Appendix D - Peaks found in Background Spectra

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EnergyNuclidePg%Related peaksSource of radiation
8.04CuKa29.38.91fluorescence from shielding
8.91CuKb4.78.04fluorescence from shielding
22.98CdKa224.523.17fluorescence from shielding
23.17CdKa146.122.98fluorescence from shielding
25.04SnKa224.725.27fluorescence from shielding
25.27SnKa145.725.04fluorescence from shielding
26.10CdKb17.6922.98fluorescence from shielding
26.64CdKb21.9822.98fluorescence from shielding
28.49SnKb17.9925.27fluorescence from shielding
29.11SnKb22.1925.27fluorescence from shielding
46.54210Pb4.25none238U (226Ra) series
53.23214Pb1.06295.22 (18.50), 351.93 (35.60)238U (226Ra) series
53.4473mGe10.3472Ge(n,g), 74Ge(n,2n)
63.28234Th4.892.58 (5.58)238U series
68.7573*Ge73Ge(n,n') broad asymmetric peak
72.81PbKa227.774.97 (46.2)fluorescence, and 208Tl decay
74.82BiKa227.777.11 (46.2)212,214Pb decay
74.97PbKa146.272.81 (27.7)fluorescence, and 208Tl decay
77.11BiKa146.274.82 (27.7)212,214Pb decay
79.29PoKa146.1fluorescence, and 212,214Bi decay
81.23231Th0.9235U series
84.94PbKb110.774.97 (46.2)fluorescence, and 208Tl decay
87.30PbKb23.9174.97 (46.2)fluorescence, and 208Tl decay
87.35BiKb110.774.82 (27.7)212,214Pb decay
89.78BiKb23.9374.82 (27.7)212,214Pb decay
89.96ThKa228.193.35 (45.4)235U and 228Ac decay
92.58234Th5.5863.28 (4.8)238U series - doublet
93.35ThKa145.489.96 (28.1)235U and 228Ac decay
105.60ThKb110.793.35 (45.4)235U and 228Ac decay
109.16235U1.54185.72 (57.2)primordial
112.81234Th0.2863.28 (4.8), 92.58 (5.58)238U series
122.32223Ra1.192269.49 (13.7)235U series
129.06228Ac2.42911.20 (25.8), 968.97 (15.8)232Th series
139.6875mGe39744Ge(n,g), 76Ge(n,2n)
143.76235U10.96primordial
159.7 77mGe10.3376Ge(n,g)
163.33238U5.08185.72 (57.2)primordial
174.9571mGev. small198.39 (?100)70Ge(n,g) activation (summed out)
185.72235U57.2143.76 10.96)primordial
186.21226Ra3.555none238U series
198.3971mGesum70Ge(n,g)
205.31235U5.01185.72 (57.2)primordial
209.26228Ac3.89911.20 (25.8), 968.97 (15.8)232Th series
238.63212Pb43.6300.09 (3.18)232Th series
240.89224Ra4.12232Th series
242.00214Pb7.268295.22 (18.50), 351.93 (35.6)238U (226Ra) series
269.49223Ra13.7122.32 (1.192)235U series
270.24228Ac3.46911.20 (25.8), 968.97 (15.8)232Th series
277.37208Tl2.37583.19 (30.6), 2614.51 (35.85)232Th series Note1
278.2664*Cu63Cu(n,g), 65Cu(n,2n) promptg
295.22214Pb18.5351.93 (35.60)238U (226Ra) series
299.98227Th2.16235U series
300.07231Pa2.47235U series
300.09212Pb3.18238.63 (43.6)232Th series
328.00228Ac2.95911.20 (25.8), 968.97 (15.8)232Th series
336.24115mCd/115mIn45.9527.90 (27.5)Activation of Cd (daughter of 115Cd)
338.28223Ra2.79235U series
338.32228Ac11.27911.20 (25.8), 968.97 (15.8)232Th series
351.06211Bi12.91235U series
351.93214Pb35.6295.22 (18.50)238U (226Ra) series
409.46228Ac1.92911.20 (25.8), 968.97 (15.8)232Th series
416.86116mIn27.7115In(n,g) activation of In metal seal
447.607Be10.44nonecosmic
