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	Relationship between soil bulk density and PVR of in situ gamma spectra
	Feng, T. C. ; Cheng, J. P. ; Jia, M. Y. ; Wu, R. ; Feng, Y. J. ; Su, C. Y. ; Chen, W.
	2010-10-12 ; 2010-10-12
关键词	In situ gamma spectra Natural radionuclide Peak-to-valley ratio (PVR) Soil bulk density SALT-MARSH ENVIRONMENTS DEPTH DISTRIBUTIONS RAY SPECTROMETRY RADIONUCLIDES Instruments & Instrumentation Nuclear Science & Technology Physics, Particles & Fields Spectroscopy
中文摘要	This paper presents the specific relationship between soil bulk density and peak-to-valley ratio (PVR) of natural radionuclides in in situ gamma spectra, by theoretical deduction, Monte Carlo simulation and experimental research. Results show that for an infinite half-space volume source, PVR is a constant independent of the diverse soil bulk density. But for a limited-scale volume source, PVR would decrease slowly with an increase in soil bulk density, and the smaller the source scale, the larger the PVR variation with soil bulk density. However, the PVR variation with bulk density is very small in general. For field measurements, the volume source thickness is uncontrollable in practice, and the volume source radius should not be as small as needed for the limitation of low detection efficiency. Hence the soil bulk density could not be determined through the information from PVR of field in situ gamma spectra. (c) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78854]
专题	清华大学
推荐引用方式 GB/T 7714	Feng, T. C.,Cheng, J. P.,Jia, M. Y.,et al. Relationship between soil bulk density and PVR of in situ gamma spectra[J],2010, 2010.
APA	Feng, T. C..,Cheng, J. P..,Jia, M. Y..,Wu, R..,Feng, Y. J..,...&Chen, W..(2010).Relationship between soil bulk density and PVR of in situ gamma spectra..
MLA	Feng, T. C.,et al."Relationship between soil bulk density and PVR of in situ gamma spectra".(2010).

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