historic steps of cartographic production in Russia. In the article, the history of cartographic production in Russia is considered together with the development of private, state and military cartography, since, despite some differences, they have a common technical, technological and production basis. The author describes the stages of originating, formation and growth of industrial cartographic production from the beginning of the XVIII century until now. The connection between the change of political formations and technological structures with the mentioned stages of maps and atlases production is considered. Each stage is studied in detail, a step-by-step analysis was carried out, and the characteristics of each stage are described. All the events and facts are given in chronological order, highlighting especially significant moments influencing the evolution of cartographic production. The data on the volumes of printing and sales of atlases and maps by commercial and state enterprises are presented. The main trends and lines of further development of cartographic production in Russia are studied.

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