Difference between revisions of "Determination of Unknown Sample"

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[[Gamma Spectroscopy Analysis]]
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In table 3 the analysis results of the unknown, n-irradiated sample is shown. Use the results to :  
 
In table 3 the analysis results of the unknown, n-irradiated sample is shown. Use the results to :  

Revision as of 12:37, 28 June 2012

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In table 3 the analysis results of the unknown, n-irradiated sample is shown. Use the results to :

  • Determine which metal the sample consist of. Use the identified γ-ray energies to do this. if you need a database you can use this one
  • Determine the absolute amount of the metal. Use the counts measured in table 3 and the efficiency curve you made in exercise 3B. Use at least two different γ lines to do this, we recommend Eγ = 222.08 keV and Eγ 1 MeV. The neutron flux was 105 n/(s cm2) during the irradiation, and the irradiation time was 18 days. The sample was measured directly after the irradiation.
Table 3: results from spectroscopy of unknown sample
Photo Peak no. Energy (keV Net Count Uncertainty FWHM (keV
1 67.63 166011 1885 0.44
2 100.26 79985 902 1.00
3 152.56 34987 401 1.16
4 222.08 29011 335 1.52
5 511 210890 2385 2.24
6 1121.14 32098 391 1.67
7 1188.7 14563 173 1.17
8 1221.28 23825 265 2.01