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
