Study on element detection and its correction in iron ore concentrate based on a prompt gamma-neutron activation analysis system
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摘要
A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlorine in the neutron field, the linear relationship between the iron analytical coefficient and total iron content was poor, increasing the error in the quantitative analysis. To solve this problem, gamma-ray self-absorption compensation and a neutron field correction algorithm were proposed, and the experimental results have been corrected using this algorithm. The results show that the linear relationship between the iron analytical coefficient and total iron content was considerably improved after the correction. The linear correlation coefficients reached 0.99 or more.
A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlorine in the neutron field, the linear relationship between the iron analytical coefficient and total iron content was poor, increasing the error in the quantitative analysis. To solve this problem, gamma-ray self-absorption compensation and a neutron field correction algorithm were proposed, and the experimental results have been corrected using this algorithm. The results show that the linear relationship between the iron analytical coefficient and total iron content was considerably improved after the correction. The linear correlation coefficients reached 0.99 or more.
A prompt gamma-neutron activation analysis(PGNAA) system was developed to detect the iron content of iron ore concentrate. Because of the self-absorption effect of gamma-rays and neutrons, and the interference of chlorine in the neutron field, the linear relationship between the iron analytical coefficient and total iron content was poor, increasing the error in the quantitative analysis. To solve this problem, gamma-ray self-absorption compensation and a neutron field correction algorithm were proposed, and the experimental results have been corrected using this algorithm. The results show that the linear relationship between the iron analytical coefficient and total iron content was considerably improved after the correction. The linear correlation coefficients reached 0.99 or more.
引文
1.F.Y.Shi,J.Y.Ma,J.W.Zhao et al.,Detection sensitivities of Cand O in coal due to a channel in the moderator.Radiat.Meas.46,88-91(2011).https://doi.org/10.1016/j.radmeas.2010.08.025
2.A.A.Naqvi,A Monte Carlo comparison of PGNAA system performance using252Cf neutrons,2.8-MeV neutrons and14-MeV neutrons.Nucl.Instrum.Methods A 511,400-407(2003).https://doi.org/10.1016/s0168-9002(03)01949-1
3.A.Favalli,H.C.Mehner,V.Ciriello et al.,Investigation of PGNAA using the LaBr 3 scintillation detector.Appl.Radiat.Isot.68,901-904(2010).https://doi.org/10.1016/j.apradiso.2009.09.058
4.C.Oliveira,J.Salgado,F.Leitao,Density and water content corrections in the gamma count rate of a PGNAA system for cement raw material analysis using the MCNP Code.Appl.Radiat.Isot.49,923-930(1998).https://doi.org/10.1016/s0969-8043(97)10111-7
5.A.X.da Silva,V.R.Crispim,Moderator-collimator-shielding design for neutron radiography systems using252Cf.Appl.Radiat.Isot.54,217-225(2001).https://doi.org/10.1016/s0969-8043(00)00291-8
6.C.Oliveira,J.Salgado,I.F.Goncalves et al.,A Monte Carlo study of the influence of the geometry arrangements and structural materials on a PGNAA system performance for cement raw material analysis.Appl.Radiat.Isot.48,1349-1354(1997).https://doi.org/10.1016/s0969-8043(97)00130-9
