Determination of Gamma-Ray Abundance in Photopeaks with Analytic and Numeric Approaches via CERN’s ROOT Analysis Framework
Abstract
For years in gamma-ray spectrometry, there has been numerious numeric methods implemented and dedicated to integrate the photopeak areas. With the advance of new technology and softwares, determination of peak areas have been digitized. In addition, new statistical approaches have given diverse perspectives in analysing the experimental data. In this case study, Maestro software was used to extract the experimental gamma-ray data from radioactive 60Co source. In general, analysts have been challenged by the calculation of background area under certain gamma-ray peaks when there is especially low counts. For instance, this problem lead them to find different net area values in various accuracies for the same peak. Therefore the precision of determination based on different statistics might affect the results. The systematic error, which is caused by the shapes and models of the background estimation, has been investigated by CERN’s ROOT software. This detailed analysis of digital data from NaI(Tl) scintaillation detector has been tabulated with its comparisons in various modern analytic methods and numeric approaches dated back to 1960s and 1970s.
References
- COVELL,D.F.,_1959_Determination of Gamma-Ray Abundance Directly from the Total Absorption Peak. Analytical Chemistry,31(11):1785-1790.
- HEYDORN,K., LADA,W.,1972. Peak Boundary Selection in Photopeak Integration by the Method of Covell. Analytical Chemistry,44(14):2313-2317. LOSKA,L.,1988. A modification of the “total peak area” (TPA) method for gamma ray spectra. Appl.Radiat.Isot.,39(6):475-477.
- BAEDECKER,P.A..1971.Digital Methods of Photopeak Integration in Activation Analysis. Analytical Chemistry,43(3):405-410.
- STERLINSKI, S.,1968. Analysis of digital data from a multichannel pulse height analyzer on gamma ray total absorption peaks. Analytical Chemistry,40(13):1995-1998.
- GILMORE, G.R.,2008.Practical Gamma Ray Spectrometry. John Wiley & Sons, Ltd,England,387s.
- KOKTA, L. 1973. Determination of peak area. Nuclear Instruments and Methods, 112:245-251.
- BAEDECKER, P.A., GROSSMAN, J.N. 1989. The Computer Analysis of High Resolution Gamma-Ray Spectra from Instrumental Activation Analysis Experiments. Open-File Report:89-454. U.S. Geological Survey. DOI:10.3133/ofr89454.
- A65-B32 Software’s User’s Manual. Ortec Part No. 777800. Available: https://www.ortec-online.com/-/media/ametekortec/manuals/a65-mnl.pdf [Access on: 1th September 2020].
- KENNEDY,G.,1990. Comparison of photopeak integration methods. Nuclear Instruments and Methods in Physics Research A 299: 349-353.
- Spiegel, Murray R.; Stephens, Larry J (2008), Schaum's Outlines Statistics (Fourth ed.), McGraw Hill, ISBN 978-0-07-148584-5
Farklı Analitik ve Nümerik Yöntemlerle Fotopiklerdeki Gama Işını Miktarının CERN’ün ROOT Analiz Programıyla Hesaplanması
Abstract
Yıllardır gama ışını spektroskopisinde, fotopik alanlarının integrasyonu için birçok nümerik yöntem geliştirilmiştir. Yeni gelişen teknoloji ve yazılımlarla, fotopik alanlarının hesaplanması dijital ortama aktarılmıştır. Ek olarak, yeni istatistiksel yöntemlerde deneysel verinin analiz edilmesinde farklı bakış açıları sağlanmıştır. Bu örnek çalışmada, Maestro yazılımı radyoaktif 60Co kaynağından deneysel verinin alınması için kullanılmıştır. Genel olarak, düşük sayım sayısı olan durumlar belirli piklere ait taban sayımı hesaplamalarında analiz yapanların işini zorlaştırmaktadır. Örneğin, bu sorun onların aynı pik için farklı duyarlılıklarda net alan hesaplamalarına yol açmıştır. Bu yüzden, farklı istatistiksel yaklaşımlara bağlı bulunan doğruluk paylarının sonuçlara etkileri olacaktır. Taban sayımının hesabında kullanılan şekiller ve modellerden kaynaklanan sistematik hatalar, CERN tarafından geliştirilen ROOT yazılımı ile araştırılmıştır. NaI(Tl) sintilasyon detektörü ile yapılan bu dijital verinin detaylı analizi, 1960 ve 1970’lere uzanan nümerik metotlar ve modern analitik metotlarla karşılaştırılmalı olarak tablo halinde verilmiştir.
References
- COVELL,D.F.,_1959_Determination of Gamma-Ray Abundance Directly from the Total Absorption Peak. Analytical Chemistry,31(11):1785-1790.
- HEYDORN,K., LADA,W.,1972. Peak Boundary Selection in Photopeak Integration by the Method of Covell. Analytical Chemistry,44(14):2313-2317. LOSKA,L.,1988. A modification of the “total peak area” (TPA) method for gamma ray spectra. Appl.Radiat.Isot.,39(6):475-477.
- BAEDECKER,P.A..1971.Digital Methods of Photopeak Integration in Activation Analysis. Analytical Chemistry,43(3):405-410.
- STERLINSKI, S.,1968. Analysis of digital data from a multichannel pulse height analyzer on gamma ray total absorption peaks. Analytical Chemistry,40(13):1995-1998.
- GILMORE, G.R.,2008.Practical Gamma Ray Spectrometry. John Wiley & Sons, Ltd,England,387s.
- KOKTA, L. 1973. Determination of peak area. Nuclear Instruments and Methods, 112:245-251.
- BAEDECKER, P.A., GROSSMAN, J.N. 1989. The Computer Analysis of High Resolution Gamma-Ray Spectra from Instrumental Activation Analysis Experiments. Open-File Report:89-454. U.S. Geological Survey. DOI:10.3133/ofr89454.
- A65-B32 Software’s User’s Manual. Ortec Part No. 777800. Available: https://www.ortec-online.com/-/media/ametekortec/manuals/a65-mnl.pdf [Access on: 1th September 2020].
- KENNEDY,G.,1990. Comparison of photopeak integration methods. Nuclear Instruments and Methods in Physics Research A 299: 349-353.
- Spiegel, Murray R.; Stephens, Larry J (2008), Schaum's Outlines Statistics (Fourth ed.), McGraw Hill, ISBN 978-0-07-148584-5
Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Articles |
| Authors | |
| Early Pub Date | April 11, 2022 |
| Publication Date | May 31, 2022 |
| Published in Issue | Year 2022 Issue: 36 |
