Verification of gamma spectroscopy programs: a standardized approach

Koskelo, M. J.; Mercier, M.

doi:10.1016/0168-9002(90)90799-c

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…for the PVT with poor energy resolution to identify peak energy were conservatively assumed to be 1.5 full width at half maximum (FWHM), which is usually taken for validation of gamma-ray peak contribution regions [21,22]. Here, the corresponding PVT energy resolution was set as 18.5% at 662 keV based on Mitchell and Brusseau [23], and Gaussian energy broadening model [24] was used to estimate FWHMs at different energy levels.…”

Section: Jrprmentioning

confidence: 99%

Preliminary Study on Rapid Measurement of Gross Alpha/Beta and 90Sr Activities in Surface Soil by Mobile ZnS(Ag)/PTV Array and Handheld PVT Rod with Gated Energy Channels

Lee¹,

Kim²

2021

J Radiat Prot Res

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Background: Surface soil radiation monitoring around nuclear facilities is important to classify and characterize the contaminated areas. A scanning and direct measurement technique can survey the sites rapidly before starting sampling analysis.Materials and Methods: Regarding this, we test and suggest a measurement technique for gross alpha/beta and 90Sr activities in surface soil based on a mobile ZnS(Ag)/PVT (polyvinyltoluene) array and a handheld PVT rod, respectively. To detect 90Sr selectively in soil mixed with naturally occurring radioactive materials, chosen energy channel counts from the multichannel analyzers were used instead of whole channel counts. Soil samples contaminated with exempt liquid 90Sr with 1 Bq· g-1, 3 Bq· g-1, and 10 Bq· g-1 were prepared and hardened by flocculation.Results and Discussion: The mobile ZnS(Ag)/PVT array could discriminate gross alpha, gross beta, and gamma radiation by the different pulse-shaped signal features of each sensor material. If the array is deployed on a vehicle, the scan minimum detectable concentration (MDC) range will be about 0.11–0.17 Bq· g-1 at 18 km· hr-1 speed, highly sensitive to actual sites. The handheld PVT rod with 12 mm (Φ) × 20 mm (H) size can directly measure 90Sr selectively if channels on which energies are from 1,470 and 2,279 keV are gated, minimizing crossdetection of other radionuclides. These methods were verified by measuring soil samples fabricated with homogeneous 90Sr concentrations, showing static MDC of 2.16 Bq· g-1 at a measurement time of 300 seconds.Conclusion: Based on the results, comprehensive procedures using these detectors are suggested to optimize soil sites survey.

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Section: Jrprmentioning

confidence: 99%

Preliminary Study on Rapid Measurement of Gross Alpha/Beta and 90Sr Activities in Surface Soil by Mobile ZnS(Ag)/PTV Array and Handheld PVT Rod with Gated Energy Channels

Lee¹,

Kim²

2021

J Radiat Prot Res

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“…The detection of the peak and determination of the peak position can be realized in successive steps, independent of each other. This algorithm is based on first derivative of peak overlapping pulses, and a MATLAB routine implementing the maximum peak search algorithm [20][21][22].…”

Section: First Derivative and Maximum Peak Search Algorithmmentioning

confidence: 99%

Pileup recovery algorithms for digital gamma ray spectroscopy

2012

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This paper presents algorithms for overcoming a common problem of gamma ray spectroscopy, namely the peak pileup recovery problem. Three different approaches are studied and evaluated within a spectroscopy system. The algorithms are evaluated by the means of parameters error and fitting error calculations. The first approach is a direct search based on Nelder-Mead technique without any derivatives in order to find the local minimum points. A Gaussian shape in conjunction with the peak height and its position of each pulse are used to construct the pulse. So, the main pulse parameters such as peak amplitude, position and width can be determined. The second algorithm is based on the nonlinear least square method. This approach has accuracy of recovering the original pulses with mean square error of 4.7306x10-12. In this paper another technique is tried. This technique which is proposed as third algorithm is based on a maximum peak search method combined with the first derivative method to determine peak position of each pulse. Comparison among these approaches is conducted in terms of parameters errors. The pulse parameters have been calculated and compared with the actual one. The second approach shows the best accuracy, for determining peak height and position, but the width parameter scored the highest error.

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“…The main improvement of different methods used in this field [1,2] brought a replacement of analog measurement systems by digital ones [3][4][5][6][7]. A lot of studies have reported various spectrometric digital systems and processing software development [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Calibration of gamma-ray detectors using Gaussian photopeak fitting in the multichannel spectra with a LabVIEW-based digital system

et al. 2017

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This paper reports on the development of a gamma-ray spectroscopic system for the (i) recording and (ii) processing of spectra. The utilized data read-out unit consists of a PCI digital oscilloscope, personal computer and LabVIEW™ programming environment. A pulse-height spectra of various sources were recorded with two NaI(Tl) detectors and analyzed, demonstrating the proper usage of the detectors. A multichannel analyzer implements the Gaussian photopeak fitting. The presented method provides results which are in compliance to the ones taken from commercial spectroscopy systems. Each individual hardware or software unit can be further utilized in different spectrometric user-systems. An application of the developed system for research and teaching purposes regarding the design of digital spectrometric systems has been successfully tested at the laboratories of the Department of Experimental Physics.

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Verification of gamma spectroscopy programs: a standardized approach

Cited by 15 publications

References 4 publications

Preliminary Study on Rapid Measurement of Gross Alpha/Beta and 90Sr Activities in Surface Soil by Mobile ZnS(Ag)/PTV Array and Handheld PVT Rod with Gated Energy Channels

Preliminary Study on Rapid Measurement of Gross Alpha/Beta and 90Sr Activities in Surface Soil by Mobile ZnS(Ag)/PTV Array and Handheld PVT Rod with Gated Energy Channels

Pileup recovery algorithms for digital gamma ray spectroscopy

Calibration of gamma-ray detectors using Gaussian photopeak fitting in the multichannel spectra with a LabVIEW-based digital system

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