462.00214Pb0.213295.22 (18.50), 351.93 (35.6)238U (226Ra) series
463.00228Ac4.4911.20 (25.8), 968.97 (15.8)232Th series
510.70208Tl6.29583.19 (30.6), 2614.51 (35.85)232Th series Note1
511.00AnnihilationAnnihilation radiation (b+)
527.90115Cd27.5336.2(45.9)114Cd(n,g) activation
558.46114*Cd113Cd(n,g) promptg
569.7 207*Pb97.87207Pb(n,n')
570.82228Ac0.182911.20 (25.8), 968.97 (15.8)232Th series
579.20207*Pb207Pb(n,n') promptg
583.19208Tl30.62614.51 (35.85)232Th series Note1
595.8574*Ge74Ge(n,n') broad asymmetric peak
609.31214Bi45.491120.29 (14.907), 1764.49 (15.28)238U (226Ra) series
661.66137Cs84.99nonefission
669.6263*Cu63Cu(n,n') promptg
689.6 72*Ge72Ge(n,n') broad asymmetric peak
726.86228Ac0.62911.20 (25.8), 968.97 (15.8)232Th series
727.33212Bi6.741620.74 (1.51)232Th series
755.31228Ac1911.20 (25.8), 968.97 (15.8)232Th series
768.36214Bi4.891609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
794.95228Ac4.25911.20 (25.8), 968.97 (15.8)232Th series
803.06206*Pb206Pb(n,n) promptg
806.17214Bi1.262609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
832.01211Pb3.52235U series
835.71228Ac1.61911.20 (25.8), 968.97 (15.8)232Th series
839.04214Pb0.587295.22 (18.50), 351.93 (35.6)238U (226Ra) series
843.7627Mg71.826Mg(n,g) or 27Al(n,p) of encapsulation
846.7756*Fe56Fe(n,n')
860.56208Tl4.48583.19 (30.6), 2614.51 (35.85)232Th series Note1
911.20228Ac25.8968.97 (15.8)232Th series
934.06214Bi3.096609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
962.0663*Cu63Cu(n,n') promptg
964.77228Ac4.99911.20 (25.8), 968.97 (15.8)232Th series
968.97228Ac15.8911.20 (25.8)232Th series
1001.03234mPa1.021238U series (GRG empirical Pg)
1014.4427Mg2826Mg(n,g) or 27Al(n,p ) of encapsulation
1063.66207*Pb88.5207*Pb(n,n')
1097.3 ll6In56.21293.54 (84.4)115In(n,g) activation of In metal seal
1115.5665*Cu65Cu(n,n')
1120.29214Bi14.907609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1155.19214Bi1.635609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1173.2360Co99.851332.49 (99.98)activation
1238.11214Bi5.827609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1293.54116In84.41097.3 (56.2)115In(n,g) activation of In metal seal
1332.4960Co99.981173.23 (99.85)activation
1377.67214Bi3.967609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1407.98214Bi2.389609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1459.14228Ac0.83911.20 (25.8), 968.97 (15.8)232Th series
1460.8240K10.66noneprimordial
1588.2228Ac3.22911.20 (25.8), 968.97 (15.8)232Th series
1620.74212Bi1.51727.33 (6.74)232Th series
1630.63228Ac1.51911.20 (25.8), 968.97 (15.8)232Th series
1729.60214Bi2.843609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
1764.49214Bi15.28609.31 (45.49), 1764.49 (15.28)238U(226Ra) series
1847.42214Bi2.023609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
2204.21214Bi4.913609.31 (45.49), 1764.49 (15.28)238U (226Ra) series
2224.572*H1H(n,g)
2614.51208Tl35.85583.19 (30.6)232Th series; 208Pb(n,p) Note1

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