Methods for obtaining characteristic γ-ray net peak count from interlaced overlap peak in HPGe γ-ray spectrometer system
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摘要
For a characteristic c-ray with interlaced overlap peak, and the case where its reliable and credible net count cannot be obtained using the current high-purity germanium(HPGe) multichannel γ-ray spectrum software, two new methods are proposed herein to obtain the γ-ray net peak count from the interlaced overlap peak in the HPGe cray spectrometer system, of which one is the symmetric conversion method based on Gaussian distribution and the other is where the energy average value of two close γ-rays is regarded as the γ-ray energy. The experimental results indicate that the two methods mentioned above are reliable and credible. This study is significant for the development of better γ-ray spectrum processing software for measuring complex γ-ray spectra concerning the nuclear reaction cross section, neutron activation analysis, and analysis of transuranium elements, using an HPGe detector.
For a characteristic c-ray with interlaced overlap peak, and the case where its reliable and credible net count cannot be obtained using the current high-purity germanium(HPGe) multichannel γ-ray spectrum software, two new methods are proposed herein to obtain the γ-ray net peak count from the interlaced overlap peak in the HPGe cray spectrometer system, of which one is the symmetric conversion method based on Gaussian distribution and the other is where the energy average value of two close γ-rays is regarded as the γ-ray energy. The experimental results indicate that the two methods mentioned above are reliable and credible. This study is significant for the development of better γ-ray spectrum processing software for measuring complex γ-ray spectra concerning the nuclear reaction cross section, neutron activation analysis, and analysis of transuranium elements, using an HPGe detector.
For a characteristic c-ray with interlaced overlap peak, and the case where its reliable and credible net count cannot be obtained using the current high-purity germanium(HPGe) multichannel γ-ray spectrum software, two new methods are proposed herein to obtain the γ-ray net peak count from the interlaced overlap peak in the HPGe cray spectrometer system, of which one is the symmetric conversion method based on Gaussian distribution and the other is where the energy average value of two close γ-rays is regarded as the γ-ray energy. The experimental results indicate that the two methods mentioned above are reliable and credible. This study is significant for the development of better γ-ray spectrum processing software for measuring complex γ-ray spectra concerning the nuclear reaction cross section, neutron activation analysis, and analysis of transuranium elements, using an HPGe detector.
引文
1.E.J.Bai,Z.P.Zheng,D.X.Gao et al.,Extensive application and independent research progress of HPGe detector.Nucl.Phys.Rev.33,52-56(2016).https://doi.org/10.11804/NuclPhysRev.33.01.052
2.J.Zhong,X.G.Wu,Y.J.Ma et al.,A development of lifetime measurement based on the differential decay curve method.Nucl.Sci.Tech.29,108-1-7(2018).https://doi.org/10.1007/s41365-018-0453-6
3.C.Y.Xiong,M.Z.Liu,Z.Zuo et al.,Ballistic deficit compensation method for a large-volume HPGe detector at high count rates.Nucl.Sci.Tech.27,67-1-9(2016).https://doi.org/10.1007/s41365-016-0063-0
4.X.M.Zhou,G.M.Liu,D.Li et al.,Using activation method to measure neutron spectrum in an irradiation chamber of a research reactor.Nucl.Sci.Tech.25,010603-1-5(2014).https://doi.org/10.13538/j.1001-8042/nst.25.010603
5.S.U.Rehman,S.M.Mirza,N.M.Mirza et al.,GEANT4 simulation of photo-peak efficiency of small high purity germanium detectors for nuclear power plant applications.Ann.Nucl.Energy38,112-117(2011).https://doi.org/10.1016/j.anucene.2010.08.010
6.W.X.Yu,X.L.Huang,X.J.Chen et al.,Evaluation of the relative c-ray intensities emitted from56Co and66Ga.Nucl.Sci.Tech.20,363-368(2009).https://doi.org/10.13538/j.1001-8042/nst.20.363-368
7.M.A.Mariscotti,A method for automatic identification for peaks in the presence of background and its application to spectrum analysis.Nucl.Instrum.Methods 50,309-320(1967).https://doi.org/10.1016/0029-554x(67)90058-4
8.V.E.Levis,K.J.Zieba,A transfer standard for d?T neutron fluence and energy.Nucl.Instrum.Methods 174,141-144(1980).https://doi.org/10.1016/0029-554X(80)90422-X
9.NuDat 2.6(selected evaluated nuclear structure data),Decay Radiation database version of 2017-5-18,IAEA Nuclear Data Services.https://www-nds.iaea.org/
10.R.B.Firestone,V.S.Shirley,Table of Isotopes(Wiley,New York,1996)
11.X.Z.Kong,R.Wang,Y.C.Wang et al.,Cross sections for13.5-14.7 MeV neutron induced reactions on palladium isotopes.Appl.Radiat.Isot.50,361-364(1999).https://doi.org/10.1016/s0969-8043(97)10144-0
12.F.Q.Zhou,X.Q.Yang,W.F.Wang et al.,A formula used to subtract the effect of c-ray of the others to that of measured reaction in measurement of cross section of nuclear reaction and its application.Chin.Phys.C 32,873-976(2008).https://doi.org/10.1088/1674-1137/32/11/005
13.A.A.Filatenkov,Neutron activation cross sections measured at KRI in neutron energy region 13.4-14.9 MeV.USSR Report to the INDC.No.0460,Austria(2016).https://www-nds.iaea.org/publications/indc/indc-ccp-0460-rev.pdf
14.A.A.Filatenkov,S.V.Chuvaev,Experimental determination of cross sections for several insufficiently known neutron induced reaction on heavy nuclei(Z=74-79).Khlopin Radiev.Inst.,Leningrad Reports,No.259(2003).http://www-nds.iaea.org/EXFOR/41428.052
15.S.M.Qaim,C.Graca,Neutron activation cross sections at14.7 MeV for isotopes of tungsten.Nucl.Phys.A 242,317-322(1975).https://doi.org/10.1016/0375-9474(75)90052-4
16.A.A.Filatenkov,S.V.Chuvaev,V.A.Yakovlev et al.,Rept:Khlopin Radiev.Inst.,Leningrad Reports,No.252(1999).http://www-nds.iaea.org/EXFOR/41298.092
17.A.Poularikas,R.W.Fink,D.G.Gardner,Absolute activation cross-sections for 14.8 neutrons.University of Arkansas Reports,No.59,4(1960).http://www-nds.iaea.org/EXFOR/12181.004
18.S.Murahira,Y.Satoh,N.Honda,et al.,Measurement of formation cross sections producing short-lived nuclei by 14 MeVneutrons-Pr,Ba,Ce,Sm,W,Sn,Hf.Conf:Japanese report to the INDC.,No.175,171(1996).http://www-nds.iaea.org/EXFOR/22311.014
19.S.K.Mukherjee,H.Bakhru,Some(n,a)reaction cross-sections and the resulting radio-isotopes.Conf:Nucl.and Sol.State Physics Symp.,Bombay,244(1963).http://www-nds.iaea.org/EXFOR/31330.012
20.R.F.Coleman,B.E.Hawker,L.P.Oonnor et al.,Cross sections for(n,p)and(n,a)reactions with 14.5 MeV neutrons.Proc.Phys.Soc.73,215-220(1959).https://doi.org/10.1088/0370-1328/73/2/308
21.Evaluated Nuclear Data File(ENDF),Database Version of2017-06-01,Nuclear Data Services.https://www-nds.iaea.org/
22.M.Wagner,H.Vonach,A.Pavlik et al.,Evaluation of cross sections for 14 important neutron-dosimetry reactions.Phys.Daten Phys.Data 13-5,183(1990)
2.J.Zhong,X.G.Wu,Y.J.Ma et al.,A development of lifetime measurement based on the differential decay curve method.Nucl.Sci.Tech.29,108-1-7(2018).https://doi.org/10.1007/s41365-018-0453-6
3.C.Y.Xiong,M.Z.Liu,Z.Zuo et al.,Ballistic deficit compensation method for a large-volume HPGe detector at high count rates.Nucl.Sci.Tech.27,67-1-9(2016).https://doi.org/10.1007/s41365-016-0063-0
4.X.M.Zhou,G.M.Liu,D.Li et al.,Using activation method to measure neutron spectrum in an irradiation chamber of a research reactor.Nucl.Sci.Tech.25,010603-1-5(2014).https://doi.org/10.13538/j.1001-8042/nst.25.010603
5.S.U.Rehman,S.M.Mirza,N.M.Mirza et al.,GEANT4 simulation of photo-peak efficiency of small high purity germanium detectors for nuclear power plant applications.Ann.Nucl.Energy38,112-117(2011).https://doi.org/10.1016/j.anucene.2010.08.010
6.W.X.Yu,X.L.Huang,X.J.Chen et al.,Evaluation of the relative c-ray intensities emitted from56Co and66Ga.Nucl.Sci.Tech.20,363-368(2009).https://doi.org/10.13538/j.1001-8042/nst.20.363-368
7.M.A.Mariscotti,A method for automatic identification for peaks in the presence of background and its application to spectrum analysis.Nucl.Instrum.Methods 50,309-320(1967).https://doi.org/10.1016/0029-554x(67)90058-4
8.V.E.Levis,K.J.Zieba,A transfer standard for d?T neutron fluence and energy.Nucl.Instrum.Methods 174,141-144(1980).https://doi.org/10.1016/0029-554X(80)90422-X
9.NuDat 2.6(selected evaluated nuclear structure data),Decay Radiation database version of 2017-5-18,IAEA Nuclear Data Services.https://www-nds.iaea.org/
10.R.B.Firestone,V.S.Shirley,Table of Isotopes(Wiley,New York,1996)
11.X.Z.Kong,R.Wang,Y.C.Wang et al.,Cross sections for13.5-14.7 MeV neutron induced reactions on palladium isotopes.Appl.Radiat.Isot.50,361-364(1999).https://doi.org/10.1016/s0969-8043(97)10144-0
12.F.Q.Zhou,X.Q.Yang,W.F.Wang et al.,A formula used to subtract the effect of c-ray of the others to that of measured reaction in measurement of cross section of nuclear reaction and its application.Chin.Phys.C 32,873-976(2008).https://doi.org/10.1088/1674-1137/32/11/005
13.A.A.Filatenkov,Neutron activation cross sections measured at KRI in neutron energy region 13.4-14.9 MeV.USSR Report to the INDC.No.0460,Austria(2016).https://www-nds.iaea.org/publications/indc/indc-ccp-0460-rev.pdf
14.A.A.Filatenkov,S.V.Chuvaev,Experimental determination of cross sections for several insufficiently known neutron induced reaction on heavy nuclei(Z=74-79).Khlopin Radiev.Inst.,Leningrad Reports,No.259(2003).http://www-nds.iaea.org/EXFOR/41428.052
15.S.M.Qaim,C.Graca,Neutron activation cross sections at14.7 MeV for isotopes of tungsten.Nucl.Phys.A 242,317-322(1975).https://doi.org/10.1016/0375-9474(75)90052-4
16.A.A.Filatenkov,S.V.Chuvaev,V.A.Yakovlev et al.,Rept:Khlopin Radiev.Inst.,Leningrad Reports,No.252(1999).http://www-nds.iaea.org/EXFOR/41298.092
17.A.Poularikas,R.W.Fink,D.G.Gardner,Absolute activation cross-sections for 14.8 neutrons.University of Arkansas Reports,No.59,4(1960).http://www-nds.iaea.org/EXFOR/12181.004
18.S.Murahira,Y.Satoh,N.Honda,et al.,Measurement of formation cross sections producing short-lived nuclei by 14 MeVneutrons-Pr,Ba,Ce,Sm,W,Sn,Hf.Conf:Japanese report to the INDC.,No.175,171(1996).http://www-nds.iaea.org/EXFOR/22311.014
19.S.K.Mukherjee,H.Bakhru,Some(n,a)reaction cross-sections and the resulting radio-isotopes.Conf:Nucl.and Sol.State Physics Symp.,Bombay,244(1963).http://www-nds.iaea.org/EXFOR/31330.012
20.R.F.Coleman,B.E.Hawker,L.P.Oonnor et al.,Cross sections for(n,p)and(n,a)reactions with 14.5 MeV neutrons.Proc.Phys.Soc.73,215-220(1959).https://doi.org/10.1088/0370-1328/73/2/308
21.Evaluated Nuclear Data File(ENDF),Database Version of2017-06-01,Nuclear Data Services.https://www-nds.iaea.org/
22.M.Wagner,H.Vonach,A.Pavlik et al.,Evaluation of cross sections for 14 important neutron-dosimetry reactions.Phys.Daten Phys.Data 13-5,183(1990)