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Absorption of Nuclear Radiation 165

at 1.5 m from the source assuming only exponential absorption? (b) What is the relaxation length? (c) What is the
build-up factor?

6.11. Literature

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R. L. M6SSBAUER, Recoilless nuclear resonance absorption, Ann. Rev. Nucl. Sci. 12 (1962) 1.
I. C. ROCKLEY, An Introduction to Industrial Radiology, Butterworths, London, 1964.
C. S. FADLEY, S. B. M. HAGSTROM, J. M. HOLLANDER, M. P. KLEIN, and D. A. SHIRLEY, Chemical bonding
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D. A. SHIm.EY, Chemical tools from nuclear physics, Science 161 (1968) 745.
IAEA, Nuclear Well Logging in Hydrology, Tech. Report 126, Vienna, 1971.
IAEA, Commercial Portable Gauges .for Radiometric Determination of the Density and Moisture Content of
Building Materials, Tech. Report 130, Vienna, 1971.
G. M. BANCROFT, MiJssbauer Spectroscopy, J. Wiley, 1973.
I. A. COOPER, Comparison of particle and photon excited X-ray fluorescence applied to trace element
measurements on environmental samples, Nucl. Instr. Methods 106 (1973) 525.
H. W. THUMMEL, Stand und Entwicklungstendenzen auf dem Gebiet der Isotopen und Strahlenanalytik.
Physikalische Analysenverfahren mit Radionukliden, Isotopenpraxis 11 (1975) 1, 41, 87, 117, 172.
C. H. WANG, D. H. WILLIS, and W. D. LOVELAND, Radiotracer Methodology in the Biological, Environmental
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W. D. EHMANN, and D. E. VANCE, Radiochemistry and Nuclear Methods of Analysis, Wiley Interscience, 1991.
G. FURLAN, P. CASSOLA GUIDA, and C. TuNIZ (Ed.), New Paths in the Use of Nuclear Techniques for Art and
Archeology, World Scientific Pub., Singapore, 1986.
M. I. RYCROFT (ed.), The Cambridge Encyclopedia of Space, Cambridge University Press, 1990