Difference between revisions of "Determination of Unknown Sample"
From mn/safe/nukwik
Line 4: | Line 4: | ||
*Determine the absolute amount of the metal. Use the counts measured in table 3 and theefficiency curve you made in exercise 3B. Use at least two different <span class="texhtml">γ</span> lines to do this, we recommend E<sub><span class="texhtml">γ</span></sub> = 222.08 keV and E<sub><span class="texhtml">γ</span></sub> 1 MeV. The neutron flux was 10<sup>5</sup> n/(s cm<sup>2</sup>) during the irradiation, and the irradiation time was 18 days. The sample was measured directly after the irradiation. | *Determine the absolute amount of the metal. Use the counts measured in table 3 and theefficiency curve you made in exercise 3B. Use at least two different <span class="texhtml">γ</span> lines to do this, we recommend E<sub><span class="texhtml">γ</span></sub> = 222.08 keV and E<sub><span class="texhtml">γ</span></sub> 1 MeV. The neutron flux was 10<sup>5</sup> n/(s cm<sup>2</sup>) during the irradiation, and the irradiation time was 18 days. The sample was measured directly after the irradiation. | ||
− | {| width="551 | + | {| width="551" cellspacing="1" cellpadding="1" border="1" style="" |
− | |+ Table 3: results from spectroscopy of unknown sample | + | |+ Table 3: results from spectroscopy of unknown sample |
|- | |- | ||
− | | Photo Peak no. | + | | Photo Peak no. |
− | | Energy (keV | + | | Energy (keV |
− | | Net Count | + | | Net Count |
− | | Uncertainty | + | | Uncertainty |
| FWHM (keV | | FWHM (keV | ||
|- | |- | ||
− | | align="right" | 1 | + | | align="right" | 1 |
− | | align="right" | 67.63 | + | | align="right" | 67.63 |
− | | align="right" | 166011 | + | | align="right" | 166011 |
− | | align="right" | 1885 | + | | align="right" | 1885 |
| align="right" | 0.44 | | align="right" | 0.44 | ||
|- | |- | ||
− | | align="right" | 2 | + | | align="right" | 2 |
− | | align="right" | 100.26 | + | | align="right" | 100.26 |
− | | align="right" | 79985 | + | | align="right" | 79985 |
− | | align="right" | 902 | + | | align="right" | 902 |
| align="right" | 1.00 | | align="right" | 1.00 | ||
|- | |- | ||
− | | align="right" | 3 | + | | align="right" | 3 |
− | | align="right" | 152.56 | + | | align="right" | 152.56 |
− | | align="right" | 34987 | + | | align="right" | 34987 |
− | | align="right" | 401 | + | | align="right" | 401 |
| align="right" | 1.16 | | align="right" | 1.16 | ||
|- | |- | ||
− | | align="right" | 4 | + | | align="right" | 4 |
− | | align="right" | 222.08 | + | | align="right" | 222.08 |
− | | align="right" | 29011 | + | | align="right" | 29011 |
− | | align="right" | 335 | + | | align="right" | 335 |
| align="right" | 1.52 | | align="right" | 1.52 | ||
|- | |- | ||
− | | align="right" | 5 | + | | align="right" | 5 |
− | | align="right" | 511 | + | | align="right" | 511 |
− | | align="right" | 210890 | + | | align="right" | 210890 |
− | | align="right" | 2385 | + | | align="right" | 2385 |
| align="right" | 2.24 | | align="right" | 2.24 | ||
|- | |- | ||
− | | align="right" | 6 | + | | align="right" | 6 |
− | | align="right" | 1121.14 | + | | align="right" | 1121.14 |
− | | align="right" | 32098 | + | | align="right" | 32098 |
− | | align="right" | 391 | + | | align="right" | 391 |
| align="right" | 1.67 | | align="right" | 1.67 | ||
|- | |- | ||
− | | align="right" | 7 | + | | align="right" | 7 |
− | | align="right" | 1188.7 | + | | align="right" | 1188.7 |
− | | align="right" | 14563 | + | | align="right" | 14563 |
− | | align="right" | 173 | + | | align="right" | 173 |
| align="right" | 1.17 | | align="right" | 1.17 | ||
|- | |- | ||
− | | align="right" | 8 | + | | align="right" | 8 |
− | | align="right" | 1221.28 | + | | align="right" | 1221.28 |
− | | align="right" | 23825 | + | | align="right" | 23825 |
− | | align="right" | 265 | + | | align="right" | 265 |
| align="right" | 2.01 | | align="right" | 2.01 | ||
|} | |} | ||
+ | |||
+ | [[Category:Neutron_Activation_Analysis]][[Category:HPGe_detector]][[Category:Gamma_spectroscopy]] |
Revision as of 10:54, 27 June 2012
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 theefficiency 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.
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 |