Abstract
Yıllar boyunca, sayım koşullarının ve taban sayımı bölgesi genişliğinin optimizasyonunun belirlenmesi gama spektroskopisinde birçok yöntem vasıtasıyla araştırılmıştır. Fotopik analizindeki dijital entegrasyon yöntemleri içinde, taban sayımı bölgesinin genişliğinin çeşitli etkileri halen odak noktası olmayı sürdürmektedir. Bu araştırmanın nükleer fizikteki uygulama aracı, çoğunlukla gama ışını algılamada kullanılan NaI(Tl) ve HPGe detektörleri gibi düşük veya yüksek çözünürlüklü detektörlerle algılanan radyoaktif kaynaklar olmuştur. Çözünürlükten kaynaklanan bu faktör, spekktrumlarda çok iç içe bulunan piklerin ayırt edilmesine etki etmektedir. Bu yüzden, gama spektroskopisinde, her bir kanaldaki sayım sayısından gelebilecek hata paylarını azaltmak için bilgisayar ve istatistiksel tabanlı yeni yöntemler uygulanmalıdır. Bu noktada, her bir pik için farklı bin (kanal) bölgesi genişlikleri kullanılıp test edilerek daha iyi netlikte sonuçlar elde edilebilir. Bu çalışmada spesifik olarak NaI(Tl) sintilasyon detektörü kullanılarak, Gilmore’un Toplam Pik Alanı (TPA) metoduyla farklı taban sayımı bölgesi genişliklerinin sayım sayısı ölçüm duyarlılığı ölçülüp analiz edilecektir.
References
- Pritychenko, B. (17.04.2022). NNDC, Brookhaven National Laboratory. https://www.nndc.bnl.gov/nudat3/NuDatBandPlotServlet?nucleus=137Ba&unc=nds.
- GILMORE, G.R.,2008.Practical Gamma Ray Spectrometry. John Wiley & Sons, Ltd,England,387s.
- 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.
- 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.
Case Study of 137Cs: Optimizing Counting Conditions with Different Background Region Width Selection
Abstract
Throughout the years, an optimizing counting conditions and optimum background region width determination has been carried out by several methods in gamma-ray spectroscopy. The effect of various background region widths has been the focus on digital integration methods in photopeak analysis. As an application tool of this in nuclear physics, radioactive sources has been mostly used by the lower or the higher resolution detectors; such as NaI(Tl) or HPGe gamma-ray detectors. This resolution factor influences the distinguishability of the peaks in close proximity in spectra. Therefore, a new computational and statistical approach should be implemented to decrease the error factors contributed by one of each bin content, namely the counts, in gamma-ray spectra. At this point, greater precision might be needed and reached in testing different bin region widths on each side of the range of interest for an individual peak. In specific, Gilmore's Total Peak Area (TPA) method will be used here to measure and anaylze the background region width comparisons and their effects in the precision of counting gamma-rays by a NaI(Tl) scintiallation detector.
Keywords
Gamma-ray spectroscopy photopeak digital integration methods TPA method background counting
References
- Pritychenko, B. (17.04.2022). NNDC, Brookhaven National Laboratory. https://www.nndc.bnl.gov/nudat3/NuDatBandPlotServlet?nucleus=137Ba&unc=nds.
- GILMORE, G.R.,2008.Practical Gamma Ray Spectrometry. John Wiley & Sons, Ltd,England,387s.
- 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.
- 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.
Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Articles |
| Authors | |
| Publication Date | May 31, 2022 |
| Published in Issue | Year 2022 |