7.J.B.Yang,X.G.Tuo,Z.Li et al.,Mc simulation of a PGNAAsystem for on-line cement analysis.Nucl.Sci.Tech.21,221-226(2010).https://doi.org/10.13538/j.1001-8042/nst.21.221-226
8.A.A.Naqvi,M.M.Nagadi,Performance comparison of an241Am-Be neutron source-based PGNAA setup with the KFUPMPGNAA setup.J.Radioanal.Nucl.Chem.260,641-646(2004).https://doi.org/10.1023/b:jrnc.0000028225.07280.74
9.F.Zhang,J.T.Liu,Monte Carlo simulation of PGNAAsystem for determining element content in the rock sample.J.Radioanal.Nucl.Chem.299,1219-1224(2014).https://doi.org/10.1007/s10967-013-2858-3
10.L.Z.Zhang,B.F.Ni,W.Z.Tian et al.,Status and development of prompt c-ray neutron activation analysis.Atom.Energy Sci.Technol.39,282-288(2005).https://doi.org/10.3969/j.issn.1000-6931.2005.03.022.(in Chinese)
11.W.Zhang,L.Zhao,Y.F.Li,Neutron activation analyzer radiological monitoring system.Mod.Min.8,188-189(2017).https://doi.org/10.3969/j.issn.1674-6082.2017.08.059
12.C.S.Lim,J.R.Tickner,B.D.Sowerby et al.,An on-belt elemental analyser for the cement industry.Appl.Radiat.Isot.54,11-19(2001).https://doi.org/10.1016/S0969-8043(00)00180-9
13.Q.F.Song,Y.L.Gong,W.Zhang et al.,Feasibility study for online analysis of bauxite using a PGNAA system.China Min.Mag.10,171-174(2015).https://doi.org/10.3969/j.issn.1004-4051.2015.10.037.(in Chinese)
14.B.R.Wang,G.H.Yin,Z.P.Yang,Identification system for chemical warfare agents with PGNAA method.Nucl.Electron.Detect.Technol.27,621-623(2007).https://doi.org/10.3969/j.issn.0258-0934.2007.04.002.(in Chinese)
15.Y.L.Gong,W.Zhang,J.T.Tao,et al.CN 201348615Y,Adjustable multi element analyzer,2008
16.C.Cheng,W.B.Jia,D.Q.Hei et al.,Study of influence of neutron field and c-ray self-absorption on PGNAA measurement.Atom.Energy Sci.Technol.48,802-806(2014).https://doi.org/10.7538/yzk.2014.48.s0.0802.(in Chinese)
17.M.E.Medhat,Gamma-ray attenuation coefficients of some building materials available in Egypt.Ann.Nucl.Energy 36,849-852(2009).https://doi.org/10.1016/j.anucene.2009.02.006
18.L.T.Yang,C.F.Chen,X.X.Jin et al.,Research on accurate calculation method of c-ray self-absorption correction factor.Atom.Energy Sci.Technol.51,323-329(2017).https://doi.org/10.7538/yzk.2017.51.02.0323.(in Chinese)
19.Reedy and Frankle,At.Data Nucl.Data Tables 80,1,2002.https://www-nds.iaea.org/pgaa.Accessed 9 Mar 2019
20.W.B.Jia,C.Cheng,Q.Shan et al.,Study on the elements detection and its correction in aqueous solution.Nucl.Instrum.Methods B 342,240-243(2015).https://doi.org/10.1016/j.nimb.2014.10.010
21.K.Sudarshan,R.Tripathi et al.,A simple method for correcting the neutron self-shielding effect of matrix and improving the analytical response in prompt gamma-ray neutron activation analysis.Anal.Chim.Acta 549,205-211(2005).https://doi.org/10.1016/j.aca.2005.06.021
22.Z.H.Wu,H.Q.Qi,N.X.Shen et al.,Experimental Method of Nuclear Physics(Atomic Energy Press,Beijing,1997),pp.65-66.(in Chinese)
2.A.A.Naqvi,A Monte Carlo comparison of PGNAA system performance using252Cf neutrons,2.8-MeV neutrons and14-MeV neutrons.Nucl.Instrum.Methods A 511,400-407(2003).https://doi.org/10.1016/s0168-9002(03)01949-1
3.A.Favalli,H.C.Mehner,V.Ciriello et al.,Investigation of PGNAA using the LaBr 3 scintillation detector.Appl.Radiat.Isot.68,901-904(2010).https://doi.org/10.1016/j.apradiso.2009.09.058
4.C.Oliveira,J.Salgado,F.Leitao,Density and water content corrections in the gamma count rate of a PGNAA system for cement raw material analysis using the MCNP Code.Appl.Radiat.Isot.49,923-930(1998).https://doi.org/10.1016/s0969-8043(97)10111-7
