Monte carlo simulation of in situ gamma-spectra recorded by NaI (Tl) detector in the marine environment

doi:10.1007/s11802-015-2841-4

	Monte carlo simulation of in situ gamma-spectra recorded by NaI (Tl) detector in the marine environment
	Wang Yiming 1; Zhang Yingying 2; Wu Ning 2; Wu Bingwei 2; Liu Yan 2; Cao Xuan 2; Wang Qian 2
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2015-06
卷号	14 期号:3 页码:471-474
关键词	Monte Carlo simulation marine radioactivity monitoring NaI (Tl) detector response spectra background spectra
ISSN号	1672-5182
DOI	10.1007/s11802-015-2841-4
英文摘要	To develop a NaI (Tl) detector for in situ radioactivity monitoring in the marine environment and enhance the confidence of the probability of the gamma-spectrum analysis, Monte Carlo simulations using the Monte Carlo N-Particle ( MNCP ) code were performed to provide the response spectra of some interested radionuclides and the background spectra originating from the natural radionuclides in seawater recorded by a NaI (Tl) detector. A newly developed 75 mm x 75 mm NaI (Tl) detector was calibrated using four reference radioactive sources Cs-137, Co-60, K-40 and Mn-54 in the laboratory before the field measurements in seawater. A simulation model was established for the detector immersed in seawater. The simulated spectra were all broadened with Gaussian pulses to reflect the statistical fluctuations and electrical noise in the real measurement. The simulated spectra show that the single-energy photons into the detector are mostly scattering low-energy photons and the high background in the low energy region mainly originates from the Compton effect of the high energy ?-rays of natural radionuclides in seawater. The simulated background spectrum was compared with the experimental one recorded in field measurement and they seem to be in good agreement. The simulation method and spectra can be used for the accurate analysis of the filed measurement results of low concentration radioactivity in seawater.
资助项目	Qingdao Applied Basic Research Project[14-2-4-94-jch]
WOS关键词	SCINTILLATION DETECTORS ; SEA-WATER ; EFFICIENCY ; RADIOACTIVITY ; POINT
WOS研究方向	Oceanography
语种	英语
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000354403700010
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26027]
专题	自然资源部第一海洋研究所
通讯作者	Zhang Yingying
作者单位	1.SOA, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.Shandong Acad Sci, Shandong Prov Key Lab Ocean Environm Monitoring T, Inst Oceanog Instrumentat, Qingdao 266001, Peoples R China
推荐引用方式 GB/T 7714	Wang Yiming,Zhang Yingying,Wu Ning,et al. Monte carlo simulation of in situ gamma-spectra recorded by NaI (Tl) detector in the marine environment[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2015,14(3):471-474.
APA	Wang Yiming.,Zhang Yingying.,Wu Ning.,Wu Bingwei.,Liu Yan.,...&Wang Qian.(2015).Monte carlo simulation of in situ gamma-spectra recorded by NaI (Tl) detector in the marine environment.JOURNAL OF OCEAN UNIVERSITY OF CHINA,14(3),471-474.
MLA	Wang Yiming,et al."Monte carlo simulation of in situ gamma-spectra recorded by NaI (Tl) detector in the marine environment".JOURNAL OF OCEAN UNIVERSITY OF CHINA 14.3(2015):471-474.