Suren Kandasamy Dissertation.pdf - University of Surrey
Suren Kandasamy Dissertation.pdf - University of Surrey
Suren Kandasamy Dissertation.pdf - University of Surrey
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Number <strong>of</strong> counts128.78 keV244.70 keV344.27 keV778.90 keV964.00 keV1112.05 keV1407.92 keVM.Sc <strong>Dissertation</strong>1600001400001200001000008000060000400002000000 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500Energy (keV)Figure 4.6 Pulse height spectrum for 152 Eu gamma rays source taken withLaCl 3 :Ce scintillator detector for 600 sec4.4 Energy resolutionAfter calibration <strong>of</strong> MCA the spectrum <strong>of</strong> 137 Cs, 60 Co, 22 Na and 152 Eu wascollected. For each spectrum the FWHM (keV) was recorded from the MCA, usingmaestro for windows s<strong>of</strong>tware. Table 4.4 shows the values <strong>of</strong> FWHM (keV)corresponding peak energies. Then the resolution (%) was calculated using the Eq. 2.3.And also the resolution <strong>of</strong> constant times one over square root <strong>of</strong> energy was calculated.Table 4.4 Energy resolution <strong>of</strong> 137 Cs, 60 Co, 22 Na and 152 Eu for LaCl 3 :Ce detectorEnergy(keV)FWHM(keV)Resolution%ResolutionError (±)76.3energy ( keV )121.78 14.71 11.26 0.82 6.91244.70 18.41 7.52 0.41 4.88344.27 17.50 5.37 0.29 4.11511.00 20.36 4.18 0.20 3.38661.67 24.51 3.70 0.15 2.97778.96 25.23 3.24 0.13 2.73964.00 27.47 2.85 0.10 2.461112.05 31.95 2.87 0.09 2.291173.24 32.80 2.80 0.09 2.231274.50 35.34 2.77 0.08 2.141332.50 37.10 2.78 0.08 2.091407.92 38.04 2.70 0.07 2.03K. <strong>Suren</strong> 24
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