Determination of efficiency of an aged HPGe detector for gaseous sources by self absorption correction and point source methods

2017 ◽  
Vol 12 (07) ◽  
pp. T07006-T07006 ◽  
Author(s):  
R. Sarangapani ◽  
M.T. Jose ◽  
T.K. Srinivasan ◽  
B. Venkatraman
Keyword(s):  
Point Source ◽  
Hpge Detector ◽  
Absorption Correction

scholarly journals Determination of relative and absolute efficiency functions in the range of 122 keV ÷ 8.5 MeV of HPGe detector

2015 ◽  
Vol 18 (2) ◽  
pp. 79-87
Author(s):  
Son An Nguyen ◽  
Lanh Dang ◽  
Minh Van Truong
Keyword(s):  
Quantitative Analysis ◽  
Neutron Activation ◽  
Point Source ◽  
Energy Range ◽  
Hpge Detector ◽  
Nuclear Reactor ◽  
Absolute Efficiency ◽  
Gamma Sources ◽  
Reaction 35Cl

Construction of detector is necessary. However, on large energy range the manufacturers could not also support the explicit function of relative and absolute efficiencies of detectors. One of the reasons is a restriction of energy range of gamma sources (normally < 3 MeV). This paper presents the results of construction of relative and absolute efficiency functions within a range from 122 keV to 8.5 MeV. The sources are used combining 152Eu point source and 36Cl activated isotope by thermal neutron captured reaction 35Cl of Dalat nuclear reactor (DNR) by 35Cl(n, γ)36Cl reaction. This result can be applied in determining quantitative analysis of samples of neutron activation and radioactivity chemistry

Development of a Technique for the Calibration of HPGe Detector to Estimate Radionuclides Present in Steel Samples

2013 ◽  
Vol 794 ◽  
pp. 766-770
Author(s):  
Sarbjit Singh ◽  
Amol Mhatre
Keyword(s):  
Point Source ◽  
Hpge Detector ◽  
Environmental Safety ◽  
Point Sources ◽  
Efficiency Calibration ◽  
Detector System ◽  
Steel Disk ◽  
System A ◽  
Disk Sample

The quantitative assay of radionuclides present in steel samples is required for the environmental safety as well as in the process control and quality control of the finished products. The standard sources should also be prepared in the required size and shape as that of the sample, for the efficiency calibration of the HPGe detector system. A method was developed and tested to use 152Eu point source for the determination of efficiency of an extended steel disk source using HPGe detector system. Standard point sources of 152Eu were prepared by transferring known amount of 152Eu activity by weight. Standard steel disk sources of required dimensions were also prepared by distributing uniformly the standard activity of 152Eu on both sides of the inactive steel disk. The extrapolated efficiency of the steel disk sample was determined using the efficiency of the 152Eu point source and it was compared with the efficiency determined using the standard sources of 152Eu prepared on the steel disks. The two efficiency calibration curves matched very well within the experimental limits. Using this efficiency calibration, a few steel samples were analyzed for the radionuclides present in them. The detections limits for most of the nuclides were much less than the specified limits. The method can further be extended for other types of geometries with suitable modifications for the changes in thickness and attenuation corrections.

Determination of point source mechanisms

2014 ◽  
pp. 108-134 ◽  
Author(s):  
Agustin Udias ◽  
Raul Madariaga ◽  
Elisa Buforn
Keyword(s):  
Point Source ◽  
Source Mechanisms

scholarly journals Absorbance Correction Method for Simultaneous Estimation of Nifedipine and Metoprolol Succinate in Their Synthetic Mixture Using From Spectrophotometry

2015 ◽  
Vol 1 (3) ◽  
pp. 151
Author(s):  
Sojitra Rajanit ◽  
Paras Virani ◽  
Hashumati Raj
Keyword(s):  
Accurate Method ◽  
Correction Method ◽  
Synthetic Mixture ◽  
Simultaneous Estimation ◽  
Metoprolol Succinate ◽  
Absorption Correction ◽  
Ich Guidelines ◽  
Development And Validation ◽  
Tablet Dosage

A new simple, economical, precise and accurate method are described for the simultaneous determination of Nifedipine (NIF) and Metoprolol Succinate (MET) in combined tablet dosage form. The proposed method was applied for the determination of Nifedipine and Metoprolol Succinate in synthetic mixture, for determination of sampling wavelength, 10?g/ml of each of NIF and MET were scanned in 200-400 nm range and sampling wavelengths were 313nm for NIF and 275.40nm for MET are selected for development and validation of absorption correction method. For this method linearity observed in the range of 5-25?g/ml for NIF and 25-125?g/ml for MET, and in their pharmaceutical formulation with mean percentage recoveries 100.68 and 100.33, respectively. The method was validated according to ICH guidelines and can be applied for routine quality control testing.

Determination of the HPGe detector efficiency in measurements of radioactivity in extended environmental samples

2017 ◽  
Vol 130 ◽  
pp. 34-42 ◽  
Author(s):  
Diango M. Montalván Olivares ◽  
M.V. Manso Guevara ◽  
Fermin G. Velasco
Keyword(s):  
Environmental Samples ◽  
Hpge Detector ◽  
Detector Efficiency

Use of Multiple Standards for Absorption Correction and Quantitation with Frieda

1973 ◽  
Vol 17 ◽  
pp. 269-278
Author(s):  
P. S. Ong ◽  
E. L. Cheng ◽  
G. Sroka
Keyword(s):  
Dry Mass ◽  
High Energy ◽  
Exciting Radiation ◽  
X Ray ◽  
Mass Absorption ◽  
Iron Copper ◽  
Absorption Correction ◽  
Radiation Induced ◽  
Fluorescence Radiation

AbstractThe computerized fluorescence radiation induced energy dispersive analyzer (FRIEDA) (1) described earlier uses an x-ray beam with a well defined energy for the excitation of fluorescence radiation, and an Si(Li) detector to measure the total x-ray spectra emitted. Such a system can also simultaneously provide supplemental data for the determination of the dry mass and the sample mass absorption which is necessary for accurate quantitation of the results. This instrumental capabillty has been utilized in the measurement of the trace elements iron, copper, and zinc in serum.Known amounts of two elements are thoroughly mixed with the sample. One element has a ‘high energy’ K line, the other a ‘low energy’ K line. The ratio of these intensities, in the absence of absorption, is a known constant and dependent only on the relative amounts of the respective elements, and on the energy of the exciting radiation. Whenever absorption is present, the ratio will change in a manner directly related to the mass absorption of the sample for these radiations.

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