200,000 second background - 200 - 700 keV

Home Page | Examples Page | 0 - 200 keV | 700 - 1200 keV | 1200 - 2000 keV

This spectrum was measured using a 45% n-type detector, mounted in a standard 10cm thick cylindrical graded shield, in a routine laboratory at typical altitude with no special background suppression facilities.

Measured
Energy
(keV)
True
Energy
(keV)
Peak
Counts
NuclideEmission
Probability
(%)
Source of radiation
1205.37205.31484235U5.01Primordial
205.68214Pb0.0114238U series (226Ra)
2209.4209.26879228Ac3.89232Th series
3238.62238.638413212Pb43.6232Th series
4240.76240.99636220Ra4.12235U series
240.99224Ra4.12232Th series
5241.912421648214Pb7.268238U series (226Ra)
6269.4268.8213214Bi0.0161238U series (226Ra)
269.46223Ra13.7235U series
7270.27270.24597228Ac3.46232Th series
8277.61277.37402208Tl6.6232Th series
9295.35295.223588214Pb18.5238U series (226Ra)
10300.4299.98545227Th2.16235U series
300.09212Pb3.18232Th series
11327.99327.44388228Ac0.12232Th series
327.94212Bi0.121232Th series
328228Ac2.95232Th series
12338.48338.281672223Ra2.79235U series
338.32228Ac11.27232Th series
13352.05351.935877214Pb35.6238U series (226Ra)
14409.59409.46427228Ac1.92232Th series
15463.14463793228Ac4.4232Th series
16511.15510.77048208Tl22.6232Th series
17558.39558.46331114*Cd1113Cd(n,g) prompt g
18570.15569.7349207mPb97.87207Pb(n,n')
570.82228Ac0.182232Th series
19583.45583.192900208Tl85232Th series
583.41228Ac0.111232Th series
20609.51609.314969214Bi45.49238U series (226Ra)
21661.88661.1263214Bi0.0537238U series (226Ra)
661.66137Cs84.99fission

Appendices Data Example Spectra Links Spreadsheets Test Spectra TOP

This website is sponsored by Nuclear Training Services Ltd. and created by NTSNet
Copyright © 2007 Dr Gordon Gilmore. Problems with this page? Contact