Quality of high count rate high resolution short-time activation analysis
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The fast transfer system was modified to enable a fixed counting geometry with high reproductibility using an endcap geometry. The optimal count rate for short time activation analysis by means of the loss free counting system was found to be within 100–140 kcts/s, if a high accuracy is needed (1%). The method of calculating the peak area after the dead time and pile up corrections was modified by changing the peak fitting parameters gradually with increasing count rates. Epithermal activation by a6LiD converter was found to be an ideal irradiation technique for short time activation analysis especially for heavy elements due to the lower contribution of24Na and28Al (up to 30 fold).
KeywordsCount Rate Dead Time Heavy Element Irradiation Technique Counting System
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- 1.G.P. Westphal,Nucl. Instrum. Methods, 136 (1976) 271.Google Scholar
- 2.F. Grass, G.P. Westphal, T. Kasa,Nucl. Geophys., 1–3 (1987) 253.Google Scholar
- 3.A. Salahi, F. Grass, T. Kasa, E. Seidel, S. Roth,J. Trace Microprobe Techn., 6 (1988) 229.Google Scholar
- 4.D.A. Becker, R.M. Lindstrom, J.K. Langland, R.R. Greenberg,J. Trace Microprobe Techn., 14 (1996) 1.Google Scholar
- 5.G.P. Westphal,J. Trace Microprobe Techn., 14 (1996) 57.Google Scholar
- 6.F. Grass, H. Holzner, A. Ritschel, S.S. Ismail, J. Dorner,J. Radioanal. Nucl. Chem. Articles, 179 (1994) 13.Google Scholar
- 7.B. Lipp, Diplomarbeit, Technical Univ. Vienna, 1990.Google Scholar
- 8.Nuclear Data Software ASAP, Version 01, 1988.Google Scholar
- 9.R. Gwozdz, 3rd Intern. Workshop on Short Time Analysis, High Rate Gamma Spectroscopy and X-Ray Techniques, 3–7 Vienna, April 1995.Google Scholar
- 10.IAEA, Nuclear Analysis Software (GANAAS), 1991.Google Scholar