Abstract
Alpha spectrometry is an extremely useful and sensitive for detection of alpha-emitting nuclides. Contamination of the silicon detectors for low-level alpha spectrometry by recoil nuclides is a serious problem in the measurement of alpha emitters decaying to daughter nuclides with short half-lives. This unwanted contamination leads to decreased measurement sensitivity causing a degradation of the limit of detection. The simplest method to prevent this radioactive contamination of detector is to use a catcher film between the alpha source and the detector. In this work we describe the obtaining of the thin formvar films as stopper foils for recoil nuclei and we investigated the influence of these films on alpha spectrometry parameters, as energy shift (~30 keV) and resolution (~7%). No significant deterioration of the alpha spectrometry parameters was observed when using thin formvar films. Using the ASTAR web databases, which calculate stopping powers for alpha particles, the thickness of formvar films was estimated to be about 5.355 × 10−5 g/cm2. The measurements were performed with an ORTEC SOLOIST alpha spectrometer with PIPS detector.
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References
Garcia -Torano E (2006) Current status of alpha-particle spectrometry. Appl Radiat Isot 64:1273–1280
Vainblat N, Pelled O, German U, Haquin G, Tshuva A, Alfassi ZB (2004) Determination of parameters relevant to alpha spectrometry when employing source coating. Appl Radiat Isot 61:307–311
Inn KGW, Hall E, Woodward JTIV, Stewart B, Pollanen R, Selvig L, Turner S, Outola I, Nour S, Kurosaki H, LaRosa J, Schultz M, Lin Z, Yu Z, McMahon C (2008) Use of thin collodion films to prevent recoil-ion contamination of alpha-spectrometry detectors. J Radioanal Nucl Chem 276(2):385–390
Van der Wijk A (1987) Radiometric dating by alpha spectrometry on uranium series nuclides. Rijksuniversiteit Groningen, Holland
Van der Wijk A et al (1987) The use of thin film plastic foils in low-level alpha spectrometry. Int J Radiat Appl Instrum A A38:1061–1065
Martin P, Hancock GJ (2004) Peak resolution and tailing in alpha-particle spectrometry for environmental samples. Appl Radiat Isot 61:161–165
Cosma C, Ristoiu D, Poffijn A, Meesen G (1997) Radon in various environmental samples in the Herculane Spa, Cerna Valley, Romania. Environ Int 22:383–388
Dreve S, Cuna S, Cosma C (2008) Soil and sediment sample analysis using alpha spectrometry. In: Cosma C, Varvara S, Gligor M (eds) Environment radioactivity: absolute ages by nuclear dating methods. Ed. Quantum, ISBN: 978-973-88835-0-5, 195-201
Berger MJ, Coursey JS, Zucker MA, Chang J (2005) ESTAR, PSTAR, and ASTAR: computer programs for calculating stopping-power and range tables for electrons, protons, and helium ions (version 1.2.3). [Online] Available: http://physics.nist.gov/Star, 13 Nov. 2010. National Institute of Standards and Technology, Gaithersburg, MD
Acknowledgments
This paper was realized with the support of EURODOC “Doctoral Scholarships for research performance at European level” project, financed by the European Social Fund and Romanian Government also by PN II grant No. 32149/2008.
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Rusu, O.A., Dreve, S., Begy, R.C. et al. Characteristics of formvar films used to prevent alpha-detector contamination. J Radioanal Nucl Chem 290, 241–245 (2011). https://doi.org/10.1007/s10967-011-1256-y
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DOI: https://doi.org/10.1007/s10967-011-1256-y