IAEA RGU-1 Reference Material - 700 - 1200 keV

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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. The material is IAEA RGU-1 reference material. The spectrum represents 120 ml of that, measured in a cylindrical container stood on the detector face. Sample height was 41 mm. There is negligible thorium in this material, but the spectrum is likely to contain peaks from the 232Th decay series from the natural background. The are a number of inidentified peaks in the spectrum that could well be coincidence sum peaks.

Measured
Energy
(keV)
True
Energy
(keV)
Peak
Counts
NuclideEmission
Probability
(%)
Source of radiation
1703.61703.119864214Bi0.479238U series (226Ra)
704.9214Bi0.051238U series (226Ra)
2710.76710.671132214Bi0.0764238U series (226Ra)
3720.24719.867721214Bi0.393238U series (226Ra)
4722.97722.98801214Bi0.037238U series (226Ra)
5727.33727.33713212Bi6.74232Th series
6742.66742.86498234mPa0.096238U series
7752.98752.842573214Bi0.126238U series (226Ra)
8766.37765.9610218214Pb0.053238U series (226Ra)
766.37234mPa0.316238U series
9768.35768.36101157214Bi4.891238U series (226Ra)
10786.18785.9625049214Pb1.064238U series (226Ra)
786.1214Bi0.314238U series (226Ra)
786.27234mPa0.055238U series
11806.38806.1724820214Bi1.262238U series (226Ra)
12821.29821.183531214Bi0.166238U series (226Ra)
13826.43826.32895214Bi0.129238U series (226Ra)
14832.07832.394048214Bi0.0346238U series (226Ra)
15839.24839.0413357214Pb0.587238U series (226Ra)
16904.43904.291252214Bi0.066238U series (226Ra)
17911.14911.22025228Ac25.8232Th series
18934.14934.0654855214Bi3.096238U series (226Ra)
19964.77964.085640214Bi0.363238U series (226Ra)
20968.97968.97829228Ac15.8232Th series
21990.56991.49465214Bi0.0105238U series (226Ra)
221001.031001.0316952234mPa0.839238U series
231051.961051.965161214Bi0.324238U series (226Ra)
241069.951069.964925214Bi0.271238U series (226Ra)
251103.991103.643244214Bi0.106238U series (226Ra)
1104.79214Bi0.073238U series (226Ra)
261120.141118.9243017214Bi0.01238U series (226Ra)
1120.29214Bi14.907238U series (226Ra)
271133.551133.663602214Bi0.254238U series (226Ra)
281155.011155.1927235214Bi1.635238U series (226Ra)
291172.861172.981156214Bi0.055238U series (226Ra)

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