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The energy spectrum of 662 keV photons in a water equivalent phantom

Akar Tarim, U, Gurler, O, Ozmutlu, EN, Yalcin, S, Gundogdu, O, Sharaf, JM and Bradley, DA (2012) The energy spectrum of 662 keV photons in a water equivalent phantom Radiation Physics and Chemistry, 81 (7). pp. 745-748.

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Investigation is made on the energy spectrum of photons originating from interactions of 662 keV primary gamma-ray photons emitted by a point source positioned at the centre of a water equivalent solid phantom of dimensions 19 cm×19 cm×24 cm. Peaks resulting from total energy loss (photopeak) and multiple and back scattering have been observed using a 51 mm×51 mm NaI(Tl) detector; good agreement being found between the measured and simulated response functions. The energy spectrum of the gamma photons obtained through the Monte Carlo simulation reveals local maxima at about 100 keV and 210 keV, being also observed in the experimental response function. Such spectra can be used as a method of testing the water equivalence of solid phantom media before their use for dosimetry measurements.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Akar Tarim, U
Gurler, O
Ozmutlu, EN
Yalcin, S
Gundogdu, O
Sharaf, JM
Date : July 2012
DOI : 10.1016/j.radphyschem.2012.03.019
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:24
Last Modified : 24 Jan 2020 22:10

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