Difference between revisions of "NKS-B GammaTest:Spectra for calibration"

Revision as of 14:42, 4 June 2013

The task is to report at least all identified nuclides - perfect solution includes the identification of all significant peaks, including background peaks i.e. no background subtraction. All the relevant spectra is here: Spectra for calibration

1. Peak/nuclide identification exercise spectrum file: 12711G6.chn

• Sample: sewage sludge sample in 0.5 l Marinelli beaker
• Detector: coaxial, p-type HPGe detector, relative efficiency 39%
• Energy calibration options
  1. spectrum: calibG6.chn, certificate of calibration source: certif.txt (files attached)
  2. energy calibration equation: E = 0.3337 * ch – 0.183 (E= energy in keV, ch = channel)
  3. channel-energy –pairs:
     • 140.2 – 46.54 keV
     • 1531.4 ¬– 511.0
     • 4378.6 – 1460.8
     • 7835.4 – 2614.5

2. Peak/nuclide identification exercise; spectrum file: 11100B1.chn

• sample: contaminated film dosimeter
• detector: Canberra BEGe detector BE5030, relative efficiency 50%, thin entrance window,thin Ge dead layer
• energy calibration options
  1. energy calibration equation: E = 0.3305 * ch + 0.7301 (E= energy in keV, ch = channel)
  2. channel – energy -pairs:
     • 67.7 – 23.1 keV
     • 516.3 ¬– 171.3
     • 740.2 – 245.4
     • 1258.3 – 416.6