5.A.X.da Silva,V.R.Crispim,Moderator-collimator-shielding design for neutron radiography systems using252Cf.Appl.Radiat.Isot.54,217-225(2001).https://doi.org/10.1016/s0969-8043(00)00291-8
6.C.Oliveira,J.Salgado,I.F.Goncalves et al.,A Monte Carlo study of the influence of the geometry arrangements and structural materials on a PGNAA system performance for cement raw material analysis.Appl.Radiat.Isot.48,1349-1354(1997).https://doi.org/10.1016/s0969-8043(97)00130-9
7.J.B.Yang,X.G.Tuo,Z.Li et al.,Mc simulation of a PGNAAsystem for on-line cement analysis.Nucl.Sci.Tech.21,221-226(2010).https://doi.org/10.13538/j.1001-8042/nst.21.221-226
8.A.A.Naqvi,M.M.Nagadi,Performance comparison of an241Am-Be neutron source-based PGNAA setup with the KFUPMPGNAA setup.J.Radioanal.Nucl.Chem.260,641-646(2004).https://doi.org/10.1023/b:jrnc.0000028225.07280.74
9.F.Zhang,J.T.Liu,Monte Carlo simulation of PGNAAsystem for determining element content in the rock sample.J.Radioanal.Nucl.Chem.299,1219-1224(2014).https://doi.org/10.1007/s10967-013-2858-3
10.L.Z.Zhang,B.F.Ni,W.Z.Tian et al.,Status and development of prompt c-ray neutron activation analysis.Atom.Energy Sci.Technol.39,282-288(2005).https://doi.org/10.3969/j.issn.1000-6931.2005.03.022.(in Chinese)
11.W.Zhang,L.Zhao,Y.F.Li,Neutron activation analyzer radiological monitoring system.Mod.Min.8,188-189(2017).https://doi.org/10.3969/j.issn.1674-6082.2017.08.059
12.C.S.Lim,J.R.Tickner,B.D.Sowerby et al.,An on-belt elemental analyser for the cement industry.Appl.Radiat.Isot.54,11-19(2001).https://doi.org/10.1016/S0969-8043(00)00180-9
13.Q.F.Song,Y.L.Gong,W.Zhang et al.,Feasibility study for online analysis of bauxite using a PGNAA system.China Min.Mag.10,171-174(2015).https://doi.org/10.3969/j.issn.1004-4051.2015.10.037.(in Chinese)
14.B.R.Wang,G.H.Yin,Z.P.Yang,Identification system for chemical warfare agents with PGNAA method.Nucl.Electron.Detect.Technol.27,621-623(2007).https://doi.org/10.3969/j.issn.0258-0934.2007.04.002.(in Chinese)
15.Y.L.Gong,W.Zhang,J.T.Tao,et al.CN 201348615Y,Adjustable multi element analyzer,2008
16.C.Cheng,W.B.Jia,D.Q.Hei et al.,Study of influence of neutron field and c-ray self-absorption on PGNAA measurement.Atom.Energy Sci.Technol.48,802-806(2014).https://doi.org/10.7538/yzk.2014.48.s0.0802.(in Chinese)
17.M.E.Medhat,Gamma-ray attenuation coefficients of some building materials available in Egypt.Ann.Nucl.Energy 36,849-852(2009).https://doi.org/10.1016/j.anucene.2009.02.006
18.L.T.Yang,C.F.Chen,X.X.Jin et al.,Research on accurate calculation method of c-ray self-absorption correction factor.Atom.Energy Sci.Technol.51,323-329(2017).https://doi.org/10.7538/yzk.2017.51.02.0323.(in Chinese)
19.Reedy and Frankle,At.Data Nucl.Data Tables 80,1,2002.https://www-nds.iaea.org/pgaa.Accessed 9 Mar 2019
20.W.B.Jia,C.Cheng,Q.Shan et al.,Study on the elements detection and its correction in aqueous solution.Nucl.Instrum.Methods B 342,240-243(2015).https://doi.org/10.1016/j.nimb.2014.10.010
21.K.Sudarshan,R.Tripathi et al.,A simple method for correcting the neutron self-shielding effect of matrix and improving the analytical response in prompt gamma-ray neutron activation analysis.Anal.Chim.Acta 549,205-211(2005).https://doi.org/10.1016/j.aca.2005.06.021
22.Z.H.Wu,H.Q.Qi,N.X.Shen et al.,Experimental Method of Nuclear Physics(Atomic Energy Press,Beijing,1997),pp.65-66.(in Chinese)