Alpha Spectrometry

Vajda, N.

doi:10.1016/b978-0-12-384873-4.00006-2

Cited by 14 publications

(6 citation statements)

References 205 publications

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“…Calculation of sample activity does not require a knowledge of counting efficiency ε , while for the calculation of chemical recoveries R this value is needed. Many laboratories determine chemical recoveries because it is a suitable tool for checking the quality of performed analyses [ 8 ]. The counting efficiency depends not only on the sample—detector distance, but also the diameter of the source on which alpha emitting isotopes are deposited.…”

Section: Resultsmentioning

confidence: 99%

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Determination of 238Pu, 239+240Pu and 241Am in air filters

Rzemek

Czerwiński

Ośko

et al. 2016

J Radioanal Nucl Chem

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The aim of this work is to present the method for sequential plutonium and americium activity determination in air filters using chromatographic radionuclide separation and alpha spectrometry measurement. The developed method may be employed for the purposes of workplace monitoring and as an indicator of the need of introducing the individual monitoring as well as a useful complementation of individual monitoring. Basic parameters describing the developed method such as values of chemical recoveries and minimum detectable activities for plutonium and americium isotopes have been determined. Applied counting efficiency was obtained using Monte Carlo calculation method.

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Section: Resultsmentioning

confidence: 99%

“…Efficiency calculations were usually performed using the Monte Carlo code MCNP [ 8 ]. In this case Monte Carlo simulation was also applied.…”

Section: Resultsmentioning

confidence: 99%

Determination of 238Pu, 239+240Pu and 241Am in air filters

Rzemek

Czerwiński

Ośko

et al. 2016

J Radioanal Nucl Chem

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“…The sample was measured in both techniques under similar conditions discussed below. The parameters characterizing the stability of the system are the peak location, the FWHM, and the counting efficiency of a selected radionuclide present in the standard source [24].…”

Section: Quality Control For 𝛼 −Spectrometersmentioning

confidence: 99%

“…The performance of the RAD-7 instrument was verified by counting the sample from the same source in the LSC [24]. The same standard sample containing at least two 𝛼 −emitting radionuclides, which are 218 Po and 214 Po, was used to check their energies, the Full Width Half Maximum (FWHM) and the efficiency calibration of the detector or 𝛼 −spectrometer [24]. The sample was measured in both techniques under similar conditions discussed below.…”

Section: Quality Control For 𝛼 −Spectrometersmentioning

confidence: 99%

Meteorological effects on the performance of a solid-state α ― detector measuring water samples with predefined radon concentration

Masevhe,

Mavunda,

Connell

2023

Preprint

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The current study validates an α-spectrometry method by assessing the functionality and response of a solid-state alpha detector to known Radon concentrations, outdoor weather conditions and varied sample volumes. These all have an influence on the sample’s behaviour inside the detector. Five samples of water with known radon concentrations (ranged from 90.66±7.20 mBq.l−1 to 314.65±24.6 mBq.l− 1) were used. The experimental setup used a radon-stripping unit connected to a continuous radon monitor, which measured the 222Rn in the water by counting α-particles emitted by its progeny in secular equilibrium. The effects of meteorological parameters such as the sample concentrations and volume, internal temperature and relative humidity inside the detector were observed. The analysis of the fluctuations of temperature and relative humidity in the detection chamber were found to be in agreement with theoretical predictions and outcomes of other previous studies. To calibrate the detector of choice, the same standard samples were measured by a liquid scintillation counter (LSC) which was considered as a reference detector in the current study. The two techniques gave similar trends in the results. The LSC results appeared to be consistently lower than those of the α-spectrometry as seen by the RAD-7 device. The α-spectrometry system based on a solid-state detector had a good resolution of the peaks (FWHM of 18.61 keV and 20.93 keV) which was better than that of LSC (FWHM 166 keV) whose peaks could not be resolved. The energy-tailing of the LCS spectrum caused by Compton Scattering led to a higher count-rate of 4.11 cpm for the LSC compared to 0.71 cpm for the RAD-7. The study demonstrated that α-spectrometry method as deployed in the RAD-7 device is the most suitable equipment for the measurement of radon concentration in water because of its superior sensitivity.

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“…A number of reviews have been published at various times by researchers about source preparation, de-convolution algorithms, and applications of a-spectrometry. [9][10][11][12][13][14][15][16] However, there is no review available that deals with all these topics. The present review is written with the objective to summarize the role of AS in nuclear, environmental and biological sciences.…”

Section: Introductionmentioning

confidence: 99%