Method for determining the emission intensity of gamma radiation from a radioelement

A radioactive element and gamma ray technology, applied in the field of measuring the gamma ray emission intensity of radioactive elements, can solve problems such as uncertainty of the restricted decay rate and short lifespan

Inactive Publication Date: 2012-01-25
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when determining gamma emission intensities, and in particular when normalizing these data, the precision obtained is highly related to the radioactive purity of the radionuclide species under study, which also constrains the uncertainty in the decay rate
Therefore, this method proved to be tricky to implement for short-lived radionuclides, on the order of minutes to hours, given the time required to prepare samples
This is also a practical disadvantage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining the emission intensity of gamma radiation from a radioelement
  • Method for determining the emission intensity of gamma radiation from a radioelement
  • Method for determining the emission intensity of gamma radiation from a radioelement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] figure 1 depicts a block diagram of the method for determining gamma ray intensity of the present invention, and figure 2 describe figure 1 A block diagram of a series of specific steps in the method of the present invention.

[0035] The method of the present invention comprises (see figure 1 ): step E1, the sample Ech 1 and a standard sample Ech 2 Installed into an oscillating rod, sample Ech 1 The gamma radiation intensity I(Ech 1 ) will be determined, while the standard sample Ech 2 The gamma radiation intensity I(Ech 2 ) is known; step E2, will be equipped with sample Ech 1 and Ech 2 The vibrating rod is installed in a nuclear reactor; step E3, for the sample Ech placed in the nuclear reactor 1 and Ech 2 performing the irradiation; step E4, removing the irradiated sample from the nuclear reactor; step E5, measuring the gamma ray net area of ​​the irradiated sample (a measure of gamma ray area) and shaping this net area measurement to obtain A net area ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A method for determining the intensity I(Ech1) of gamma radiation of a radioelement from the known intensity I(Ech2) of gamma radiation of a standard radioelement, characterised in that it includes a step for calculating the intensity I(Ech1) as the following formula, where S(Ech1) is the net area of the gamma radiation of the radioelement, S(Ech2) is the net area of the gamma radiation of the standard radioelement, R1 and R2 are respectively a total absorption efficiency of the radiation detector used for measuring S(Ech1) and of the radiation detector used for measuring S(Ech2), [Delta][rho]1 and [Delta][rho]2 are measurements of reactivity variation of a nuclear reactor measured by the oscillation technique, and relating respectively to the radioelement and the standard radioelement, WA,1 and WA,2 are respectively the neutron importance of the radioelement and the neutron importance of the standard radioelement, and Cd1 and Cd2 arerespectively a radioactive decay correction datum of the sample and a radioactivity decay correction datum of the standard sample.

Description

technical field [0001] The invention relates to a method for determining the gamma (γ) ray emission intensity of radioactive elements. Background technique [0002] The gamma-ray emission intensity of radioactive elements is an important data in several fields of reactor physics. They are used, for example, in non-destructive measurements (gamma spectrometry) or as input data for analog codes used to determine photon heating. [0003] A first method for determining the intensity of the gamma emission emitted by β-decay consists in using high-resolution spectrometry, for example, thanks to a germanium detector, obtained with extremely high precision (1% left and right), combined with relatively less well-controlled β-branch ratio data. Therefore, gamma emission data obtained by this first method often have an uncertainty higher than 10%. This is a practical disadvantage. [0004] A recently known method makes it possible to dispense with the determination of the β-branchi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/16
CPCG21C17/06G21C17/10G21C7/08Y02E30/30
Inventor 皮耶·勒孔特
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap