1、 KS A ISO 11929 3 KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS 3: KS A ISO 11929 3 : 2002 (2007 ) 2002 10 12 http:/www.kats.go.kr : ( ) ( ) ( ) KEPIC : (http:/www.standard.go.kr) : : 2002 10 12 : 2007 10 31 2007-0953 : ( 02-509-7270) . (http:/www.kats.go.kr) 7 5 , . ICS 17.240 KS 3: A ISO 11929 3: 2002(
2、2007 ) Determination of the detection limit and decision threshold for ionizing radiation measurements Part 3:Fundamentals and application to counting measurements by high resolution gamma spectrometry without the influence of sample treatment 2000 1 ISO 11929 3, Determination of the detection limit
3、 and decision threshold for ionizing radiation measurements Part 3: Fundamentals and application to counting measurements by high resolution gamma spectrometry without the influence of sample treatment . 1. 1 11. . ( ). . . 2. . . . IEC ISO . 3. . 3.1 . 3.2 , 3.3 s= 0 s 0 *nR Rn , *nR . A ISO 11929
4、3: 2002 2 ( 1 ) . 3.4 s= 0 s 0 n= s 0: n 0 , s= 0 ( 2 ) . . 3.5 1 100 % n 3.6 ROl( ) . 3.7 ( ) 3.8 . 3.9 ( 1 ) 3.10 , 3.11 , , , , , . 4. N0ROI( ) NsROI NnROI t R0ROI 0R0 RsROI sRs Rn , nRn *nR Rn *n Rn h FWHM b (ROI) l1, l2 N1, N2 1 : s= 0 s 0 2 : s= 0 s 0 A ISO 11929 3: 2002 3 1 n k1 k1 ( 2 ) k(1
5、/ 2)5. 5.1 Poisson . N s t Poisson . N0 0 t Poisson . Poisson . 0 t N1, N2 . t , . 5.2 Rn , *nR . . g . . )0(1*= nnRvarkR(1) k1 2 . 1 . 5.3 ( 5.2 ) n ( 2 ). , ( , , ) . n*n s= 0 ( 2 ) n )(*1*nnnnvarkR =+=(2) )()0(*11 nnnRvarkRvark =+=(3) )0()0( =nnRvarRvar )0()(11*=+= nnRvarkK (4) = . *2nnR= (5) k1
6、, k1 2 . 1 . 5.4 (1 ) A ISO 11929 3: 2002 4 . n (1 )100 % n . 6. ( A ) 6.1 , 1 , = = = 0.025 . ( 2 ). = = /2 var(Rn) Rn , Rn=*nR *nR K1 var(Rn) (0,*n ) . . 6.2 , FWHM h Gaussian h b 2.5h . b 4 . . ( 1 ). b 2l 10b (6) 2l =l1 l2 (7) . FWHM h . 1 6.3 trapezoid rule A1 A2 . A ISO 11929 3: 2002 5 lbNNN2)
7、(210+= (8) . ISO 11929 . 6.4 (3.1) (5.3 ) . 1 . . , . 6.5 1 . (5.2 ). 6.6 , . 1 , , (3.8 ). 1 trapezoid +=btbtktRtbtkRn21241221021*(11)+=tbtRkRn2101* (12) b = 2l tRkRn01*2= (13) +=tbkkttbtkkn21)(4121)(211011* (14) 0 R0 +=tbtkk21)(011*0 (15) b = 2l tkkn011*2)( += (16) tbtRtRkRtbtRtRkRsnsn220)2/(100)2
8、/(1+ (17) b = 2l tRtRkRtRtRKRsnsn0)2/(10)2/(1+ (18) , 0 t R0 t . = = /2 = 0.025 . 1 0.045 0.055 . b = 2l = 1; 0.5; 0.25; 0.1 0 t 2; 5; 15; 25. 2 0.03 0.05 0.94 . b = 2l . , ROI . , , 0.01 . ISO 11929 1 . A ISO 11929 3: 2002 6 2 1 k1 , k1 , k1( /2) ( ) k1 , k1 1 k1 ( /2)0.158 6 0.682 1.000 0.100 0 0.
9、800 1.282 0.050 0 0.900 1.645 0.025 0 0.950 1.900 0.022 8 0.955 2.000 0.010 0 0.980 2.326 0.005 0 0.990 2.576 0.001 4 0.997 3.000 0.001 0 0.998 3.090 A ISO 11929 3: 2002 7 A() : = = 0.025; k1 =k1 = 1.96 1 = 0.95; k1 ( /2)= 1.96 t= 26 600 s: b = 8 ; l = 4 h = 0.000 39 s 1/Bq : N0= 12 312; Ns= 12 202
10、: R0= 0.463 s 1; Rs= 0.459 s 1Rn=Rs R0= 0; 0= R0 (12), 1 : 1*022.0428160026463.096.1=+= sRn28 Bq . (15), 1 : 1*s022.0428160026463.0)96.196.1(=+=n 57 Bq . (17), 1 : Rn= 0 . A ISO 11929 3: 2002 8 1 ALTSCHULER, B. and PASTERNACK, B. Health Physics 9 (1963), pp. 293 298 2 BARINGHAUS, L., MENDE, O., WUEN
11、ECKE, C. D., and ZIMMERMANN, H. Nachweis und Erkennungsgrenzen beispektrometrischen Kemstrahlungsmessungen, Schlussbericht zum Forschungsvorhaben St.Scg. 1106 des Bundesministers fr Umwelt, Reaktorsicherheit und Naturschutz, Mrz 1991 3 CHUNG, K. L. Elementary probability theory with stochastic proce
12、sses. Springer Verlag, Berlin 1979 4 CURRIE, L. A. Limits for Qualitative Detection and Quantitative Determination. Anal. Chem. 40 (1968), pp.586593 5 FELLER,W.An Introduction to Probability Theory and Its Applications. Wiley, New York, 1968, 3rd ed 6 HAERTTER, E. Wahrsmeinlichkeitsrechnung, Statist
13、ik u. mathematische Grimdlagen. Vandenhoeck und Ruprecht, Gttingen, 1987 7 KREYSZIG, E. Introduction mathematical statistics. Wiley, New York, 1970 8 MARDIA, K. and ZEMROCK, P. Tables of the F-and related distributions with algorithms. Academic Press, New York, 1978 9 NICHOISON, W. L. Fixed time est
14、imation of counting rates with background corrections. Hanford Laboratories, Richland, 1963 10 STANGE, K. Angewandte Statistik, Teil 1 und Teil 2. Springer Verlag, Berlin 1970/72 11 WEISE, L. Statistische Auswertung von Kernstrahlungsmessungen. Oldenbourg Verlag, Mnchen und Wien 1971 12 DIN 25482 5:
15、 1993 06, Limit of detection and limit of decision for nuclear radiation measurements Part 5:Counting measurements by high resolution gamma spectrometry, neglecting the influence of sample treatment 13 DIN 25482 5 BBL 1: 1997 12, Limit of detection and limit of decision for nuclear radiation measure
16、ments Part 5: Counting measurements by high resolution gamma spectrometry, neglecting the influence of sample treatmentComments and examples 3 : 135513 7017 (02)60094567 (02)600948878 http:/ KS A ISO 11929 3: 2002KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Determination of the detection limit and decision threshold for ionizing radiation measurements Part 3:Fundamentals and application to counting measurements by high resolution gamma spectrometry without the influence of sample treatment ICS 17.24 Korean Agency for Technology and Standards http:/www.kats.go.kr
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